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1 | If you read this file _as_is_, just ignore the funny characters you see. |
2 | It is written in the POD format (see pod/perlpod.pod) which is specially | |
3 | designed to be readable as is. | |
4 | ||
8e07c86e AD |
5 | =head1 NAME |
6 | ||
cb8c159f | 7 | INSTALL - Build and Installation guide for perl 5. |
8e07c86e AD |
8 | |
9 | =head1 SYNOPSIS | |
10 | ||
7df75831 | 11 | First, make sure you have an up-to-date version of Perl. If you |
ce80d64e AD |
12 | didn't get your Perl source from CPAN, check the latest version at |
13 | http://www.cpan.org/src/. Perl uses a version scheme where even-numbered | |
08854360 | 14 | subreleases (like 5.8.x and 5.10.x) are stable maintenance releases and |
ce80d64e AD |
15 | odd-numbered subreleases (like 5.7.x and 5.9.x) are unstable |
16 | development releases. Development releases should not be used in | |
17 | production environments. Fixes and new features are first carefully | |
18 | tested in development releases and only if they prove themselves to be | |
19 | worthy will they be migrated to the maintenance releases. | |
3ce0d271 | 20 | |
7df75831 | 21 | The basic steps to build and install perl 5 on a Unix system with all |
dd3196cd | 22 | the defaults are to run, from a freshly unpacked source tree: |
8e07c86e | 23 | |
491517e0 | 24 | sh Configure -de |
8e07c86e AD |
25 | make |
26 | make test | |
27 | make install | |
36477c24 | 28 | |
8e07c86e AD |
29 | Each of these is explained in further detail below. |
30 | ||
cc65bb49 AD |
31 | The above commands will install Perl to /usr/local (or some other |
32 | platform-specific directory -- see the appropriate file in hints/.) | |
7df75831 | 33 | If that's not okay with you, you can run Configure interactively, by |
ff52061e RGS |
34 | just typing "sh Configure" (without the -de args). You can also specify |
35 | any prefix location by adding "-Dprefix='/some/dir'" to Configure's args. | |
36 | To explicitly name the perl binary, use the command | |
37 | "make install PERLNAME=myperl". | |
491517e0 | 38 | |
668cbedd | 39 | Building perl from source requires an ANSI compliant C compiler. |
51eec7ec MB |
40 | A minimum of C89 is required. Some features available in C99 will |
41 | be probed for and used when found. The perl build process does not | |
42 | rely on anything more than C89. | |
43 | ||
ff52061e | 44 | These options, and many more, are explained in further detail below. |
7f678428 | 45 | |
e0ddbfb2 RS |
46 | If you're building perl from a git repository, you should also consult |
47 | the documentation in pod/perlgit.pod for information on that special | |
48 | circumstance. | |
49 | ||
8d74ce1c | 50 | If you have problems, corrections, or questions, please see |
ff52061e | 51 | L<"Reporting Problems"> below. |
8d74ce1c | 52 | |
7beaa944 | 53 | For information on what's new in this release, see the |
37ee6528 | 54 | pod/perldelta.pod file. For more information about how to find more |
9519d2ec | 55 | specific detail about changes, see the Changes file. |
c3edaffb | 56 | |
1ec51d55 | 57 | =head1 DESCRIPTION |
edb1cbcb | 58 | |
c3edaffb | 59 | This document is written in pod format as an easy way to indicate its |
60 | structure. The pod format is described in pod/perlpod.pod, but you can | |
1ec51d55 CS |
61 | read it as is with any pager or editor. Headings and items are marked |
62 | by lines beginning with '='. The other mark-up used is | |
63 | ||
64 | B<text> embolden text, used for switches, programs or commands | |
65 | C<code> literal code | |
66 | L<name> A link (cross reference) to name | |
ce80d64e | 67 | F<file> A filename |
1ec51d55 | 68 | |
c42e3e15 | 69 | Although most of the defaults are probably fine for most users, |
ce80d64e | 70 | you should probably at least skim through this document before |
1ec51d55 | 71 | proceeding. |
c3edaffb | 72 | |
ce80d64e AD |
73 | In addition to this file, check if there is a README file specific to |
74 | your operating system, since it may provide additional or different | |
75 | instructions for building Perl. If there is a hint file for your | |
dd3196cd RGS |
76 | system (in the hints/ directory) you might also want to read it |
77 | for even more information. | |
c42e3e15 | 78 | |
ce80d64e AD |
79 | For additional information about porting Perl, see the section on |
80 | L<"Porting information"> below, and look at the files in the Porting/ | |
81 | directory. | |
d56c5707 | 82 | |
ce80d64e | 83 | =head1 PRELIMINARIES |
c42e3e15 | 84 | |
ce80d64e | 85 | =head2 Changes and Incompatibilities |
c42e3e15 | 86 | |
37ee6528 | 87 | Please see pod/perldelta.pod for a description of the changes and |
ce80d64e AD |
88 | potential incompatibilities introduced with this release. A few of |
89 | the most important issues are listed below, but you should refer | |
37ee6528 | 90 | to pod/perldelta.pod for more detailed information. |
c42e3e15 | 91 | |
ab97e755 MB |
92 | B<WARNING:> This version is not binary compatible with earlier versions |
93 | of Perl. If you have built extensions (i.e. modules that include C code) | |
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94 | using an earlier version of Perl, you will need to rebuild and reinstall |
95 | those extensions. | |
1b1c1ae2 GS |
96 | |
97 | Pure perl modules without XS or C code should continue to work fine | |
dd3196cd | 98 | without reinstallation. See the discussion below on |
7df75831 | 99 | L<"Coexistence with earlier versions of perl 5"> for more details. |
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100 | |
101 | The standard extensions supplied with Perl will be handled automatically. | |
102 | ||
ce80d64e AD |
103 | On a related issue, old modules may possibly be affected by the changes |
104 | in the Perl language in the current release. Please see | |
37ee6528 | 105 | pod/perldelta.pod for a description of what's changed. See your |
ce80d64e | 106 | installed copy of the perllocal.pod file for a (possibly incomplete) |
c75cfcf0 FC |
107 | list of locally installed modules. Also see the L<CPAN> module's |
108 | C<autobundle> function for one way to make a "bundle" of your currently | |
109 | installed modules. | |
16dc217a | 110 | |
aa689395 | 111 | =head1 Run Configure |
8e07c86e AD |
112 | |
113 | Configure will figure out various things about your system. Some | |
114 | things Configure will figure out for itself, other things it will ask | |
d6baa268 JH |
115 | you about. To accept the default, just press RETURN. The default is |
116 | almost always okay. It is normal for some things to be "NOT found", | |
117 | since Configure often searches for many different ways of performing | |
118 | the same function. | |
119 | ||
ce80d64e | 120 | At any Configure prompt, you can type &-d and Configure will use the |
d6baa268 | 121 | defaults from then on. |
8e07c86e AD |
122 | |
123 | After it runs, Configure will perform variable substitution on all the | |
1ec51d55 | 124 | *.SH files and offer to run make depend. |
8e07c86e | 125 | |
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126 | The results of a Configure run are stored in the config.sh and Policy.sh |
127 | files. | |
128 | ||
ce80d64e | 129 | =head2 Common Configure options |
844fc9f4 | 130 | |
ce80d64e | 131 | Configure supports a number of useful options. Run |
844fc9f4 | 132 | |
ce80d64e | 133 | Configure -h |
d6baa268 | 134 | |
ce80d64e | 135 | to get a listing. See the Porting/Glossary file for a complete list of |
fb73857a | 136 | Configure variables you can set and their definitions. |
137 | ||
d6baa268 JH |
138 | =over 4 |
139 | ||
08854360 | 140 | =item C compiler |
d6baa268 | 141 | |
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142 | To compile with gcc, if it's not the default compiler on your |
143 | system, you should run | |
8e07c86e AD |
144 | |
145 | sh Configure -Dcc=gcc | |
146 | ||
08854360 | 147 | This is the preferred way to specify gcc (or any another alternative |
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148 | compiler) so that the hints files can set appropriate defaults. |
149 | ||
d6baa268 | 150 | =item Installation prefix |
4633a7c4 | 151 | |
8e07c86e | 152 | By default, for most systems, perl will be installed in |
8d74ce1c | 153 | /usr/local/{bin, lib, man}. (See L<"Installation Directories"> |
7df75831 | 154 | and L<"Coexistence with earlier versions of perl 5"> below for |
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155 | further details.) |
156 | ||
157 | You can specify a different 'prefix' for the default installation | |
ce80d64e | 158 | directory when Configure prompts you, or by using the Configure command |
8d74ce1c | 159 | line option -Dprefix='/some/directory', e.g. |
8e07c86e | 160 | |
25f94b33 | 161 | sh Configure -Dprefix=/opt/perl |
4633a7c4 | 162 | |
d6baa268 JH |
163 | If your prefix contains the string "perl", then the suggested |
164 | directory structure is simplified. For example, if you use | |
165 | prefix=/opt/perl, then Configure will suggest /opt/perl/lib instead of | |
166 | /opt/perl/lib/perl5/. Again, see L<"Installation Directories"> below | |
bc70e9ec JH |
167 | for more details. Do not include a trailing slash, (i.e. /opt/perl/) |
168 | or you may experience odd test failures. | |
8e07c86e | 169 | |
8d74ce1c AD |
170 | NOTE: You must not specify an installation directory that is the same |
171 | as or below your perl source directory. If you do, installperl will | |
172 | attempt infinite recursion. | |
84902520 | 173 | |
d6baa268 JH |
174 | =item /usr/bin/perl |
175 | ||
176 | It may seem obvious, but Perl is useful only when users can easily | |
177 | find it. It's often a good idea to have both /usr/bin/perl and | |
dd64f1c3 | 178 | /usr/local/bin/perl be symlinks to the actual binary. Be especially |
d6baa268 | 179 | careful, however, not to overwrite a version of perl supplied by your |
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180 | vendor unless you are sure you know what you are doing. If you insist |
181 | on replacing your vendor's perl, useful information on how it was | |
182 | configured may be found with | |
183 | ||
184 | perl -V:config_args | |
185 | ||
186 | (Check the output carefully, however, since this doesn't preserve | |
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187 | spaces in arguments to Configure. For that, you have to look carefully |
188 | at config_arg1, config_arg2, etc.) | |
d6baa268 | 189 | |
ce80d64e AD |
190 | By default, Configure will not try to link /usr/bin/perl to the current |
191 | version of perl. You can turn on that behavior by running | |
d6baa268 | 192 | |
7d56c962 | 193 | Configure -Dinstallusrbinperl |
d6baa268 | 194 | |
7d56c962 | 195 | or by answering 'yes' to the appropriate Configure prompt. |
d6baa268 | 196 | |
ce80d64e AD |
197 | In any case, system administrators are strongly encouraged to put |
198 | (symlinks to) perl and its accompanying utilities, such as perldoc, | |
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199 | into a directory typically found along a user's PATH, or in another |
200 | obvious and convenient place. | |
201 | ||
71c4561b | 202 | =item Building a development release |
04d420f9 | 203 | |
ce80d64e AD |
204 | For development releases (odd subreleases, like 5.9.x) if you want to |
205 | use Configure -d, you will also need to supply -Dusedevel to Configure, | |
206 | because the default answer to the question "do you really want to | |
207 | Configure a development version?" is "no". The -Dusedevel skips that | |
208 | sanity check. | |
d6baa268 JH |
209 | |
210 | =back | |
8e07c86e | 211 | |
203c3eec AD |
212 | If you are willing to accept all the defaults, and you want terse |
213 | output, you can run | |
214 | ||
215 | sh Configure -des | |
216 | ||
dd3196cd | 217 | =head2 Altering Configure variables for C compiler switches etc. |
46bb10fb | 218 | |
ce80d64e AD |
219 | For most users, most of the Configure defaults are fine, or can easily |
220 | be set on the Configure command line. However, if Configure doesn't | |
221 | have an option to do what you want, you can change Configure variables | |
222 | after the platform hints have been run by using Configure's -A switch. | |
223 | For example, here's how to add a couple of extra flags to C compiler | |
224 | invocations: | |
46bb10fb | 225 | |
08854360 | 226 | sh Configure -Accflags="-DPERL_EXTERNAL_GLOB -DNO_HASH_SEED" |
46bb10fb | 227 | |
5247441a | 228 | To clarify, those ccflags values are not Configure options; if passed to |
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229 | Configure directly, they won't do anything useful (they will define a |
230 | variable in config.sh, but without taking any action based upon it). | |
231 | But when passed to the compiler, those flags will activate #ifdefd code. | |
5247441a | 232 | |
ce80d64e | 233 | For more help on Configure switches, run |
46bb10fb | 234 | |
ce80d64e | 235 | sh Configure -h |
46bb10fb | 236 | |
ce80d64e | 237 | =head2 Major Configure-time Build Options |
46bb10fb | 238 | |
ce80d64e AD |
239 | There are several different ways to Configure and build perl for your |
240 | system. For most users, the defaults are sensible and will work. | |
241 | Some users, however, may wish to further customize perl. Here are | |
242 | some of the main things you can change. | |
46bb10fb | 243 | |
ce80d64e | 244 | =head3 Threads |
cc65bb49 | 245 | |
ce80d64e AD |
246 | On some platforms, perl can be compiled with support for threads. To |
247 | enable this, run | |
4633a7c4 | 248 | |
ce80d64e | 249 | sh Configure -Dusethreads |
4633a7c4 | 250 | |
ce80d64e | 251 | The default is to compile without thread support. |
cc65bb49 | 252 | |
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253 | Perl used to have two different internal threads implementations. The |
254 | current model (available internally since 5.6, and as a user-level module | |
255 | since 5.8) is called interpreter-based implementation (ithreads), with | |
256 | one interpreter per thread, and explicit sharing of data. The (deprecated) | |
257 | 5.005 version (5005threads) was removed for release 5.10. | |
d6baa268 | 258 | |
ce80d64e | 259 | The 'threads' module is for use with the ithreads implementation. The |
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260 | 'Thread' module emulates the old 5005threads interface on top of the |
261 | current ithreads model. | |
d6baa268 | 262 | |
ce80d64e AD |
263 | When using threads, perl uses a dynamically-sized buffer for some of |
264 | the thread-safe library calls, such as those in the getpw*() family. | |
265 | This buffer starts small, but it will keep growing until the result | |
266 | fits. To get a fixed upper limit, you should compile Perl with | |
267 | PERL_REENTRANT_MAXSIZE defined to be the number of bytes you want. One | |
268 | way to do this is to run Configure with | |
08854360 | 269 | C<-Accflags=-DPERL_REENTRANT_MAXSIZE=65536>. |
d6baa268 | 270 | |
08854360 | 271 | =head3 Large file support |
b367e8b0 | 272 | |
ce80d64e AD |
273 | Since Perl 5.6.0, Perl has supported large files (files larger than |
274 | 2 gigabytes), and in many common platforms like Linux or Solaris this | |
275 | support is on by default. | |
d6baa268 | 276 | |
ce80d64e | 277 | This is both good and bad. It is good in that you can use large files, |
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278 | seek(), stat(), and -s them. It is bad in that if you are interfacing |
279 | Perl using some extension, the components you are connecting to must also | |
ce80d64e AD |
280 | be large file aware: if Perl thinks files can be large but the other |
281 | parts of the software puzzle do not understand the concept, bad things | |
08854360 | 282 | will happen. |
d6baa268 | 283 | |
ce80d64e AD |
284 | There's also one known limitation with the current large files |
285 | implementation: unless you also have 64-bit integers (see the next | |
286 | section), you cannot use the printf/sprintf non-decimal integer formats | |
287 | like C<%x> to print filesizes. You can use C<%d>, though. | |
d6baa268 | 288 | |
71c4561b RGS |
289 | If you want to compile perl without large file support, use |
290 | ||
291 | sh Configure -Uuselargefiles | |
292 | ||
08854360 | 293 | =head3 64 bit support |
d6baa268 | 294 | |
08854360 RGS |
295 | If your platform does not run natively at 64 bits, but can simulate |
296 | them with compiler flags and/or C<long long> or C<int64_t>, | |
ce80d64e | 297 | you can build a perl that uses 64 bits. |
d6baa268 | 298 | |
ce80d64e AD |
299 | There are actually two modes of 64-bitness: the first one is achieved |
300 | using Configure -Duse64bitint and the second one using Configure | |
301 | -Duse64bitall. The difference is that the first one is minimal and | |
302 | the second one maximal. The first works in more places than the second. | |
d6baa268 | 303 | |
ce80d64e AD |
304 | The C<use64bitint> option does only as much as is required to get |
305 | 64-bit integers into Perl (this may mean, for example, using "long | |
306 | longs") while your memory may still be limited to 2 gigabytes (because | |
307 | your pointers could still be 32-bit). Note that the name C<64bitint> | |
308 | does not imply that your C compiler will be using 64-bit C<int>s (it | |
309 | might, but it doesn't have to). The C<use64bitint> simply means that | |
310 | you will be able to have 64 bit-wide scalar values. | |
d6baa268 | 311 | |
ce80d64e AD |
312 | The C<use64bitall> option goes all the way by attempting to switch |
313 | integers (if it can), longs (and pointers) to being 64-bit. This may | |
314 | create an even more binary incompatible Perl than -Duse64bitint: the | |
315 | resulting executable may not run at all in a 32-bit box, or you may | |
316 | have to reboot/reconfigure/rebuild your operating system to be 64-bit | |
317 | aware. | |
d6baa268 | 318 | |
08854360 | 319 | Natively 64-bit systems need neither -Duse64bitint nor -Duse64bitall. |
0e78eb44 MB |
320 | On these systems, it might be the default compilation mode, and there |
321 | is currently no guarantee that passing no use64bitall option to the | |
322 | Configure process will build a 32bit perl. Implementing -Duse32bit* | |
1ed7425e | 323 | options is planned for a future release of perl. |
d6baa268 | 324 | |
ce80d64e | 325 | =head3 Long doubles |
d6baa268 | 326 | |
ce80d64e AD |
327 | In some systems you may be able to use long doubles to enhance the |
328 | range and precision of your double precision floating point numbers | |
329 | (that is, Perl's numbers). Use Configure -Duselongdouble to enable | |
330 | this support (if it is available). | |
d6baa268 | 331 | |
aacf4ea2 JH |
332 | Note that the exact format and range of long doubles varies: |
333 | the most common is the x86 80-bit (64 bits of mantissa) format, | |
334 | but there are others, with different mantissa and exponent ranges. | |
335 | ||
ce80d64e | 336 | =head3 "more bits" |
b367e8b0 | 337 | |
ce80d64e AD |
338 | You can "Configure -Dusemorebits" to turn on both the 64-bit support |
339 | and the long double support. | |
b367e8b0 | 340 | |
257c99f5 JH |
341 | =head3 quadmath |
342 | ||
b7ce25dd | 343 | One option for more precision is that gcc 4.6 and later have a library |
257c99f5 JH |
344 | called quadmath, which implements the IEEE 754 quadruple precision |
345 | (128-bit, 113 bits of mantissa) floating point numbers. The library | |
346 | works at least on x86 and ia64 platforms. It may be part of your gcc | |
347 | installation, or you may need to install it separately. | |
348 | ||
79f6e7a5 JH |
349 | With "Configure -Dusequadmath" you can try enabling its use, but note |
350 | the compiler dependency, you may need to also add "-Dcc=...". | |
84e6cb05 | 351 | At C level the type is called C<__float128> (note, not "long double"), |
b7ce25dd | 352 | but Perl source knows it as NV. (This is not "long doubles".) |
257c99f5 | 353 | |
ce80d64e | 354 | =head3 Algorithmic Complexity Attacks on Hashes |
504f80c1 | 355 | |
e6b54db6 YO |
356 | Perl 5.18 reworked the measures used to secure its hash function |
357 | from algorithmic complexity attacks. By default it will build with | |
358 | all of these measures enabled along with support for controlling and | |
359 | disabling them via environment variables. | |
360 | ||
361 | You can override various aspects of this feature by defining various | |
362 | symbols during configure. An example might be: | |
363 | ||
364 | Configure -Accflags=-DPERL_HASH_FUNC_SIPHASH | |
365 | ||
366 | B<Unless stated otherwise these options are considered experimental or | |
367 | insecure and are not recommended for production use.> | |
368 | ||
369 | Perl 5.18 includes support for multiple hash functions, and changed | |
370 | the default (to ONE_AT_A_TIME_HARD), you can choose a different | |
371 | algorithm by defining one of the following symbols. Note that as of | |
372 | Perl 5.18 we can only recommend use of the default or SIPHASH. All | |
373 | the others are known to have security issues and are for research | |
374 | purposes only. | |
375 | ||
376 | PERL_HASH_FUNC_SIPHASH | |
377 | PERL_HASH_FUNC_SDBM | |
378 | PERL_HASH_FUNC_DJB2 | |
379 | PERL_HASH_FUNC_SUPERFAST | |
380 | PERL_HASH_FUNC_MURMUR3 | |
381 | PERL_HASH_FUNC_ONE_AT_A_TIME | |
382 | PERL_HASH_FUNC_ONE_AT_A_TIME_HARD | |
383 | PERL_HASH_FUNC_ONE_AT_A_TIME_OLD | |
384 | ||
385 | Perl 5.18 randomizes the order returned by keys(), values(), and each(), | |
386 | and allows controlling this behavior by using of the PERL_PERTURB_KEYS | |
387 | option. You can disable this option entirely with the define: | |
388 | ||
389 | PERL_PERTURB_KEYS_DISABLED | |
390 | ||
391 | You can disable the environment variable checks and specify the type of | |
392 | key traversal randomization to be used by defining one of these: | |
393 | ||
394 | PERL_PERTURB_KEYS_RANDOM | |
395 | PERL_PERTURB_KEYS_DETERMINISTIC | |
396 | ||
397 | In Perl 5.18 the seed used for the hash function is randomly selected | |
eb717850 | 398 | at process start which can be overridden by specifying a seed by setting |
e6b54db6 YO |
399 | the PERL_HASH_SEED environment variable. |
400 | ||
401 | You can change this behavior by building perl with the | |
402 | ||
403 | USE_HASH_SEED_EXPLICIT | |
404 | ||
405 | define, in which case one has to explicitly set the PERL_HASH_SEED | |
406 | environment variable to enable the security feature or by adding | |
407 | ||
408 | NO_HASH_SEED | |
409 | ||
410 | to the compilation flags to completely disable the randomisation feature. | |
411 | Note these modes are poorly tested, insecure and not recommended. | |
504f80c1 | 412 | |
3debabd9 | 413 | B<Perl has never guaranteed any ordering of the hash keys>, and the |
86358043 NC |
414 | ordering has already changed several times during the lifetime of Perl |
415 | 5. Also, the ordering of hash keys has always been, and continues to | |
08854360 | 416 | be, affected by the insertion order. Note that because of this |
86358043 | 417 | randomisation for example the Data::Dumper results will be different |
08854360 | 418 | between different runs of Perl, since Data::Dumper by default dumps |
86358043 NC |
419 | hashes "unordered". The use of the Data::Dumper C<Sortkeys> option is |
420 | recommended. | |
504f80c1 | 421 | |
ab97e755 MB |
422 | See L<perlrun/PERL_HASH_SEED> and L<perlrun/PERL_PERTURB_KEYS> for |
423 | details on the environment variables, and L<perlsec/Algorithmic | |
424 | Complexity Attacks> for further security details. | |
e6b54db6 | 425 | |
ce80d64e | 426 | =head3 SOCKS |
1b9c9cf5 DH |
427 | |
428 | Perl can be configured to be 'socksified', that is, to use the SOCKS | |
429 | TCP/IP proxy protocol library. SOCKS is used to give applications | |
430 | access to transport layer network proxies. Perl supports only SOCKS | |
71c4561b RGS |
431 | Version 5. The corresponding Configure option is -Dusesocks. |
432 | You can find more about SOCKS from wikipedia at | |
433 | L<http://en.wikipedia.org/wiki/SOCKS>. | |
1b9c9cf5 | 434 | |
ce80d64e | 435 | =head3 Dynamic Loading |
d6baa268 | 436 | |
71c4561b RGS |
437 | By default, Configure will compile perl to use dynamic loading. |
438 | If you want to force perl to be compiled completely | |
d6baa268 JH |
439 | statically, you can either choose this when Configure prompts you or |
440 | you can use the Configure command line option -Uusedl. | |
7df75831 RGS |
441 | With this option, you won't be able to use any new extension |
442 | (XS) module without recompiling perl itself. | |
d6baa268 | 443 | |
ce80d64e | 444 | =head3 Building a shared Perl library |
c3edaffb | 445 | |
446 | Currently, for most systems, the main perl executable is built by | |
447 | linking the "perl library" libperl.a with perlmain.o, your static | |
8ba4bff0 | 448 | extensions, and various extra libraries, such as -lm. |
c3edaffb | 449 | |
08854360 | 450 | On systems that support dynamic loading, it may be possible to |
9d67150a | 451 | replace libperl.a with a shared libperl.so. If you anticipate building |
c3edaffb | 452 | several different perl binaries (e.g. by embedding libperl into |
453 | different programs, or by using the optional compiler extension), then | |
9d67150a | 454 | you might wish to build a shared libperl.so so that all your binaries |
c3edaffb | 455 | can share the same library. |
456 | ||
457 | The disadvantages are that there may be a significant performance | |
9d67150a | 458 | penalty associated with the shared libperl.so, and that the overall |
aa689395 | 459 | mechanism is still rather fragile with respect to different versions |
c3edaffb | 460 | and upgrades. |
461 | ||
462 | In terms of performance, on my test system (Solaris 2.5_x86) the perl | |
9d67150a | 463 | test suite took roughly 15% longer to run with the shared libperl.so. |
c3edaffb | 464 | Your system and typical applications may well give quite different |
465 | results. | |
466 | ||
467 | The default name for the shared library is typically something like | |
08854360 | 468 | libperl.so.5.8.8 (for Perl 5.8.8), or libperl.so.588, or simply |
9d67150a | 469 | libperl.so. Configure tries to guess a sensible naming convention |
c3edaffb | 470 | based on your C library name. Since the library gets installed in a |
471 | version-specific architecture-dependent directory, the exact name | |
472 | isn't very important anyway, as long as your linker is happy. | |
473 | ||
c3edaffb | 474 | You can elect to build a shared libperl by |
475 | ||
ce80d64e AD |
476 | sh Configure -Duseshrplib |
477 | ||
478 | To build a shared libperl, the environment variable controlling shared | |
479 | library search (LD_LIBRARY_PATH in most systems, DYLD_LIBRARY_PATH for | |
f05550c0 | 480 | Darwin, LD_LIBRARY_PATH/SHLIB_PATH |
ce80d64e AD |
481 | for HP-UX, LIBPATH for AIX, PATH for Cygwin) must be set up to include |
482 | the Perl build directory because that's where the shared libperl will | |
483 | be created. Configure arranges makefile to have the correct shared | |
484 | library search settings. You can find the name of the environment | |
485 | variable Perl thinks works in your your system by | |
486 | ||
487 | grep ldlibpthname config.sh | |
488 | ||
489 | However, there are some special cases where manually setting the | |
490 | shared library path might be required. For example, if you want to run | |
491 | something like the following with the newly-built but not-yet-installed | |
492 | ./perl: | |
493 | ||
04bd6448 | 494 | ./perl -MTestInit t/misc/failing_test.t |
08854360 | 495 | |
ce80d64e | 496 | or |
08854360 | 497 | |
ce80d64e AD |
498 | ./perl -Ilib ~/my_mission_critical_test |
499 | ||
500 | then you need to set up the shared library path explicitly. | |
501 | You can do this with | |
502 | ||
503 | LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH | |
504 | ||
505 | for Bourne-style shells, or | |
506 | ||
507 | setenv LD_LIBRARY_PATH `pwd` | |
508 | ||
509 | for Csh-style shells. (This procedure may also be needed if for some | |
510 | unexpected reason Configure fails to set up makefile correctly.) (And | |
511 | again, it may be something other than LD_LIBRARY_PATH for you, see above.) | |
512 | ||
513 | You can often recognize failures to build/use a shared libperl from error | |
514 | messages complaining about a missing libperl.so (or libperl.sl in HP-UX), | |
515 | for example: | |
08854360 RGS |
516 | |
517 | 18126:./miniperl: /sbin/loader: Fatal Error: cannot map libperl.so | |
ce80d64e AD |
518 | |
519 | There is also an potential problem with the shared perl library if you | |
520 | want to have more than one "flavor" of the same version of perl (e.g. | |
521 | with and without -DDEBUGGING). For example, suppose you build and | |
08854360 RGS |
522 | install a standard Perl 5.10.0 with a shared library. Then, suppose you |
523 | try to build Perl 5.10.0 with -DDEBUGGING enabled, but everything else | |
ce80d64e AD |
524 | the same, including all the installation directories. How can you |
525 | ensure that your newly built perl will link with your newly built | |
526 | libperl.so.8 rather with the installed libperl.so.8? The answer is | |
527 | that you might not be able to. The installation directory is encoded | |
528 | in the perl binary with the LD_RUN_PATH environment variable (or | |
529 | equivalent ld command-line option). On Solaris, you can override that | |
530 | with LD_LIBRARY_PATH; on Linux, you can only override at runtime via | |
531 | LD_PRELOAD, specifying the exact filename you wish to be used; and on | |
532 | Digital Unix, you can override LD_LIBRARY_PATH by setting the | |
533 | _RLD_ROOT environment variable to point to the perl build directory. | |
534 | ||
535 | In other words, it is generally not a good idea to try to build a perl | |
536 | with a shared library if $archlib/CORE/$libperl already exists from a | |
537 | previous build. | |
538 | ||
539 | A good workaround is to specify a different directory for the | |
540 | architecture-dependent library for your -DDEBUGGING version of perl. | |
541 | You can do this by changing all the *archlib* variables in config.sh to | |
542 | point to your new architecture-dependent library. | |
543 | ||
575e1338 NC |
544 | =head3 Environment access |
545 | ||
ab97e755 MB |
546 | Perl often needs to write to the program's environment, such as when |
547 | C<%ENV> is assigned to. Many implementations of the C library function | |
548 | C<putenv()> leak memory, so where possible perl will manipulate the | |
549 | environment directly to avoid these leaks. The default is now to perform | |
550 | direct manipulation whenever perl is running as a stand alone interpreter, | |
551 | and to call the safe but potentially leaky C<putenv()> function when the | |
552 | perl interpreter is embedded in another application. You can force perl | |
553 | to always use C<putenv()> by compiling with | |
554 | C<-Accflags="-DPERL_USE_SAFE_PUTENV">, see section L</"Altering Configure | |
555 | variables for C compiler switches etc.">. You can force an embedded perl | |
556 | to use direct manipulation by setting C<PL_use_safe_putenv = 0;> after | |
557 | the C<perl_construct()> call. | |
575e1338 | 558 | |
ce80d64e AD |
559 | =head2 Installation Directories |
560 | ||
561 | The installation directories can all be changed by answering the | |
be8498a1 RGS |
562 | appropriate questions in Configure. For convenience, all the installation |
563 | questions are near the beginning of Configure. Do not include trailing | |
564 | slashes on directory names. At any point during the Configure process, | |
565 | you can answer a question with &-d and Configure will use the defaults | |
566 | from then on. Alternatively, you can | |
ce80d64e AD |
567 | |
568 | grep '^install' config.sh | |
569 | ||
570 | after Configure has run to verify the installation paths. | |
571 | ||
572 | The defaults are intended to be reasonable and sensible for most | |
573 | people building from sources. Those who build and distribute binary | |
574 | distributions or who export perl to a range of systems will probably | |
575 | need to alter them. If you are content to just accept the defaults, | |
576 | you can safely skip the next section. | |
577 | ||
578 | The directories set up by Configure fall into three broad categories. | |
579 | ||
580 | =over 4 | |
581 | ||
582 | =item Directories for the perl distribution | |
583 | ||
b95300a8 | 584 | By default, Configure will use the following directories for 5.23.8. |
ce80d64e | 585 | $version is the full perl version number, including subversion, e.g. |
8891dd8d | 586 | 5.12.3, and $archname is a string like sun4-sunos, |
ce80d64e AD |
587 | determined by Configure. The full definitions of all Configure |
588 | variables are in the file Porting/Glossary. | |
589 | ||
590 | Configure variable Default value | |
591 | $prefixexp /usr/local | |
592 | $binexp $prefixexp/bin | |
593 | $scriptdirexp $prefixexp/bin | |
594 | $privlibexp $prefixexp/lib/perl5/$version | |
595 | $archlibexp $prefixexp/lib/perl5/$version/$archname | |
596 | $man1direxp $prefixexp/man/man1 | |
597 | $man3direxp $prefixexp/man/man3 | |
598 | $html1direxp (none) | |
599 | $html3direxp (none) | |
600 | ||
ab97e755 MB |
601 | $prefixexp is generated from $prefix, with ~ expansion done to convert |
602 | home directories into absolute paths. Similarly for the other variables | |
603 | listed. As file system calls do not do this, you should always reference | |
604 | the ...exp variables, to support users who build perl in their home | |
605 | directory. | |
ce80d64e AD |
606 | |
607 | Actually, Configure recognizes the SVR3-style | |
608 | /usr/local/man/l_man/man1 directories, if present, and uses those | |
609 | instead. Also, if $prefix contains the string "perl", the library | |
610 | directories are simplified as described below. For simplicity, only | |
611 | the common style is shown here. | |
612 | ||
613 | =item Directories for site-specific add-on files | |
614 | ||
615 | After perl is installed, you may later wish to add modules (e.g. from | |
616 | CPAN) or scripts. Configure will set up the following directories to | |
617 | be used for installing those add-on modules and scripts. | |
618 | ||
979b4168 KW |
619 | Configure Default |
620 | variable value | |
621 | $siteprefixexp $prefixexp | |
622 | $sitebinexp $siteprefixexp/bin | |
623 | $sitescriptexp $siteprefixexp/bin | |
624 | $sitelibexp $siteprefixexp/lib/perl5/site_perl/$version | |
625 | $sitearchexp | |
626 | $siteprefixexp/lib/perl5/site_perl/$version/$archname | |
627 | $siteman1direxp $siteprefixexp/man/man1 | |
628 | $siteman3direxp $siteprefixexp/man/man3 | |
629 | $sitehtml1direxp (none) | |
630 | $sitehtml3direxp (none) | |
ce80d64e AD |
631 | |
632 | By default, ExtUtils::MakeMaker will install architecture-independent | |
633 | modules into $sitelib and architecture-dependent modules into $sitearch. | |
634 | ||
635 | =item Directories for vendor-supplied add-on files | |
636 | ||
637 | Lastly, if you are building a binary distribution of perl for | |
638 | distribution, Configure can optionally set up the following directories | |
639 | for you to use to distribute add-on modules. | |
640 | ||
979b4168 KW |
641 | Configure Default |
642 | variable value | |
643 | $vendorprefixexp (none) | |
644 | ||
645 | (The next ones are set only if vendorprefix is set.) | |
646 | ||
647 | $vendorbinexp $vendorprefixexp/bin | |
648 | $vendorscriptexp $vendorprefixexp/bin | |
649 | $vendorlibexp $vendorprefixexp/lib/perl5/vendor_perl/$version | |
650 | $vendorarchexp | |
651 | $vendorprefixexp/lib/perl5/vendor_perl/$version/$archname | |
652 | $vendorman1direxp $vendorprefixexp/man/man1 | |
653 | $vendorman3direxp $vendorprefixexp/man/man3 | |
654 | $vendorhtml1direxp (none) | |
655 | $vendorhtml3direxp (none) | |
ce80d64e AD |
656 | |
657 | These are normally empty, but may be set as needed. For example, | |
658 | a vendor might choose the following settings: | |
659 | ||
979b4168 KW |
660 | $prefix /usr |
661 | $siteprefix /usr/local | |
662 | $vendorprefix /usr | |
ce80d64e AD |
663 | |
664 | This would have the effect of setting the following: | |
665 | ||
979b4168 KW |
666 | $binexp /usr/bin |
667 | $scriptdirexp /usr/bin | |
668 | $privlibexp /usr/lib/perl5/$version | |
669 | $archlibexp /usr/lib/perl5/$version/$archname | |
670 | $man1direxp /usr/man/man1 | |
671 | $man3direxp /usr/man/man3 | |
672 | ||
673 | $sitebinexp /usr/local/bin | |
674 | $sitescriptexp /usr/local/bin | |
675 | $sitelibexp /usr/local/lib/perl5/site_perl/$version | |
676 | $sitearchexp /usr/local/lib/perl5/site_perl/$version/$archname | |
677 | $siteman1direxp /usr/local/man/man1 | |
678 | $siteman3direxp /usr/local/man/man3 | |
679 | ||
680 | $vendorbinexp /usr/bin | |
681 | $vendorscriptexp /usr/bin | |
682 | $vendorlibexp /usr/lib/perl5/vendor_perl/$version | |
683 | $vendorarchexp /usr/lib/perl5/vendor_perl/$version/$archname | |
684 | $vendorman1direxp /usr/man/man1 | |
685 | $vendorman3direxp /usr/man/man3 | |
ce80d64e AD |
686 | |
687 | Note how in this example, the vendor-supplied directories are in the | |
668cbedd | 688 | /usr hierarchy, while the directories reserved for the end user are in |
ce80d64e AD |
689 | the /usr/local hierarchy. |
690 | ||
691 | The entire installed library hierarchy is installed in locations with | |
692 | version numbers, keeping the installations of different versions distinct. | |
ab97e755 MB |
693 | However, later installations of Perl can still be configured to search |
694 | the installed libraries corresponding to compatible earlier versions. | |
695 | See L<"Coexistence with earlier versions of perl 5"> below for more | |
696 | details on how Perl can be made to search older version directories. | |
ce80d64e AD |
697 | |
698 | Of course you may use these directories however you see fit. For | |
699 | example, you may wish to use $siteprefix for site-specific files that | |
700 | are stored locally on your own disk and use $vendorprefix for | |
701 | site-specific files that are stored elsewhere on your organization's | |
702 | network. One way to do that would be something like | |
703 | ||
979b4168 | 704 | sh Configure -Dsiteprefix=/usr/local -Dvendorprefix=/usr/share/perl |
ce80d64e AD |
705 | |
706 | =item otherlibdirs | |
707 | ||
708 | As a final catch-all, Configure also offers an $otherlibdirs | |
709 | variable. This variable contains a colon-separated list of additional | |
710 | directories to add to @INC. By default, it will be empty. | |
711 | Perl will search these directories (including architecture and | |
712 | version-specific subdirectories) for add-on modules and extensions. | |
713 | ||
714 | For example, if you have a bundle of perl libraries from a previous | |
715 | installation, perhaps in a strange place: | |
716 | ||
717 | Configure -Dotherlibdirs=/usr/lib/perl5/site_perl/5.8.1 | |
718 | ||
719 | =item APPLLIB_EXP | |
720 | ||
721 | There is one other way of adding paths to @INC at perl build time, and | |
722 | that is by setting the APPLLIB_EXP C pre-processor token to a colon- | |
723 | separated list of directories, like this | |
724 | ||
725 | sh Configure -Accflags='-DAPPLLIB_EXP=\"/usr/libperl\"' | |
726 | ||
727 | The directories defined by APPLLIB_EXP get added to @INC I<first>, | |
728 | ahead of any others, and so provide a way to override the standard perl | |
729 | modules should you, for example, want to distribute fixes without | |
730 | touching the perl distribution proper. And, like otherlib dirs, | |
731 | version and architecture specific subdirectories are also searched, if | |
732 | present, at run time. Of course, you can still search other @INC | |
733 | directories ahead of those in APPLLIB_EXP by using any of the standard | |
734 | run-time methods: $PERLLIB, $PERL5LIB, -I, use lib, etc. | |
735 | ||
785aa5e3 | 736 | =item usesitecustomize |
20ef40cf GA |
737 | |
738 | Run-time customization of @INC can be enabled with: | |
739 | ||
36de116d | 740 | sh Configure -Dusesitecustomize |
20ef40cf | 741 | |
785aa5e3 RGS |
742 | which will define USE_SITECUSTOMIZE and $Config{usesitecustomize}. |
743 | When enabled, this makes perl run F<$sitelibexp/sitecustomize.pl> before | |
20ef40cf GA |
744 | anything else. This script can then be set up to add additional |
745 | entries to @INC. | |
746 | ||
ce80d64e AD |
747 | =item Man Pages |
748 | ||
be8498a1 RGS |
749 | By default, man pages will be installed in $man1dir and $man3dir, which |
750 | are normally /usr/local/man/man1 and /usr/local/man/man3. If you | |
751 | want to use a .3pm suffix for perl man pages, you can do that with | |
ce80d64e AD |
752 | |
753 | sh Configure -Dman3ext=3pm | |
754 | ||
ce80d64e AD |
755 | =item HTML pages |
756 | ||
757 | Currently, the standard perl installation does not do anything with | |
758 | HTML documentation, but that may change in the future. Further, some | |
759 | add-on modules may wish to install HTML documents. The html Configure | |
760 | variables listed above are provided if you wish to specify where such | |
761 | documents should be placed. The default is "none", but will likely | |
762 | eventually change to something useful based on user feedback. | |
763 | ||
764 | =back | |
765 | ||
766 | Some users prefer to append a "/share" to $privlib and $sitelib | |
767 | to emphasize that those directories can be shared among different | |
768 | architectures. | |
769 | ||
770 | Note that these are just the defaults. You can actually structure the | |
771 | directories any way you like. They don't even have to be on the same | |
772 | filesystem. | |
c3edaffb | 773 | |
ce80d64e AD |
774 | Further details about the installation directories, maintenance and |
775 | development subversions, and about supporting multiple versions are | |
7df75831 | 776 | discussed in L<"Coexistence with earlier versions of perl 5"> below. |
10c7e831 | 777 | |
ce80d64e AD |
778 | If you specify a prefix that contains the string "perl", then the |
779 | library directory structure is slightly simplified. Instead of | |
780 | suggesting $prefix/lib/perl5/, Configure will suggest $prefix/lib. | |
2bf2710f | 781 | |
ce80d64e AD |
782 | Thus, for example, if you Configure with |
783 | -Dprefix=/opt/perl, then the default library directories for 5.9.0 are | |
2bf2710f | 784 | |
ce80d64e AD |
785 | Configure variable Default value |
786 | $privlib /opt/perl/lib/5.9.0 | |
787 | $archlib /opt/perl/lib/5.9.0/$archname | |
788 | $sitelib /opt/perl/lib/site_perl/5.9.0 | |
789 | $sitearch /opt/perl/lib/site_perl/5.9.0/$archname | |
2bf2710f | 790 | |
ce80d64e | 791 | =head2 Changing the installation directory |
c3edaffb | 792 | |
ce80d64e | 793 | Configure distinguishes between the directory in which perl (and its |
7df75831 | 794 | associated files) should be installed, and the directory in which it |
ce80d64e AD |
795 | will eventually reside. For most sites, these two are the same; for |
796 | sites that use AFS, this distinction is handled automatically. | |
7df75831 RGS |
797 | However, sites that use package management software such as rpm or |
798 | dpkg, or users building binary packages for distribution may also | |
799 | wish to install perl into a different directory before moving perl | |
800 | to its final destination. There are two ways to do that: | |
801 | ||
802 | =over 4 | |
803 | ||
804 | =item installprefix | |
c3edaffb | 805 | |
be8498a1 RGS |
806 | To install perl under the /tmp/perl5 directory, use the following |
807 | command line: | |
c3edaffb | 808 | |
7df75831 | 809 | sh Configure -Dinstallprefix=/tmp/perl5 |
c3edaffb | 810 | |
ce80d64e | 811 | (replace /tmp/perl5 by a directory of your choice). |
2bf2710f | 812 | |
ce80d64e AD |
813 | Beware, though, that if you go to try to install new add-on |
814 | modules, they too will get installed in under '/tmp/perl5' if you | |
7df75831 RGS |
815 | follow this example. That's why it's usually better to use DESTDIR, |
816 | as shown in the next section. | |
c3edaffb | 817 | |
7df75831 | 818 | =item DESTDIR |
9d67150a | 819 | |
ce80d64e AD |
820 | If you need to install perl on many identical systems, it is convenient |
821 | to compile it once and create an archive that can be installed on | |
822 | multiple systems. Suppose, for example, that you want to create an | |
823 | archive that can be installed in /opt/perl. One way to do that is by | |
824 | using the DESTDIR variable during C<make install>. The DESTDIR is | |
825 | automatically prepended to all the installation paths. Thus you | |
826 | simply do: | |
830717a7 | 827 | |
ce80d64e AD |
828 | sh Configure -Dprefix=/opt/perl -des |
829 | make | |
830 | make test | |
831 | make install DESTDIR=/tmp/perl5 | |
832 | cd /tmp/perl5/opt/perl | |
833 | tar cvf /tmp/perl5-archive.tar . | |
9d67150a | 834 | |
7df75831 RGS |
835 | =back |
836 | ||
32878f30 NP |
837 | =head2 Relocatable @INC |
838 | ||
839 | To create a relocatable perl tree, use the following command line: | |
840 | ||
841 | sh Configure -Duserelocatableinc | |
842 | ||
843 | Then the paths in @INC (and everything else in %Config) can be | |
844 | optionally located via the path of the perl executable. | |
845 | ||
846 | That means that, if the string ".../" is found at the start of any | |
847 | path, it's substituted with the directory of $^X. So, the relocation | |
848 | can be configured on a per-directory basis, although the default with | |
849 | "-Duserelocatableinc" is that everything is relocated. The initial | |
850 | install is done to the original configured prefix. | |
851 | ||
79f7885c RGS |
852 | This option is not compatible with the building of a shared libperl |
853 | ("-Duseshrplib"), because in that case perl is linked with an hard-coded | |
854 | rpath that points at the libperl.so, that cannot be relocated. | |
855 | ||
ce80d64e | 856 | =head2 Site-wide Policy settings |
55479bb6 | 857 | |
ce80d64e | 858 | After Configure runs, it stores a number of common site-wide "policy" |
7df75831 RGS |
859 | answers (such as installation directories) in the Policy.sh file. |
860 | If you want to build perl on another system using the same policy | |
861 | defaults, simply copy the Policy.sh file to the new system's perl build | |
862 | directory, and Configure will use it. This will work even if Policy.sh was | |
a0a8d9d3 | 863 | generated for another version of Perl, or on a system with a |
da1b4322 | 864 | different architecture and/or operating system. However, in such cases, |
a0a8d9d3 DD |
865 | you should review the contents of the file before using it: for |
866 | example, your new target may not keep its man pages in the same place | |
867 | as the system on which the file was generated. | |
55479bb6 | 868 | |
ce80d64e AD |
869 | Alternatively, if you wish to change some or all of those policy |
870 | answers, you should | |
c3edaffb | 871 | |
ce80d64e | 872 | rm -f Policy.sh |
aa689395 | 873 | |
ce80d64e | 874 | to ensure that Configure doesn't re-use them. |
2ae324a7 | 875 | |
ce80d64e | 876 | Further information is in the Policy_sh.SH file itself. |
aa689395 | 877 | |
ce80d64e AD |
878 | If the generated Policy.sh file is unsuitable, you may freely edit it |
879 | to contain any valid shell commands. It will be run just after the | |
880 | platform-specific hints files. | |
aa689395 | 881 | |
ce80d64e | 882 | =head2 Disabling older versions of Perl |
aa689395 | 883 | |
ce80d64e | 884 | Configure will search for binary compatible versions of previously |
7df75831 RGS |
885 | installed perl binaries in the tree that is specified as target tree, |
886 | and these will be used as locations to search for modules by the perl | |
887 | being built. The list of perl versions found will be put in the Configure | |
888 | variable inc_version_list. | |
86058a2d | 889 | |
ab97e755 MB |
890 | To disable this use of older perl modules, even completely valid pure |
891 | perl modules, you can specify to not include the paths found: | |
b2a6d19e | 892 | |
ce80d64e | 893 | sh Configure -Dinc_version_list=none ... |
d6baa268 | 894 | |
ab97e755 MB |
895 | If you do want to use modules from some previous perl versions, the |
896 | variable must contain a space separated list of directories under the | |
897 | site_perl directory, and has to include architecture-dependent | |
898 | directories separately, eg. | |
274ca399 | 899 | |
4683a5d7 | 900 | sh Configure -Dinc_version_list="5.16.0/x86_64-linux 5.16.0" ... |
274ca399 | 901 | |
ce80d64e | 902 | When using the newer perl, you can add these paths again in the |
668cbedd | 903 | PERL5LIB environment variable or with perl's -I runtime option. |
86058a2d | 904 | |
ce80d64e | 905 | =head2 Building Perl outside of the source directory |
86058a2d | 906 | |
ce80d64e AD |
907 | Sometimes it is desirable to build Perl in a directory different from |
908 | where the sources are, for example if you want to keep your sources | |
909 | read-only, or if you want to share the sources between different binary | |
910 | architectures. You can do this (if your file system supports symbolic | |
911 | links) by | |
06c896bb | 912 | |
ce80d64e AD |
913 | mkdir /tmp/perl/build/directory |
914 | cd /tmp/perl/build/directory | |
915 | sh /path/to/perl/source/Configure -Dmksymlinks ... | |
06c896bb | 916 | |
ce80d64e AD |
917 | This will create in /tmp/perl/build/directory a tree of symbolic links |
918 | pointing to files in /path/to/perl/source. The original files are left | |
919 | unaffected. After Configure has finished you can just say | |
06c896bb | 920 | |
ce80d64e | 921 | make |
7df75831 RGS |
922 | make test |
923 | make install | |
06c896bb | 924 | |
ce80d64e | 925 | as usual, and Perl will be built in /tmp/perl/build/directory. |
aa689395 | 926 | |
3bf462b8 CS |
927 | =head2 Building a debugging perl |
928 | ||
929 | You can run perl scripts under the perl debugger at any time with | |
3fe9a6f1 | 930 | B<perl -d your_script>. If, however, you want to debug perl itself, |
eaf812ae MB |
931 | you probably want to have support for perl internal debugging code |
932 | (activated by adding -DDEBUGGING to ccflags), and/or support for the | |
7df75831 RGS |
933 | system debugger by adding -g to the optimisation flags. For that, |
934 | use the parameter: | |
eaf812ae | 935 | |
08854360 RGS |
936 | sh Configure -DDEBUGGING |
937 | ||
938 | or | |
939 | ||
eaf812ae MB |
940 | sh Configure -DDEBUGGING=<mode> |
941 | ||
942 | For a more eye appealing call, -DEBUGGING is defined to be an alias | |
943 | for -DDEBUGGING. For both, the -U calls are also supported, in order | |
944 | to be able to overrule the hints or Policy.sh settings. | |
945 | ||
7df75831 | 946 | Here are the DEBUGGING modes: |
3bf462b8 | 947 | |
7df75831 | 948 | =over 4 |
3bf462b8 | 949 | |
eaf812ae MB |
950 | =item -DDEBUGGING |
951 | ||
952 | =item -DEBUGGING | |
953 | ||
954 | =item -DEBUGGING=both | |
955 | ||
7df75831 RGS |
956 | Sets both -DDEBUGGING in the ccflags, and adds -g to optimize. |
957 | ||
958 | You can actually specify -g and -DDEBUGGING independently (see below), | |
959 | but usually it's convenient to have both. | |
eaf812ae MB |
960 | |
961 | =item -DEBUGGING=-g | |
962 | ||
7df75831 RGS |
963 | =item -Doptimize=-g |
964 | ||
eaf812ae MB |
965 | Adds -g to optimize, but does not set -DDEBUGGING. |
966 | ||
7df75831 RGS |
967 | (Note: Your system may actually require something like cc -g2. |
968 | Check your man pages for cc(1) and also any hint file for your system.) | |
969 | ||
eaf812ae MB |
970 | =item -DEBUGGING=none |
971 | ||
7df75831 RGS |
972 | =item -UDEBUGGING |
973 | ||
eaf812ae MB |
974 | Removes -g from optimize, and -DDEBUGGING from ccflags. |
975 | ||
976 | =back | |
977 | ||
3bf462b8 | 978 | If you are using a shared libperl, see the warnings about multiple |
a522f097 | 979 | versions of perl under L<Building a shared Perl library>. |
3bf462b8 | 980 | |
def5f8a5 DM |
981 | Note that a perl built with -DDEBUGGING will be much bigger and will run |
982 | much, much more slowly than a standard perl. | |
1db12997 DM |
983 | |
984 | =head2 DTrace support | |
985 | ||
979b4168 | 986 | On platforms where DTrace is available, it may be enabled by |
ab97e755 MB |
987 | using the -Dusedtrace option to Configure. DTrace probes are available |
988 | for subroutine entry (sub-entry) and subroutine exit (sub-exit). Here's a | |
1db12997 DM |
989 | simple D script that uses them: |
990 | ||
991 | perl$target:::sub-entry, perl$target:::sub-return { | |
992 | printf("%s %s (%s:%d)\n", probename == "sub-entry" ? "->" : "<-", | |
993 | copyinstr(arg0), copyinstr(arg1), arg2); | |
994 | } | |
995 | ||
996 | ||
8d74ce1c AD |
997 | =head2 Extensions |
998 | ||
80c1f5de AD |
999 | Perl ships with a number of standard extensions. These are contained |
1000 | in the ext/ subdirectory. | |
1001 | ||
8d74ce1c AD |
1002 | By default, Configure will offer to build every extension which appears |
1003 | to be supported. For example, Configure will offer to build GDBM_File | |
7df75831 | 1004 | only if it is able to find the gdbm library. |
ce80d64e AD |
1005 | |
1006 | To disable certain extensions so that they are not built, use the | |
1007 | -Dnoextensions=... and -Donlyextensions=... options. They both accept | |
47bd56ab DM |
1008 | a space-separated list of extensions, such as C<IPC/SysV>. The extensions |
1009 | listed in | |
ce80d64e AD |
1010 | C<noextensions> are removed from the list of extensions to build, while |
1011 | the C<onlyextensions> is rather more severe and builds only the listed | |
1012 | extensions. The latter should be used with extreme caution since | |
1013 | certain extensions are used by many other extensions and modules: | |
1014 | examples of such modules include Fcntl and IO. The order of processing | |
1015 | these options is first C<only> (if present), then C<no> (if present). | |
8d74ce1c AD |
1016 | |
1017 | Of course, you may always run Configure interactively and select only | |
1018 | the extensions you want. | |
1019 | ||
7df75831 RGS |
1020 | If you unpack any additional extensions in the ext/ directory before |
1021 | running Configure, then Configure will offer to build those additional | |
1022 | extensions as well. Most users probably shouldn't have to do this -- | |
1023 | it is usually easier to build additional extensions later after perl | |
1024 | has been installed. However, if you wish to have those additional | |
1025 | extensions statically linked into the perl binary, then this offers a | |
1026 | convenient way to do that in one step. (It is not necessary, however; | |
1027 | you can build and install extensions just fine even if you don't have | |
1028 | dynamic loading. See lib/ExtUtils/MakeMaker.pm for more details.) | |
1029 | Another way of specifying extra modules is described in | |
1030 | L<"Adding extra modules to the build"> below. | |
8d74ce1c | 1031 | |
dd3196cd | 1032 | If you re-use an old config.sh but change your system (e.g. by |
8d74ce1c AD |
1033 | adding libgdbm) Configure will still offer your old choices of extensions |
1034 | for the default answer, but it will also point out the discrepancy to | |
1035 | you. | |
1036 | ||
8d74ce1c AD |
1037 | =head2 Including locally-installed libraries |
1038 | ||
7df75831 RGS |
1039 | Perl comes with interfaces to number of libraries, including threads, |
1040 | dbm, ndbm, gdbm, and Berkeley db. For the *db* extension, if | |
8d74ce1c | 1041 | Configure can find the appropriate header files and libraries, it will |
7df75831 | 1042 | automatically include that extension. The threading extension needs |
27021420 | 1043 | to be specified explicitly (see L</Threads>). |
7df75831 RGS |
1044 | |
1045 | Those libraries are not distributed with perl. If your header (.h) files | |
1046 | for those libraries are not in a directory normally searched by your C | |
1047 | compiler, then you will need to include the appropriate -I/your/directory | |
1048 | option when prompted by Configure. If your libraries are not in a | |
1049 | directory normally searched by your C compiler and linker, then you will | |
1050 | need to include the appropriate -L/your/directory option when prompted | |
1051 | by Configure. See the examples below. | |
8d74ce1c | 1052 | |
ce80d64e | 1053 | =head3 Examples |
8d74ce1c AD |
1054 | |
1055 | =over 4 | |
1056 | ||
1057 | =item gdbm in /usr/local | |
1058 | ||
1059 | Suppose you have gdbm and want Configure to find it and build the | |
d6baa268 | 1060 | GDBM_File extension. This example assumes you have gdbm.h |
8d74ce1c AD |
1061 | installed in /usr/local/include/gdbm.h and libgdbm.a installed in |
1062 | /usr/local/lib/libgdbm.a. Configure should figure all the | |
1063 | necessary steps out automatically. | |
1064 | ||
1065 | Specifically, when Configure prompts you for flags for | |
7df75831 RGS |
1066 | your C compiler, you should include -I/usr/local/include, if it's |
1067 | not here yet. Similarly, when Configure prompts you for linker flags, | |
1068 | you should include -L/usr/local/lib. | |
8d74ce1c AD |
1069 | |
1070 | If you are using dynamic loading, then when Configure prompts you for | |
1071 | linker flags for dynamic loading, you should again include | |
1072 | -L/usr/local/lib. | |
1073 | ||
d6baa268 JH |
1074 | Again, this should all happen automatically. This should also work if |
1075 | you have gdbm installed in any of (/usr/local, /opt/local, /usr/gnu, | |
1076 | /opt/gnu, /usr/GNU, or /opt/GNU). | |
8d74ce1c | 1077 | |
e8b9ce60 AD |
1078 | =item BerkeleyDB in /usr/local/BerkeleyDB |
1079 | ||
668cbedd | 1080 | The version of BerkeleyDB distributed by Oracle installs in a |
e8b9ce60 AD |
1081 | version-specific directory by default, typically something like |
1082 | /usr/local/BerkeleyDB.4.7. To have Configure find that, you need to add | |
ab97e755 MB |
1083 | -I/usr/local/BerkeleyDB.4.7/include to cc flags, as in the previous |
1084 | example, and you will also have to take extra steps to help Configure | |
1085 | find -ldb. Specifically, when Configure prompts you for library | |
1086 | directories, add /usr/local/BerkeleyDB.4.7/lib to the list. Also, you | |
1087 | will need to add appropriate linker flags to tell the runtime linker | |
1088 | where to find the BerkeleyDB shared libraries. | |
e8b9ce60 AD |
1089 | |
1090 | It is possible to specify this from the command line (all on one | |
8d74ce1c AD |
1091 | line): |
1092 | ||
979b4168 KW |
1093 | sh Configure -de \ |
1094 | -Dlocincpth='/usr/local/BerkeleyDB.4.7/include \ | |
1095 | /usr/local/include' \ | |
1096 | -Dloclibpth='/usr/local/BerkeleyDB.4.7/lib /usr/local/lib' \ | |
1097 | -Aldflags='-R/usr/local/BerkeleyDB.4.7/lib' | |
8d74ce1c AD |
1098 | |
1099 | locincpth is a space-separated list of include directories to search. | |
1100 | Configure will automatically add the appropriate -I directives. | |
1101 | ||
1102 | loclibpth is a space-separated list of library directories to search. | |
e8b9ce60 | 1103 | Configure will automatically add the appropriate -L directives. |
8d74ce1c | 1104 | |
e8b9ce60 AD |
1105 | The addition to ldflags is so that the dynamic linker knows where to find |
1106 | the BerkeleyDB libraries. For Linux and Solaris, the -R option does that. | |
1107 | Other systems may use different flags. Use the appropriate flag for your | |
1108 | system. | |
8d74ce1c AD |
1109 | |
1110 | =back | |
1111 | ||
b76ca5cc BF |
1112 | =head2 Specifying a logical root directory |
1113 | ||
1114 | If you are cross-compiling, or are using a compiler which has it's own | |
1115 | headers and libraries in a nonstandard location, and your compiler | |
ab97e755 MB |
1116 | understands the C<--sysroot> option, you can use the C<-Dsysroot> option |
1117 | to specify the logical root directory under which all libraries and | |
1118 | headers are searched for. This patch adjusts Configure to search under | |
1119 | $sysroot, instead of /. | |
1120 | ||
b76ca5cc BF |
1121 | --sysroot is added to ccflags and friends so that make in |
1122 | ExtUtils::MakeMaker, and other extensions, will use it. | |
1123 | ||
ce80d64e AD |
1124 | =head2 Overriding an old config.sh |
1125 | ||
dd3196cd RGS |
1126 | If you want to use an old config.sh produced by a previous run of |
1127 | Configure, but override some of the items with command line options, you | |
1128 | need to use B<Configure -O>. | |
ce80d64e AD |
1129 | |
1130 | =head2 GNU-style configure | |
1131 | ||
1132 | If you prefer the GNU-style configure command line interface, you can | |
1133 | use the supplied configure.gnu command, e.g. | |
1134 | ||
1135 | CC=gcc ./configure.gnu | |
1136 | ||
1137 | The configure.gnu script emulates a few of the more common configure | |
1138 | options. Try | |
1139 | ||
1140 | ./configure.gnu --help | |
1141 | ||
1142 | for a listing. | |
1143 | ||
1144 | (The file is called configure.gnu to avoid problems on systems | |
1145 | that would not distinguish the files "Configure" and "configure".) | |
1146 | ||
ce80d64e AD |
1147 | =head2 Malloc Issues |
1148 | ||
1149 | Perl relies heavily on malloc(3) to grow data structures as needed, | |
1150 | so perl's performance can be noticeably affected by the performance of | |
1151 | the malloc function on your system. The perl source is shipped with a | |
1152 | version of malloc that has been optimized for the typical requests from | |
1153 | perl, so there's a chance that it may be both faster and use less memory | |
1154 | than your system malloc. | |
1155 | ||
1156 | However, if your system already has an excellent malloc, or if you are | |
1157 | experiencing difficulties with extensions that use third-party libraries | |
1158 | that call malloc, then you should probably use your system's malloc. | |
1159 | (Or, you might wish to explore the malloc flags discussed below.) | |
1160 | ||
1161 | =over 4 | |
1162 | ||
1163 | =item Using the system malloc | |
1164 | ||
1165 | To build without perl's malloc, you can use the Configure command | |
1166 | ||
1167 | sh Configure -Uusemymalloc | |
1168 | ||
1169 | or you can answer 'n' at the appropriate interactive Configure prompt. | |
1170 | ||
73d6d1b0 RGS |
1171 | Note that Perl's malloc isn't always used by default; that actually |
1172 | depends on your system. For example, on Linux and FreeBSD (and many more | |
1173 | systems), Configure chooses to use the system's malloc by default. | |
1174 | See the appropriate file in the F<hints/> directory to see how the | |
1175 | default is set. | |
1176 | ||
ce80d64e AD |
1177 | =item -DPERL_POLLUTE_MALLOC |
1178 | ||
1179 | NOTE: This flag is enabled automatically on some platforms if you just | |
7df75831 | 1180 | run Configure to accept all the defaults. |
ce80d64e AD |
1181 | |
1182 | Perl's malloc family of functions are normally called Perl_malloc(), | |
1183 | Perl_realloc(), Perl_calloc() and Perl_mfree(). | |
1184 | These names do not clash with the system versions of these functions. | |
1185 | ||
1186 | If this flag is enabled, however, Perl's malloc family of functions | |
1187 | will have the same names as the system versions. This may be required | |
1188 | sometimes if you have libraries that like to free() data that may have | |
1189 | been allocated by Perl_malloc() and vice versa. | |
1190 | ||
1191 | Note that enabling this option may sometimes lead to duplicate symbols | |
1192 | from the linker for malloc et al. In such cases, the system probably | |
1193 | does not allow its malloc functions to be fully replaced with custom | |
1194 | versions. | |
1195 | ||
1196 | =item -DPERL_DEBUGGING_MSTATS | |
1197 | ||
1198 | This flag enables debugging mstats, which is required to use the | |
1199 | Devel::Peek::mstat() function. You cannot enable this unless you are | |
1200 | using Perl's malloc, so a typical Configure command would be | |
1201 | ||
7df75831 | 1202 | sh Configure -Accflags=-DPERL_DEBUGGING_MSTATS -Dusemymalloc |
ce80d64e AD |
1203 | |
1204 | to enable this option. | |
1205 | ||
1206 | =back | |
1207 | ||
8e07c86e AD |
1208 | =head2 What if it doesn't work? |
1209 | ||
8d74ce1c | 1210 | If you run into problems, try some of the following ideas. |
ff52061e | 1211 | If none of them help, then see L<"Reporting Problems"> below. |
8d74ce1c | 1212 | |
8e07c86e AD |
1213 | =over 4 |
1214 | ||
25f94b33 AD |
1215 | =item Running Configure Interactively |
1216 | ||
1217 | If Configure runs into trouble, remember that you can always run | |
1218 | Configure interactively so that you can check (and correct) its | |
1219 | guesses. | |
1220 | ||
1221 | All the installation questions have been moved to the top, so you don't | |
aa689395 | 1222 | have to wait for them. Once you've handled them (and your C compiler and |
1ec51d55 | 1223 | flags) you can type &-d at the next Configure prompt and Configure |
25f94b33 AD |
1224 | will use the defaults from then on. |
1225 | ||
1226 | If you find yourself trying obscure command line incantations and | |
1227 | config.over tricks, I recommend you run Configure interactively | |
1228 | instead. You'll probably save yourself time in the long run. | |
1229 | ||
aa689395 | 1230 | =item Hint files |
8e07c86e | 1231 | |
a0a8d9d3 DD |
1232 | Hint files tell Configure about a number of things: |
1233 | ||
1234 | =over 4 | |
1235 | ||
1236 | =item o | |
1237 | ||
1238 | The peculiarities or conventions of particular platforms -- non-standard | |
1239 | library locations and names, default installation locations for binaries, | |
1240 | and so on. | |
1241 | ||
1242 | =item o | |
1243 | ||
1244 | The deficiencies of the platform -- for example, library functions that, | |
1245 | although present, are too badly broken to be usable; or limits on | |
1246 | resources that are generously available on most platforms. | |
1247 | ||
1248 | =item o | |
1249 | ||
ab97e755 MB |
1250 | How best to optimize for the platform, both in terms of binary size |
1251 | and/or speed, and for Perl feature support. Because of wide variations in | |
1252 | the implementation of shared libraries and of threading, for example, | |
1253 | Configure often needs hints in order to be able to use these features. | |
a0a8d9d3 DD |
1254 | |
1255 | =back | |
1256 | ||
1257 | The perl distribution includes many system-specific hints files | |
1258 | in the hints/ directory. If one of them matches your system, Configure | |
1259 | will offer to use that hint file. Unless you have a very good reason | |
1260 | not to, you should accept its offer. | |
8e07c86e AD |
1261 | |
1262 | Several of the hint files contain additional important information. | |
ab97e755 MB |
1263 | If you have any problems, it is a good idea to read the relevant hint |
1264 | file for further information. See hints/solaris_2.sh for an extensive | |
1265 | example. More information about writing good hints is in the | |
1266 | hints/README.hints file, which also explains hint files known as | |
1267 | callback-units. | |
a0a8d9d3 DD |
1268 | |
1269 | Note that any hint file is read before any Policy file, meaning that | |
1270 | Policy overrides hints -- see L</Site-wide Policy settings>. | |
8e07c86e | 1271 | |
73d6d1b0 | 1272 | =item WHOA THERE!!! |
edb1cbcb | 1273 | |
ab97e755 MB |
1274 | If you are re-using an old config.sh, it's possible that Configure |
1275 | detects different values from the ones specified in this file. You will | |
1276 | almost always want to keep the previous value, unless you have changed | |
1277 | something on your system. | |
edb1cbcb | 1278 | |
1279 | For example, suppose you have added libgdbm.a to your system | |
1280 | and you decide to reconfigure perl to use GDBM_File. When you run | |
1281 | Configure again, you will need to add -lgdbm to the list of libraries. | |
bfb7748a AD |
1282 | Now, Configure will find your gdbm include file and library and will |
1283 | issue a message: | |
edb1cbcb | 1284 | |
1285 | *** WHOA THERE!!! *** | |
1286 | The previous value for $i_gdbm on this machine was "undef"! | |
1287 | Keep the previous value? [y] | |
1288 | ||
1ec51d55 | 1289 | In this case, you do not want to keep the previous value, so you |
c3edaffb | 1290 | should answer 'n'. (You'll also have to manually add GDBM_File to |
edb1cbcb | 1291 | the list of dynamic extensions to build.) |
1292 | ||
8e07c86e AD |
1293 | =item Changing Compilers |
1294 | ||
1295 | If you change compilers or make other significant changes, you should | |
1ec51d55 | 1296 | probably not re-use your old config.sh. Simply remove it or |
dd3196cd | 1297 | rename it, then rerun Configure with the options you want to use. |
8e07c86e | 1298 | |
c3edaffb | 1299 | =item Propagating your changes to config.sh |
8e07c86e | 1300 | |
1ec51d55 CS |
1301 | If you make any changes to config.sh, you should propagate |
1302 | them to all the .SH files by running | |
1303 | ||
1304 | sh Configure -S | |
1305 | ||
1306 | You will then have to rebuild by running | |
9d67150a | 1307 | |
1308 | make depend | |
1309 | make | |
8e07c86e | 1310 | |
48370efc JH |
1311 | =item config.over and config.arch |
1312 | ||
668cbedd | 1313 | You can also supply a shell script config.over to override |
48370efc JH |
1314 | Configure's guesses. It will get loaded up at the very end, just |
1315 | before config.sh is created. You have to be careful with this, | |
1316 | however, as Configure does no checking that your changes make sense. | |
1317 | This file is usually good for site-specific customizations. | |
1318 | ||
1319 | There is also another file that, if it exists, is loaded before the | |
1320 | config.over, called config.arch. This file is intended to be per | |
1321 | architecture, not per site, and usually it's the architecture-specific | |
1322 | hints file that creates the config.arch. | |
8e07c86e AD |
1323 | |
1324 | =item config.h | |
1325 | ||
1ec51d55 CS |
1326 | Many of the system dependencies are contained in config.h. |
1327 | Configure builds config.h by running the config_h.SH script. | |
1328 | The values for the variables are taken from config.sh. | |
8e07c86e | 1329 | |
1ec51d55 CS |
1330 | If there are any problems, you can edit config.h directly. Beware, |
1331 | though, that the next time you run Configure, your changes will be | |
8e07c86e AD |
1332 | lost. |
1333 | ||
1334 | =item cflags | |
1335 | ||
1336 | If you have any additional changes to make to the C compiler command | |
1ec51d55 | 1337 | line, they can be made in cflags.SH. For instance, to turn off the |
5729ffdd NC |
1338 | optimizer on toke.c, find the switch structure marked 'or customize here', |
1339 | and add a line for toke.c ahead of the catch-all *) so that it now reads: | |
1340 | ||
1341 | : or customize here | |
1342 | ||
1343 | case "$file" in | |
1344 | toke) optimize='-g' ;; | |
1345 | *) ;; | |
1346 | ||
ab97e755 MB |
1347 | You should not edit the generated file cflags directly, as your changes |
1348 | will be lost the next time you run Configure, or if you edit config.sh. | |
8e07c86e | 1349 | |
f5b3b617 AD |
1350 | To explore various ways of changing ccflags from within a hint file, |
1351 | see the file hints/README.hints. | |
1352 | ||
1353 | To change the C flags for all the files, edit config.sh and change either | |
1354 | $ccflags or $optimize, and then re-run | |
1ec51d55 CS |
1355 | |
1356 | sh Configure -S | |
1357 | make depend | |
8e07c86e | 1358 | |
aa689395 | 1359 | =item No sh |
8e07c86e | 1360 | |
c42e3e15 GS |
1361 | If you don't have sh, you'll have to copy the sample file |
1362 | Porting/config.sh to config.sh and edit your config.sh to reflect your | |
1363 | system's peculiarities. See Porting/pumpkin.pod for more information. | |
8e07c86e AD |
1364 | You'll probably also have to extensively modify the extension building |
1365 | mechanism. | |
1366 | ||
c3edaffb | 1367 | =item Porting information |
1368 | ||
e6f03d26 | 1369 | Specific information for the OS/2, Plan 9, VMS and Win32 ports is in the |
1ec51d55 CS |
1370 | corresponding README files and subdirectories. Additional information, |
1371 | including a glossary of all those config.sh variables, is in the Porting | |
ce80d64e | 1372 | subdirectory. Porting/Glossary should especially come in handy. |
c3edaffb | 1373 | |
7f678428 | 1374 | Ports for other systems may also be available. You should check out |
468f45d5 | 1375 | http://www.cpan.org/ports for current information on ports to |
7f678428 | 1376 | various other operating systems. |
1377 | ||
ce80d64e | 1378 | If you plan to port Perl to a new architecture, study carefully the |
491517e0 | 1379 | section titled "Philosophical Issues in Patching and Porting Perl" |
c222ef46 | 1380 | in the file Porting/pumpkin.pod and the file pod/perlgit.pod. |
491517e0 JA |
1381 | Study also how other non-UNIX ports have solved problems. |
1382 | ||
8e07c86e AD |
1383 | =back |
1384 | ||
ce80d64e | 1385 | =head2 Adding extra modules to the build |
fadf0ef5 JH |
1386 | |
1387 | You can specify extra modules or module bundles to be fetched from the | |
1388 | CPAN and installed as part of the Perl build. Either use the -Dextras=... | |
1389 | command line parameter to Configure, for example like this: | |
1390 | ||
d3df0cfd | 1391 | Configure -Dextras="Bundle::LWP DBI" |
fadf0ef5 JH |
1392 | |
1393 | or answer first 'y' to the question 'Install any extra modules?' and | |
d3df0cfd | 1394 | then answer "Bundle::LWP DBI" to the 'Extras?' question. |
ab97e755 MB |
1395 | The module or the bundle names are as for the CPAN module 'install' |
1396 | command. This will only work if those modules are to be built as dynamic | |
a522f097 AD |
1397 | extensions. If you wish to include those extra modules as static |
1398 | extensions, see L<"Extensions"> above. | |
fadf0ef5 JH |
1399 | |
1400 | Notice that because the CPAN module will be used to fetch the extra | |
1401 | modules, you will need access to the CPAN, either via the Internet, | |
1402 | or via a local copy such as a CD-ROM or a local CPAN mirror. If you | |
1403 | do not, using the extra modules option will die horribly. | |
1404 | ||
1405 | Also notice that you yourself are responsible for satisfying any extra | |
ab97e755 MB |
1406 | dependencies such as external headers or libraries BEFORE trying the |
1407 | build. For example: you will need to have the Foo database specific | |
fadf0ef5 JH |
1408 | headers and libraries installed for the DBD::Foo module. The Configure |
1409 | process or the Perl build process will not help you with these. | |
1410 | ||
ce80d64e | 1411 | =head2 suidperl |
03739d21 | 1412 | |
172dd959 JV |
1413 | suidperl was an optional component of earlier releases of perl. It is no |
1414 | longer available. Instead, use a tool specifically designed to handle | |
1415 | changes in privileges, such as B<sudo>. | |
03739d21 | 1416 | |
8e07c86e AD |
1417 | =head1 make depend |
1418 | ||
bfb7748a AD |
1419 | This will look for all the includes. The output is stored in makefile. |
1420 | The only difference between Makefile and makefile is the dependencies at | |
1421 | the bottom of makefile. If you have to make any changes, you should edit | |
ce80d64e | 1422 | makefile, not Makefile, since the Unix make command reads makefile first. |
bfb7748a AD |
1423 | (On non-Unix systems, the output may be stored in a different file. |
1424 | Check the value of $firstmakefile in your config.sh if in doubt.) | |
8e07c86e AD |
1425 | |
1426 | Configure will offer to do this step for you, so it isn't listed | |
1427 | explicitly above. | |
1428 | ||
1429 | =head1 make | |
1430 | ||
1431 | This will attempt to make perl in the current directory. | |
1432 | ||
8d410bc4 YST |
1433 | =head2 Expected errors |
1434 | ||
f5b5f377 | 1435 | These error reports are normal, and can be ignored: |
8d410bc4 YST |
1436 | |
1437 | ... | |
1438 | make: [extra.pods] Error 1 (ignored) | |
1439 | ... | |
1440 | make: [extras.make] Error 1 (ignored) | |
1441 | ||
8d74ce1c AD |
1442 | =head2 What if it doesn't work? |
1443 | ||
8e07c86e | 1444 | If you can't compile successfully, try some of the following ideas. |
7f678428 | 1445 | If none of them help, and careful reading of the error message and |
8d74ce1c | 1446 | the relevant manual pages on your system doesn't help, |
ff52061e | 1447 | then see L<"Reporting Problems"> below. |
8e07c86e AD |
1448 | |
1449 | =over 4 | |
1450 | ||
1ec51d55 | 1451 | =item hints |
8e07c86e AD |
1452 | |
1453 | If you used a hint file, try reading the comments in the hint file | |
1454 | for further tips and information. | |
1455 | ||
1ec51d55 | 1456 | =item extensions |
8e07c86e | 1457 | |
1ec51d55 | 1458 | If you can successfully build miniperl, but the process crashes |
ce80d64e | 1459 | during the building of extensions, run |
c3edaffb | 1460 | |
3a6175e1 | 1461 | make minitest |
c3edaffb | 1462 | |
1463 | to test your version of miniperl. | |
1464 | ||
e57fd563 | 1465 | =item locale |
1466 | ||
bfb7748a AD |
1467 | If you have any locale-related environment variables set, try unsetting |
1468 | them. I have some reports that some versions of IRIX hang while | |
1469 | running B<./miniperl configpm> with locales other than the C locale. | |
1470 | See the discussion under L<"make test"> below about locales and the | |
ab97e755 MB |
1471 | whole L<perllocale/"LOCALE PROBLEMS"> section in the file |
1472 | pod/perllocale.pod. The latter is especially useful if you see something | |
1473 | like this | |
3e6e419a JH |
1474 | |
1475 | perl: warning: Setting locale failed. | |
1476 | perl: warning: Please check that your locale settings: | |
1477 | LC_ALL = "En_US", | |
1478 | LANG = (unset) | |
1479 | are supported and installed on your system. | |
1480 | perl: warning: Falling back to the standard locale ("C"). | |
1481 | ||
1482 | at Perl startup. | |
e57fd563 | 1483 | |
06aa495b DM |
1484 | =item other environment variables |
1485 | ||
1486 | Configure does not check for environment variables that can sometimes | |
1487 | have a major influence on how perl is built or tested. For example, | |
1488 | OBJECT_MODE on AIX determines the way the compiler and linker deal with | |
1489 | their objects, but this is a variable that only influences build-time | |
1490 | behaviour, and should not affect the perl scripts that are eventually | |
1491 | executed by the perl binary. Other variables, like PERL_UNICODE, | |
adbb55c0 | 1492 | PERL5LIB, and PERL5OPT will influence the behaviour of the test suite. |
06aa495b DM |
1493 | So if you are getting strange test failures, you may want to try |
1494 | retesting with the various PERL variables unset. | |
1495 | ||
7f678428 | 1496 | =item varargs |
c3edaffb | 1497 | |
1498 | If you get varargs problems with gcc, be sure that gcc is installed | |
bfb7748a AD |
1499 | correctly and that you are not passing -I/usr/include to gcc. When using |
1500 | gcc, you should probably have i_stdarg='define' and i_varargs='undef' | |
ce80d64e | 1501 | in config.sh. The problem is usually solved by installing gcc |
bfb7748a AD |
1502 | correctly. If you do change config.sh, don't forget to propagate |
1503 | your changes (see L<"Propagating your changes to config.sh"> below). | |
7f678428 | 1504 | See also the L<"vsprintf"> item below. |
c3edaffb | 1505 | |
bfb7748a | 1506 | =item util.c |
c3edaffb | 1507 | |
1508 | If you get error messages such as the following (the exact line | |
bfb7748a | 1509 | numbers and function name may vary in different versions of perl): |
c3edaffb | 1510 | |
19f4563d | 1511 | util.c: In function 'Perl_form': |
bfb7748a AD |
1512 | util.c:1107: number of arguments doesn't match prototype |
1513 | proto.h:125: prototype declaration | |
c3edaffb | 1514 | |
1515 | it might well be a symptom of the gcc "varargs problem". See the | |
7f678428 | 1516 | previous L<"varargs"> item. |
c3edaffb | 1517 | |
1ec51d55 | 1518 | =item LD_LIBRARY_PATH |
c3edaffb | 1519 | |
1520 | If you run into dynamic loading problems, check your setting of | |
aa689395 | 1521 | the LD_LIBRARY_PATH environment variable. If you're creating a static |
1522 | Perl library (libperl.a rather than libperl.so) it should build | |
c3edaffb | 1523 | fine with LD_LIBRARY_PATH unset, though that may depend on details |
668cbedd | 1524 | of your local setup. |
c3edaffb | 1525 | |
aa689395 | 1526 | =item nm extraction |
c3edaffb | 1527 | |
1528 | If Configure seems to be having trouble finding library functions, | |
1529 | try not using nm extraction. You can do this from the command line | |
1530 | with | |
1531 | ||
1532 | sh Configure -Uusenm | |
1533 | ||
1534 | or by answering the nm extraction question interactively. | |
1ec51d55 | 1535 | If you have previously run Configure, you should not reuse your old |
c3edaffb | 1536 | config.sh. |
1537 | ||
bfb7748a AD |
1538 | =item umask not found |
1539 | ||
1540 | If the build processes encounters errors relating to umask(), the problem | |
1541 | is probably that Configure couldn't find your umask() system call. | |
1542 | Check your config.sh. You should have d_umask='define'. If you don't, | |
1543 | this is probably the L<"nm extraction"> problem discussed above. Also, | |
1544 | try reading the hints file for your system for further information. | |
1545 | ||
7f678428 | 1546 | =item vsprintf |
c3edaffb | 1547 | |
1548 | If you run into problems with vsprintf in compiling util.c, the | |
1549 | problem is probably that Configure failed to detect your system's | |
1550 | version of vsprintf(). Check whether your system has vprintf(). | |
1551 | (Virtually all modern Unix systems do.) Then, check the variable | |
1552 | d_vprintf in config.sh. If your system has vprintf, it should be: | |
1553 | ||
1554 | d_vprintf='define' | |
1555 | ||
1556 | If Configure guessed wrong, it is likely that Configure guessed wrong | |
bfb7748a AD |
1557 | on a number of other common functions too. This is probably |
1558 | the L<"nm extraction"> problem discussed above. | |
c3edaffb | 1559 | |
3fe9a6f1 | 1560 | =item do_aspawn |
1561 | ||
1562 | If you run into problems relating to do_aspawn or do_spawn, the | |
1563 | problem is probably that Configure failed to detect your system's | |
bfb7748a AD |
1564 | fork() function. Follow the procedure in the previous item |
1565 | on L<"nm extraction">. | |
3fe9a6f1 | 1566 | |
84902520 TB |
1567 | =item __inet_* errors |
1568 | ||
1569 | If you receive unresolved symbol errors during Perl build and/or test | |
1570 | referring to __inet_* symbols, check to see whether BIND 8.1 is | |
1571 | installed. It installs a /usr/local/include/arpa/inet.h that refers to | |
1572 | these symbols. Versions of BIND later than 8.1 do not install inet.h | |
1573 | in that location and avoid the errors. You should probably update to a | |
6d240721 | 1574 | newer version of BIND (and remove the files the old one left behind). |
ab97e755 MB |
1575 | If you can't, you can either link with the updated resolver library |
1576 | provided with BIND 8.1 or rename /usr/local/bin/arpa/inet.h during the | |
1577 | Perl build and test process to avoid the problem. | |
6d240721 | 1578 | |
73d6d1b0 | 1579 | =item .*_r() prototype NOT found |
6d240721 JH |
1580 | |
1581 | On a related note, if you see a bunch of complaints like the above about | |
ab97e755 MB |
1582 | reentrant functions -- specifically networking-related ones -- being |
1583 | present but without prototypes available, check to see if BIND 8.1 (or | |
1584 | possibly other BIND 8 versions) is (or has been) installed. They install | |
1585 | header files such as netdb.h into places such as /usr/local/include (or | |
1586 | into another directory as specified at build/install time), at least | |
1587 | optionally. Remove them or put them in someplace that isn't in the C | |
1588 | preprocessor's header file include search path (determined by -I options | |
1589 | plus defaults, normally /usr/include). | |
84902520 | 1590 | |
d6baa268 JH |
1591 | =item #error "No DATAMODEL_NATIVE specified" |
1592 | ||
1593 | This is a common error when trying to build perl on Solaris 2.6 with a | |
1594 | gcc installation from Solaris 2.5 or 2.5.1. The Solaris header files | |
1595 | changed, so you need to update your gcc installation. You can either | |
1596 | rerun the fixincludes script from gcc or take the opportunity to | |
1597 | update your gcc installation. | |
1598 | ||
aa689395 | 1599 | =item Optimizer |
c3edaffb | 1600 | |
9d67150a | 1601 | If you can't compile successfully, try turning off your compiler's |
aa689395 | 1602 | optimizer. Edit config.sh and change the line |
9d67150a | 1603 | |
1604 | optimize='-O' | |
1605 | ||
bfb7748a | 1606 | to |
9d67150a | 1607 | |
1608 | optimize=' ' | |
1609 | ||
1610 | then propagate your changes with B<sh Configure -S> and rebuild | |
1611 | with B<make depend; make>. | |
1612 | ||
4bbc1586 | 1613 | =item Missing functions and Undefined symbols |
9d67150a | 1614 | |
4bbc1586 AD |
1615 | If the build of miniperl fails with a long list of missing functions or |
1616 | undefined symbols, check the libs variable in the config.sh file. It | |
1617 | should look something like | |
1618 | ||
1619 | libs='-lsocket -lnsl -ldl -lm -lc' | |
1620 | ||
1621 | The exact libraries will vary from system to system, but you typically | |
1622 | need to include at least the math library -lm. Normally, Configure | |
1623 | will suggest the correct defaults. If the libs variable is empty, you | |
1624 | need to start all over again. Run | |
1625 | ||
1626 | make distclean | |
1627 | ||
1628 | and start from the very beginning. This time, unless you are sure of | |
1629 | what you are doing, accept the default list of libraries suggested by | |
1630 | Configure. | |
1631 | ||
0ff780f4 MB |
1632 | If the libs variable is missing -lm, there is a chance that libm.so.1 |
1633 | is available, but the required (symbolic) link to libm.so is missing. | |
1634 | (same could be the case for other libraries like libcrypt.so). You | |
1635 | should check your installation for packages that create that link, and | |
1636 | if no package is installed that supplies that link or you cannot install | |
1637 | them, make the symbolic link yourself e.g.: | |
1638 | ||
c7121961 FC |
1639 | $ rpm -qf /usr/lib64/libm.so |
1640 | glibc-devel-2.15-22.17.1.x86_64 | |
1641 | $ ls -lgo /usr/lib64/libm.so | |
1642 | lrwxrwxrwx 1 16 Jan 7 2013 /usr/lib64/libm.so -> /lib64/libm.so.6 | |
0ff780f4 | 1643 | |
c7121961 | 1644 | or |
0ff780f4 | 1645 | |
c7121961 | 1646 | $ sudo ln -s /lib64/libm.so.6 /lib64/libm.so |
0ff780f4 | 1647 | |
4bbc1586 AD |
1648 | If the libs variable looks correct, you might have the |
1649 | L<"nm extraction"> problem discussed above. | |
1650 | ||
668cbedd | 1651 | If you still have missing routines or undefined symbols, you probably |
0ff780f4 MB |
1652 | need to add some library or other, make a symbolic link like described |
1653 | above, or you need to undefine some feature that Configure thought was | |
1654 | there but is defective or incomplete. If you used a hint file, see if | |
1655 | it has any relevant advice. You can also look through through config.h | |
1656 | for likely suspects. | |
8e07c86e | 1657 | |
1ec51d55 | 1658 | =item toke.c |
8e07c86e | 1659 | |
1ec51d55 CS |
1660 | Some compilers will not compile or optimize the larger files (such as |
1661 | toke.c) without some extra switches to use larger jump offsets or | |
1662 | allocate larger internal tables. You can customize the switches for | |
ab97e755 MB |
1663 | each file in cflags.SH. It's okay to insert rules for specific files |
1664 | into makefile since a default rule only takes effect in the absence of a | |
8e07c86e AD |
1665 | specific rule. |
1666 | ||
7f678428 | 1667 | =item Missing dbmclose |
8e07c86e | 1668 | |
c3edaffb | 1669 | SCO prior to 3.2.4 may be missing dbmclose(). An upgrade to 3.2.4 |
1670 | that includes libdbm.nfs (which includes dbmclose()) may be available. | |
8e07c86e | 1671 | |
1bb125e2 MB |
1672 | =item error: too few arguments to function 'dbmclose' |
1673 | ||
1674 | Building ODBM_File on some (Open)SUSE distributions might run into this | |
1675 | error, as the header file is broken. There are two ways to deal with this | |
1676 | ||
1677 | 1. Disable the use of ODBM_FILE | |
1678 | ||
1679 | Configure ... -Dnoextensions=ODBM_File | |
1680 | ||
1681 | 2. Fix the header file, somewhat like this: | |
1682 | ||
1683 | --- a/usr/include/dbm.h 2010-03-24 08:54:59.000000000 +0100 | |
1684 | +++ b/usr/include/dbm.h 2010-03-24 08:55:15.000000000 +0100 | |
1685 | @@ -59,4 +59,4 @@ extern datum firstkey __P((void)); | |
1686 | ||
1687 | extern datum nextkey __P((datum key)); | |
1688 | ||
1689 | -extern int dbmclose __P((DBM *)); | |
1690 | +extern int dbmclose __P((void)); | |
1691 | ||
44666fef | 1692 | =item Warning (mostly harmless): No library found for -lsomething |
7f678428 | 1693 | |
1694 | If you see such a message during the building of an extension, but | |
1695 | the extension passes its tests anyway (see L<"make test"> below), | |
1696 | then don't worry about the warning message. The extension | |
1697 | Makefile.PL goes looking for various libraries needed on various | |
aa689395 | 1698 | systems; few systems will need all the possible libraries listed. |
74b7c41f | 1699 | Most users will see warnings for the ones they don't have. The |
44666fef | 1700 | phrase 'mostly harmless' is intended to reassure you that nothing |
74b7c41f | 1701 | unusual is happening, and the build process is continuing. |
7f678428 | 1702 | |
1703 | On the other hand, if you are building GDBM_File and you get the | |
1704 | message | |
1705 | ||
44666fef | 1706 | Warning (mostly harmless): No library found for -lgdbm |
7f678428 | 1707 | |
1708 | then it's likely you're going to run into trouble somewhere along | |
1709 | the line, since it's hard to see how you can use the GDBM_File | |
1710 | extension without the -lgdbm library. | |
1711 | ||
1712 | It is true that, in principle, Configure could have figured all of | |
1713 | this out, but Configure and the extension building process are not | |
1714 | quite that tightly coordinated. | |
1715 | ||
aa689395 | 1716 | =item sh: ar: not found |
1717 | ||
1718 | This is a message from your shell telling you that the command 'ar' | |
1719 | was not found. You need to check your PATH environment variable to | |
1720 | make sure that it includes the directory with the 'ar' command. This | |
1ec51d55 | 1721 | is a common problem on Solaris, where 'ar' is in the /usr/ccs/bin |
aa689395 | 1722 | directory. |
1723 | ||
1724 | =item db-recno failure on tests 51, 53 and 55 | |
1725 | ||
1726 | Old versions of the DB library (including the DB library which comes | |
1727 | with FreeBSD 2.1) had broken handling of recno databases with modified | |
1728 | bval settings. Upgrade your DB library or OS. | |
1729 | ||
6087ac44 JH |
1730 | =item Bad arg length for semctl, is XX, should be ZZZ |
1731 | ||
c935ba53 | 1732 | If you get this error message from the F<cpan/IPC-SysV/t/sem.t> test, your |
ab97e755 | 1733 | System V IPC may be broken. The XX typically is 20, and that is what ZZZ |
6087ac44 JH |
1734 | also should be. Consider upgrading your OS, or reconfiguring your OS |
1735 | to include the System V semaphores. | |
1736 | ||
c935ba53 | 1737 | =item cpan/IPC-SysV/t/sem........semget: No space left on device |
220f3621 GS |
1738 | |
1739 | Either your account or the whole system has run out of semaphores. Or | |
1740 | both. Either list the semaphores with "ipcs" and remove the unneeded | |
1741 | ones (which ones these are depends on your system and applications) | |
1742 | with "ipcrm -s SEMAPHORE_ID_HERE" or configure more semaphores to your | |
1743 | system. | |
1744 | ||
d6baa268 JH |
1745 | =item GNU binutils |
1746 | ||
1747 | If you mix GNU binutils (nm, ld, ar) with equivalent vendor-supplied | |
1748 | tools you may be in for some trouble. For example creating archives | |
1749 | with an old GNU 'ar' and then using a new current vendor-supplied 'ld' | |
1750 | may lead into linking problems. Either recompile your GNU binutils | |
1751 | under your current operating system release, or modify your PATH not | |
1752 | to include the GNU utils before running Configure, or specify the | |
1753 | vendor-supplied utilities explicitly to Configure, for example by | |
1754 | Configure -Dar=/bin/ar. | |
1755 | ||
16dc217a GS |
1756 | =item THIS PACKAGE SEEMS TO BE INCOMPLETE |
1757 | ||
1758 | The F<Configure> program has not been able to find all the files which | |
1759 | make up the complete Perl distribution. You may have a damaged source | |
1760 | archive file (in which case you may also have seen messages such as | |
1761 | C<gzip: stdin: unexpected end of file> and C<tar: Unexpected EOF on | |
1762 | archive file>), or you may have obtained a structurally-sound but | |
1763 | incomplete archive. In either case, try downloading again from the | |
1764 | official site named at the start of this document. If you do find | |
1765 | that any site is carrying a corrupted or incomplete source code | |
1766 | archive, please report it to the site's maintainer. | |
1767 | ||
16dc217a GS |
1768 | =item invalid token: ## |
1769 | ||
ce80d64e AD |
1770 | You are using a non-ANSI-compliant C compiler. To compile Perl, you |
1771 | need to use a compiler that supports ANSI C. If there is a README | |
1772 | file for your system, it may have further details on your compiler | |
1773 | options. | |
16dc217a | 1774 | |
1ec51d55 | 1775 | =item Miscellaneous |
8e07c86e | 1776 | |
7df75831 | 1777 | Some additional things that have been reported: |
8e07c86e AD |
1778 | |
1779 | Genix may need to use libc rather than libc_s, or #undef VARARGS. | |
1780 | ||
1781 | NCR Tower 32 (OS 2.01.01) may need -W2,-Sl,2000 and #undef MKDIR. | |
1782 | ||
668cbedd | 1783 | UTS may need one or more of -K or -g, and #undef LSTAT. |
8e07c86e | 1784 | |
c935ba53 | 1785 | FreeBSD can fail the F<cpan/IPC-SysV/t/sem.t> test if SysV IPC has not been |
5cda700b | 1786 | configured in the kernel. Perl tries to detect this, though, and |
ce80d64e | 1787 | you will get a message telling you what to do. |
6087ac44 | 1788 | |
6c8d78fb HS |
1789 | Building Perl on a system that has also BIND (headers and libraries) |
1790 | installed may run into troubles because BIND installs its own netdb.h | |
1791 | and socket.h, which may not agree with the operating system's ideas of | |
1792 | the same files. Similarly, including -lbind may conflict with libc's | |
1793 | view of the world. You may have to tweak -Dlocincpth and -Dloclibpth | |
1794 | to avoid the BIND. | |
1795 | ||
8e07c86e AD |
1796 | =back |
1797 | ||
58a21a9b JH |
1798 | =head2 Cross-compilation |
1799 | ||
e7a3c61b | 1800 | Perl can be cross-compiled. It is just not trivial, cross-compilation |
30bba555 | 1801 | rarely is. Perl is routinely cross-compiled for several platforms: as of |
f36edc68 | 1802 | January 2014, these include Android, Blackberry 10, PocketPC aka |
30bba555 BF |
1803 | WinCE, ARM Linux, and Solaris. Previous versions of |
1804 | Perl also provided support for Open Zaurus, Symbian, and | |
1805 | the IBM OS/400, but it's unknown if those ports are still functional. | |
ab97e755 MB |
1806 | These platforms are known as the B<target> platforms, while the systems |
1807 | where the compilation takes place are the B<host> platforms. | |
e7a3c61b JH |
1808 | |
1809 | What makes the situation difficult is that first of all, | |
1810 | cross-compilation environments vary significantly in how they are set | |
1811 | up and used, and secondly because the primary way of configuring Perl | |
1812 | (using the rather large Unix-tool-dependent Configure script) is not | |
1813 | awfully well suited for cross-compilation. However, starting from | |
30bba555 BF |
1814 | version 5.18.0, the Configure script also knows two ways of supporting |
1815 | cross-compilation, so please keep reading. | |
e7a3c61b JH |
1816 | |
1817 | See the following files for more information about compiling Perl for | |
1818 | the particular platforms: | |
1819 | ||
1820 | =over 4 | |
1821 | ||
1822 | =item WinCE/PocketPC | |
1823 | ||
30bba555 | 1824 | L<README.ce or perlce|perlce> |
e7a3c61b | 1825 | |
30bba555 | 1826 | =item Android |
e7a3c61b | 1827 | |
ab97e755 MB |
1828 | L<"Cross-compilation" in README.android or |
1829 | perlandroid|perlandroid/Cross-compilation> | |
e7a3c61b | 1830 | |
30bba555 | 1831 | =item Blackberry |
e7a3c61b | 1832 | |
30bba555 | 1833 | L<"Cross-compilation" in README.qnx or perlqnx|perlqnx/Cross-compilation> |
e7a3c61b | 1834 | |
30bba555 | 1835 | =item Solaris |
e7a3c61b | 1836 | |
ab97e755 MB |
1837 | L<"CROSS-COMPILATION" in README.solaris or |
1838 | perlsolaris|perlsolaris/CROSS-COMPILATION> | |
30bba555 BF |
1839 | |
1840 | =item Linux | |
1841 | ||
1842 | This document; See below. | |
e7a3c61b JH |
1843 | |
1844 | =back | |
1845 | ||
1846 | Packaging and transferring either the core Perl modules or CPAN | |
1847 | modules to the target platform is also left up to the each | |
1848 | cross-compilation environment. Often the cross-compilation target | |
1849 | platforms are somewhat limited in diskspace: see the section | |
1850 | L<Minimizing the Perl installation> to learn more of the minimal set | |
1851 | of files required for a functional Perl installation. | |
1852 | ||
1853 | For some cross-compilation environments the Configure option | |
1854 | C<-Dinstallprefix=...> might be handy, see L<Changing the installation | |
1855 | directory>. | |
1856 | ||
30bba555 | 1857 | About the cross-compilation support of Configure: There's two forms. |
ab97e755 MB |
1858 | The more common one requires some way of transferring and running |
1859 | executables in the target system, such as an ssh connection; this is the | |
1860 | C<./Configure -Dusecrosscompile -Dtargethost=...> route. The second | |
1861 | method doesn't need access to the target system, but requires you to | |
1862 | provide a config.sh, and and a canned Makefile; the rest of this section | |
1863 | describes the former. | |
e7a3c61b | 1864 | |
30bba555 | 1865 | This cross-compilation setup of Configure has successfully been used in |
ab97e755 MB |
1866 | a wide variety of setups, such as a 64-bit OS X host for an Android ARM |
1867 | target, or an amd64 Linux host targeting x86 Solaris, or even Windows. | |
e7a3c61b JH |
1868 | |
1869 | To run Configure in cross-compilation mode the basic switch that | |
30bba555 | 1870 | has to be used is C<-Dusecrosscompile>: |
58a21a9b JH |
1871 | |
1872 | sh ./Configure -des -Dusecrosscompile -D... | |
1873 | ||
1874 | This will make the cpp symbol USE_CROSS_COMPILE and the %Config | |
30bba555 | 1875 | symbol C<usecrosscompile> available. |
58a21a9b JH |
1876 | |
1877 | During the Configure and build, certain helper scripts will be created | |
1878 | into the Cross/ subdirectory. The scripts are used to execute a | |
1879 | cross-compiled executable, and to transfer files to and from the | |
1880 | target host. The execution scripts are named F<run-*> and the | |
1881 | transfer scripts F<to-*> and F<from-*>. The part after the dash is | |
1882 | the method to use for remote execution and transfer: by default the | |
1883 | methods are B<ssh> and B<scp>, thus making the scripts F<run-ssh>, | |
1884 | F<to-scp>, and F<from-scp>. | |
1885 | ||
1886 | To configure the scripts for a target host and a directory (in which | |
1887 | the execution will happen and which is to and from where the transfer | |
1888 | happens), supply Configure with | |
1889 | ||
1890 | -Dtargethost=so.me.ho.st -Dtargetdir=/tar/get/dir | |
1891 | ||
1892 | The targethost is what e.g. ssh will use as the hostname, the targetdir | |
93bc48fa JH |
1893 | must exist (the scripts won't create it), the targetdir defaults to /tmp. |
1894 | You can also specify a username to use for ssh/rsh logins | |
58a21a9b JH |
1895 | |
1896 | -Dtargetuser=luser | |
1897 | ||
30bba555 | 1898 | but in case you don't, "root" will be used. Similarly, you can specify |
ab97e755 MB |
1899 | a non-standard (i.e. not 22) port for the connection, if applicable, |
1900 | through | |
30bba555 BF |
1901 | |
1902 | -Dtargetport=2222 | |
58a21a9b | 1903 | |
30bba555 BF |
1904 | If the name of C<cc> has the usual GNU C semantics for cross |
1905 | compilers, that is, CPU-OS-gcc, the target architecture (C<targetarch>), | |
1906 | plus names of the C<ar>, C<nm>, and C<ranlib> will also be automatically | |
1907 | chosen to be CPU-OS-ar and so on. | |
1908 | (The C<ld> requires more thought and will be chosen later by Configure | |
1909 | as appropriate). This will also aid in guessing the proper | |
1910 | operating system name for the target, which has other repercussions, like | |
ab97e755 MB |
1911 | better defaults and possibly critical fixes for the platform. If |
1912 | Configure isn't guessing the OS name properly, you may need to either add | |
1913 | a hint file redirecting Configure's guess, or modify Configure to make | |
1914 | the correct choice. | |
30bba555 BF |
1915 | |
1916 | If your compiler doesn't follow that convention, you will also need to | |
1917 | specify which target environment to use, as well as C<ar> and friends: | |
58a21a9b JH |
1918 | |
1919 | -Dtargetarch=arm-linux | |
30bba555 BF |
1920 | -Dcc=mycrossgcc |
1921 | -Dar=... | |
1922 | ||
1923 | Additionally, a cross-compilation toolchain will usually install it's own | |
ab97e755 MB |
1924 | logical system root somewhere -- that is, it'll create a directory |
1925 | somewhere which includes subdirectories like 'include' or 'lib'. For | |
1926 | example, you may end up with C</skiff/local/arm-linux>, where | |
30bba555 | 1927 | C</skiff/local/arm-linux/bin> holds the binaries for cross-compilation, |
ab97e755 | 1928 | C</skiff/local/arm-linux/include> has the headers, and |
30bba555 BF |
1929 | C</skiff/local/arm-linux/lib> has the library files. |
1930 | If this is the case, and you are using a compiler that understands | |
1931 | C<--sysroot>, like gcc or clang, you'll want to specify the | |
1932 | C<-Dsysroot> option for Configure: | |
1933 | ||
1934 | -Dsysroot=/skiff/local/arm-linux | |
1935 | ||
1936 | However, if your don't have a suitable directory to pass to C<-Dsysroot>, | |
1937 | you will also need to specify which target environment to use: | |
1938 | ||
58a21a9b JH |
1939 | -Dusrinc=/skiff/local/arm-linux/include |
1940 | -Dincpth=/skiff/local/arm-linux/include | |
1941 | -Dlibpth=/skiff/local/arm-linux/lib | |
1942 | ||
58a21a9b JH |
1943 | In addition to the default execution/transfer methods you can also |
1944 | choose B<rsh> for execution, and B<rcp> or B<cp> for transfer, | |
1945 | for example: | |
1946 | ||
1947 | -Dtargetrun=rsh -Dtargetto=rcp -Dtargetfrom=cp | |
1948 | ||
1949 | Putting it all together: | |
1950 | ||
1951 | sh ./Configure -des -Dusecrosscompile \ | |
93bc48fa | 1952 | -Dtargethost=so.me.ho.st \ |
30bba555 | 1953 | -Dtargetdir=/tar/get/dir \ |
58a21a9b JH |
1954 | -Dtargetuser=root \ |
1955 | -Dtargetarch=arm-linux \ | |
1956 | -Dcc=arm-linux-gcc \ | |
30bba555 | 1957 | -Dsysroot=/skiff/local/arm-linux \ |
58a21a9b JH |
1958 | -D... |
1959 | ||
e7a3c61b | 1960 | or if you are happy with the defaults: |
93bc48fa JH |
1961 | |
1962 | sh ./Configure -des -Dusecrosscompile \ | |
1963 | -Dtargethost=so.me.ho.st \ | |
1964 | -Dcc=arm-linux-gcc \ | |
1965 | -D... | |
1966 | ||
e7a3c61b JH |
1967 | Another example where the cross-compiler has been installed under |
1968 | F</usr/local/arm/2.95.5>: | |
1969 | ||
1970 | sh ./Configure -des -Dusecrosscompile \ | |
1971 | -Dtargethost=so.me.ho.st \ | |
1972 | -Dcc=/usr/local/arm/2.95.5/bin/arm-linux-gcc \ | |
30bba555 BF |
1973 | -Dsysroot=/usr/local/arm/2.95.5 |
1974 | ||
1975 | There is also a C<targetenv> option for Configure which can be used | |
1976 | to modify the environment of the target just before testing begins | |
1977 | during 'make test'. For example, if the target system has a nonstandard | |
1978 | /tmp location, you could do this: | |
1979 | ||
1980 | -Dtargetenv="export TMPDIR=/other/tmp;" | |
1981 | ||
ab97e755 MB |
1982 | If you are planning on cross-compiling to several platforms, or some |
1983 | other thing that would involve running Configure several times, there are | |
1984 | two options that can be used to speed things up considerably. | |
30bba555 BF |
1985 | As a bit of background, when you |
1986 | call Configure with C<-Dusecrosscompile>, it begins by actually partially | |
1987 | building a miniperl on the host machine, as well as the generate_uudmap | |
1988 | binary, and we end up using that during the build. | |
ab97e755 MB |
1989 | So instead of building that new perl every single time, you can build it |
1990 | just once in a separate directory, and then pass the resulting binaries | |
1991 | to Configure like this: | |
30bba555 BF |
1992 | |
1993 | -Dhostperl=/path/to/second/build/dir/miniperl | |
1994 | -Dhostgenerate=/path/to/second/build/dir/generate_uudmap | |
1995 | ||
1996 | Much less commonly, if you are cross-compiling from an ASCII host to an | |
1997 | EBCDIC target, or vise versa, you'll have to pass C<-Uhostgenerate> to | |
1998 | Configure, to signify that you want to build a generate_uudmap binary | |
1999 | that, during make, will be run on the target system. | |
e7a3c61b | 2000 | |
8e07c86e AD |
2001 | =head1 make test |
2002 | ||
d6baa268 JH |
2003 | This will run the regression tests on the perl you just made. If |
2004 | 'make test' doesn't say "All tests successful" then something went | |
36bded94 | 2005 | wrong. |
84902520 | 2006 | |
84902520 | 2007 | Note that you can't run the tests in background if this disables |
fb73857a | 2008 | opening of /dev/tty. You can use 'make test-notty' in that case but |
2009 | a few tty tests will be skipped. | |
c3edaffb | 2010 | |
c4f23d77 AD |
2011 | =head2 What if make test doesn't work? |
2012 | ||
1ec51d55 | 2013 | If make test bombs out, just cd to the t directory and run ./TEST |
36bded94 | 2014 | by hand to see if it makes any difference. |
8e07c86e | 2015 | |
36bded94 AD |
2016 | One way to get more detailed information about failed tests and |
2017 | individual subtests is to run the harness from the t directory: | |
aa689395 | 2018 | |
785aa5e3 | 2019 | cd t ; ./perl harness <list of tests> |
aa689395 | 2020 | |
fb73857a | 2021 | (this assumes that most basic tests succeed, since harness uses |
785aa5e3 RGS |
2022 | complicated constructs). If no list of tests is provided, harness |
2023 | will run all tests. | |
10c7e831 | 2024 | |
36bded94 AD |
2025 | If individual tests fail, you can often run them by hand (from the main |
2026 | perl directory), e.g., | |
2027 | ||
2028 | ./perl -MTestInit t/op/groups.t | |
2029 | ||
fb73857a | 2030 | You should also read the individual tests to see if there are any helpful |
10c7e831 JH |
2031 | comments that apply to your system. You may also need to setup your |
2032 | shared library path if you get errors like: | |
2033 | ||
2034 | /sbin/loader: Fatal Error: cannot map libperl.so | |
2035 | ||
36bded94 AD |
2036 | The file t/README in the t subdirectory contains more information about |
2037 | running and modifying tests. | |
2038 | ||
10c7e831 | 2039 | See L</"Building a shared Perl library"> earlier in this document. |
c3edaffb | 2040 | |
c4f23d77 AD |
2041 | =over 4 |
2042 | ||
2043 | =item locale | |
2044 | ||
1ec51d55 | 2045 | Note: One possible reason for errors is that some external programs |
c07a80fd | 2046 | may be broken due to the combination of your environment and the way |
785aa5e3 | 2047 | 'make test' exercises them. For example, this may happen if you have |
1ec51d55 CS |
2048 | one or more of these environment variables set: LC_ALL LC_CTYPE |
2049 | LC_COLLATE LANG. In some versions of UNIX, the non-English locales | |
e57fd563 | 2050 | are known to cause programs to exhibit mysterious errors. |
2051 | ||
2052 | If you have any of the above environment variables set, please try | |
aa689395 | 2053 | |
2054 | setenv LC_ALL C | |
2055 | ||
2056 | (for C shell) or | |
2057 | ||
2058 | LC_ALL=C;export LC_ALL | |
2059 | ||
1ec51d55 CS |
2060 | for Bourne or Korn shell) from the command line and then retry |
2061 | make test. If the tests then succeed, you may have a broken program that | |
aa689395 | 2062 | is confusing the testing. Please run the troublesome test by hand as |
e57fd563 | 2063 | shown above and see whether you can locate the program. Look for |
1ec51d55 CS |
2064 | things like: exec, `backquoted command`, system, open("|...") or |
2065 | open("...|"). All these mean that Perl is trying to run some | |
e57fd563 | 2066 | external program. |
eed2e782 | 2067 | |
0740bb5b AD |
2068 | =item Timing problems |
2069 | ||
c29923ff JH |
2070 | Several tests in the test suite check timing functions, such as |
2071 | sleep(), and see if they return in a reasonable amount of time. | |
9341413f JH |
2072 | If your system is quite busy and doesn't respond quickly enough, |
2073 | these tests might fail. If possible, try running the tests again | |
2074 | with the system under a lighter load. These timing-sensitive | |
2075 | and load-sensitive tests include F<t/op/alarm.t>, | |
1543af16 TH |
2076 | F<cpan/Time-HiRes/t/alarm.t>, F<cpan/Time-HiRes/t/clock.t>, |
2077 | F<cpan/Time-HiRes/t/itimer.t>, F<cpan/Time-HiRes/t/usleep.t>, | |
2078 | F<dist/threads-shared/t/waithires.t>, | |
c935ba53 | 2079 | F<dist/threads-shared/t/stress.t>, F<lib/Benchmark.t>, |
9341413f | 2080 | F<lib/Memoize/t/expmod_t.t>, and F<lib/Memoize/t/speed.t>. |
0740bb5b | 2081 | |
f89caa8d RGS |
2082 | You might also experience some failures in F<t/op/stat.t> if you build |
2083 | perl on an NFS filesystem, if the remote clock and the system clock are | |
2084 | different. | |
2085 | ||
c4f23d77 AD |
2086 | =item Out of memory |
2087 | ||
2088 | On some systems, particularly those with smaller amounts of RAM, some | |
2089 | of the tests in t/op/pat.t may fail with an "Out of memory" message. | |
7970f296 GS |
2090 | For example, on my SparcStation IPC with 12 MB of RAM, in perl5.5.670, |
2091 | test 85 will fail if run under either t/TEST or t/harness. | |
c4f23d77 AD |
2092 | |
2093 | Try stopping other jobs on the system and then running the test by itself: | |
2094 | ||
04bd6448 | 2095 | ./perl -MTestInit t/op/pat.t |
c4f23d77 AD |
2096 | |
2097 | to see if you have any better luck. If your perl still fails this | |
2098 | test, it does not necessarily mean you have a broken perl. This test | |
2099 | tries to exercise the regular expression subsystem quite thoroughly, | |
2100 | and may well be far more demanding than your normal usage. | |
2101 | ||
a55bb48b AD |
2102 | =item libgcc_s.so.1: cannot open shared object file |
2103 | ||
2104 | This message has been reported on gcc-3.2.3 and earlier installed with | |
2105 | a non-standard prefix. Setting the LD_LIBRARY_PATH environment variable | |
2106 | (or equivalent) to include gcc's lib/ directory with the libgcc_s.so.1 | |
2107 | shared library should fix the problem. | |
2108 | ||
4f76e5ba AD |
2109 | =item Failures from lib/File/Temp/t/security saying "system possibly insecure" |
2110 | ||
2111 | First, such warnings are not necessarily serious or indicative of a | |
2112 | real security threat. That being said, they bear investigating. | |
2113 | ||
2114 | Note that each of the tests is run twice. The first time is in the | |
2115 | directory returned by File::Spec->tmpdir() (often /tmp on Unix | |
2116 | systems), and the second time in the directory from which the test was | |
2117 | run (usually the 't' directory, if the test was run as part of 'make | |
2118 | test'). | |
2119 | ||
2120 | The tests may fail for the following reasons: | |
2121 | ||
2122 | (1) If the directory the tests are being run in is owned by somebody | |
2123 | other than the user running the tests, or by root (uid 0). | |
2124 | ||
2125 | This failure can happen if the Perl source code distribution is | |
668cbedd | 2126 | unpacked in such a way that the user IDs in the distribution package |
4f76e5ba AD |
2127 | are used as-is. Some tar programs do this. |
2128 | ||
2129 | (2) If the directory the tests are being run in is writable by group or | |
2130 | by others, and there is no sticky bit set for the directory. (With | |
2131 | UNIX/POSIX semantics, write access to a directory means the right to | |
2132 | add or remove files in that directory. The 'sticky bit' is a feature | |
2133 | used in some UNIXes to give extra protection to files: if the bit is | |
2134 | set for a directory, no one but the owner (or root) can remove that | |
2135 | file even if the permissions would otherwise allow file removal by | |
2136 | others.) | |
2137 | ||
2138 | This failure may or may not be a real problem: it depends on the | |
2139 | permissions policy used on this particular system. This failure can | |
2140 | also happen if the system either doesn't support the sticky bit (this | |
2141 | is the case with many non-UNIX platforms: in principle File::Temp | |
2142 | should know about these platforms and skip the tests), or if the system | |
2143 | supports the sticky bit but for some reason or reasons it is not being | |
2144 | used. This is, for example, the case with HP-UX: as of HP-UX release | |
2145 | 11.00, the sticky bit is very much supported, but HP-UX doesn't use it | |
2146 | on its /tmp directory as shipped. Also, as with the permissions, some | |
2147 | local policy might dictate that the stickiness is not used. | |
781948c1 | 2148 | |
b2b23189 JH |
2149 | (3) If the system supports the POSIX 'chown giveaway' feature and if |
2150 | any of the parent directories of the temporary file back to the root | |
2151 | directory are 'unsafe', using the definitions given above in (1) and | |
4f76e5ba AD |
2152 | (2). For Unix systems, this is usually not an issue if you are |
2153 | building on a local disk. See the documentation for the File::Temp | |
2154 | module for more information about 'chown giveaway'. | |
781948c1 JH |
2155 | |
2156 | See the documentation for the File::Temp module for more information | |
4f76e5ba | 2157 | about the various security aspects of temporary files. |
781948c1 | 2158 | |
c4f23d77 AD |
2159 | =back |
2160 | ||
5ee651a9 | 2161 | The core distribution can now run its regression tests in parallel on |
ab97e755 MB |
2162 | Unix-like platforms. Instead of running C<make test>, set C<TEST_JOBS> |
2163 | in your environment to the number of tests to run in parallel, and run | |
5ee651a9 NC |
2164 | C<make test_harness>. On a Bourne-like shell, this can be done as |
2165 | ||
2166 | TEST_JOBS=3 make test_harness # Run 3 tests in parallel | |
2167 | ||
ab97e755 MB |
2168 | An environment variable is used, rather than parallel make itself, |
2169 | because L<TAP::Harness> needs to be able to schedule individual | |
2170 | non-conflicting test scripts itself, and there is no standard interface | |
2171 | to C<make> utilities to interact with their job schedulers. | |
5ee651a9 | 2172 | |
8e07c86e AD |
2173 | =head1 make install |
2174 | ||
2175 | This will put perl into the public directory you specified to | |
ab97e755 MB |
2176 | Configure; by default this is /usr/local/bin. It will also try to put |
2177 | the man pages in a reasonable place. It will not nroff the man pages, | |
2178 | however. You may need to be root to run B<make install>. If you are not | |
2179 | root, you must still have permission to install into the directories | |
ce80d64e AD |
2180 | in question and you should ignore any messages about chown not working. |
2181 | ||
19f4563d | 2182 | If "make install" just says "'install' is up to date" or something |
ce80d64e AD |
2183 | similar, you may be on a case-insensitive filesystems such as Mac's HFS+, |
2184 | and you should say "make install-all". (This confusion is brought to you | |
2185 | by the Perl distribution having a file called INSTALL.) | |
8e07c86e | 2186 | |
dd64f1c3 AD |
2187 | =head2 Installing perl under different names |
2188 | ||
2189 | If you want to install perl under a name other than "perl" (for example, | |
2190 | when installing perl with special features enabled, such as debugging), | |
2191 | indicate the alternate name on the "make install" line, such as: | |
2192 | ||
2193 | make install PERLNAME=myperl | |
2194 | ||
beb13193 | 2195 | You can separately change the base used for versioned names (like |
be8498a1 | 2196 | "perl5.8.9") by setting PERLNAME_VERBASE, like |
beb13193 RS |
2197 | |
2198 | make install PERLNAME=perl5 PERLNAME_VERBASE=perl | |
2199 | ||
ab97e755 MB |
2200 | This can be useful if you have to install perl as "perl5" (e.g. to avoid |
2201 | conflicts with an ancient version in /usr/bin supplied by your vendor). | |
be8498a1 | 2202 | Without this the versioned binary would be called "perl55.8.8". |
beb13193 | 2203 | |
ce80d64e AD |
2204 | =head2 Installing perl under a different directory |
2205 | ||
2206 | You can install perl under a different destination directory by using | |
2207 | the DESTDIR variable during C<make install>, with a command like | |
2208 | ||
2209 | make install DESTDIR=/tmp/perl5 | |
2210 | ||
2211 | DESTDIR is automatically prepended to all the installation paths. See | |
7df75831 | 2212 | the example in L<"DESTDIR"> above. |
ce80d64e | 2213 | |
dd64f1c3 AD |
2214 | =head2 Installed files |
2215 | ||
8e07c86e AD |
2216 | If you want to see exactly what will happen without installing |
2217 | anything, you can run | |
4633a7c4 | 2218 | |
8e07c86e AD |
2219 | ./perl installperl -n |
2220 | ./perl installman -n | |
2221 | ||
1ec51d55 | 2222 | make install will install the following: |
8e07c86e | 2223 | |
d56c5707 JH |
2224 | binaries |
2225 | ||
8e07c86e | 2226 | perl, |
be8498a1 | 2227 | perl5.n.n where 5.n.n is the current release number. This |
8e07c86e | 2228 | will be a link to perl. |
d56c5707 JH |
2229 | |
2230 | scripts | |
2231 | ||
979b4168 KW |
2232 | cppstdin This is used by the deprecated switch perl -P, |
2233 | if your cc -E can't read from stdin. | |
2234 | c2ph, pstruct Scripts for handling C structures in header | |
2235 | files. | |
979b4168 KW |
2236 | corelist Shows versions of modules that come with |
2237 | different | |
668cbedd KW |
2238 | versions of perl. |
2239 | cpan The CPAN shell. | |
668cbedd | 2240 | enc2xs Encoding module generator. |
979b4168 KW |
2241 | h2ph Extract constants and simple macros from C |
2242 | headers. | |
8e07c86e | 2243 | h2xs Converts C .h header files to Perl extensions. |
73d6d1b0 RGS |
2244 | instmodsh A shell to examine installed modules. |
2245 | libnetcfg Configure libnet. | |
24b3df7f | 2246 | perlbug Tool to report bugs in Perl. |
8e07c86e | 2247 | perldoc Tool to read perl's pod documentation. |
668cbedd | 2248 | perlivp Perl Installation Verification Procedure. |
73d6d1b0 | 2249 | piconv A Perl implementation of the encoding conversion |
668cbedd KW |
2250 | utility iconv. |
2251 | pl2pm Convert Perl 4 .pl files to Perl 5 .pm modules. | |
8e07c86e | 2252 | pod2html, Converters from perl's pod documentation format |
d56c5707 JH |
2253 | pod2man, |
2254 | pod2text, | |
d56c5707 | 2255 | pod2usage |
668cbedd KW |
2256 | podchecker POD syntax checker. |
2257 | podselect Prints sections of POD documentation. | |
2258 | prove A command-line tool for running tests. | |
2259 | psed A Perl implementation of sed. | |
2260 | ptar A Perl implementation of tar. | |
2261 | ptardiff A diff for tar archives. | |
2262 | ptargrep A grep for tar archives. | |
668cbedd KW |
2263 | shasum A tool to print or check SHA checksums. |
2264 | splain Describe Perl warnings and errors. | |
2265 | xsubpp Compiler to convert Perl XS code into C code. | |
979b4168 | 2266 | zipdetails display the internal structure of zip files |
8e07c86e | 2267 | |
d56c5707 JH |
2268 | library files |
2269 | ||
2270 | in $privlib and $archlib specified to | |
8e07c86e | 2271 | Configure, usually under /usr/local/lib/perl5/. |
d56c5707 JH |
2272 | |
2273 | documentation | |
2274 | ||
d6baa268 JH |
2275 | man pages in $man1dir, usually /usr/local/man/man1. |
2276 | module man | |
2277 | pages in $man3dir, usually /usr/local/man/man3. | |
8e07c86e AD |
2278 | pod/*.pod in $privlib/pod/. |
2279 | ||
33cceb07 | 2280 | installperl will also create the directories listed above |
d6baa268 | 2281 | in L<"Installation Directories">. |
4633a7c4 | 2282 | |
d56c5707 | 2283 | Perl's *.h header files and the libperl library are also installed |
d6baa268 | 2284 | under $archlib so that any user may later build new modules, run the |
56c6f531 JH |
2285 | optional Perl compiler, or embed the perl interpreter into another |
2286 | program even if the Perl source is no longer available. | |
8e07c86e | 2287 | |
33cceb07 RGS |
2288 | =head2 Installing only version-specific parts |
2289 | ||
d56c5707 JH |
2290 | Sometimes you only want to install the version-specific parts of the perl |
2291 | installation. For example, you may wish to install a newer version of | |
33cceb07 | 2292 | perl alongside an already installed production version without |
d56c5707 JH |
2293 | disabling installation of new modules for the production version. |
2294 | To only install the version-specific parts of the perl installation, run | |
2295 | ||
2296 | Configure -Dversiononly | |
2297 | ||
2298 | or answer 'y' to the appropriate Configure prompt. Alternatively, | |
2299 | you can just manually run | |
2300 | ||
2301 | ./perl installperl -v | |
2302 | ||
2303 | and skip installman altogether. | |
33cceb07 | 2304 | |
d56c5707 JH |
2305 | See also L<"Maintaining completely separate versions"> for another |
2306 | approach. | |
2307 | ||
f4ce0e6d RGS |
2308 | =head1 cd /usr/include; h2ph *.h sys/*.h |
2309 | ||
2310 | Some perl scripts need to be able to obtain information from the | |
2311 | system header files. This command will convert the most commonly used | |
2312 | header files in /usr/include into files that can be easily interpreted | |
2313 | by perl. These files will be placed in the architecture-dependent | |
2314 | library ($archlib) directory you specified to Configure. | |
2315 | ||
668cbedd | 2316 | Note: Due to differences in the C and perl languages, the conversion |
f4ce0e6d RGS |
2317 | of the header files is not perfect. You will probably have to |
2318 | hand-edit some of the converted files to get them to parse correctly. | |
2319 | For example, h2ph breaks spectacularly on type casting and certain | |
2320 | structures. | |
2321 | ||
2322 | =head1 installhtml --help | |
2323 | ||
2324 | Some sites may wish to make perl documentation available in HTML | |
2325 | format. The installhtml utility can be used to convert pod | |
2326 | documentation into linked HTML files and install them. | |
2327 | ||
2328 | Currently, the supplied ./installhtml script does not make use of the | |
2329 | html Configure variables. This should be fixed in a future release. | |
2330 | ||
2331 | The following command-line is an example of one used to convert | |
2332 | perl documentation: | |
2333 | ||
2334 | ./installhtml \ | |
2335 | --podroot=. \ | |
2336 | --podpath=lib:ext:pod:vms \ | |
2337 | --recurse \ | |
2338 | --htmldir=/perl/nmanual \ | |
2339 | --htmlroot=/perl/nmanual \ | |
2340 | --splithead=pod/perlipc \ | |
2341 | --splititem=pod/perlfunc \ | |
f4ce0e6d RGS |
2342 | --verbose |
2343 | ||
2344 | See the documentation in installhtml for more details. It can take | |
2345 | many minutes to execute a large installation and you should expect to | |
2346 | see warnings like "no title", "unexpected directive" and "cannot | |
2347 | resolve" as the files are processed. We are aware of these problems | |
2348 | (and would welcome patches for them). | |
2349 | ||
2350 | You may find it helpful to run installhtml twice. That should reduce | |
2351 | the number of "cannot resolve" warnings. | |
2352 | ||
2353 | =head1 cd pod && make tex && (process the latex files) | |
2354 | ||
2355 | Some sites may also wish to make the documentation in the pod/ directory | |
2356 | available in TeX format. Type | |
2357 | ||
2358 | (cd pod && make tex && <process the latex files>) | |
2359 | ||
2360 | =head1 Starting all over again | |
2361 | ||
668cbedd | 2362 | If you wish to rebuild perl from the same build directory, you should |
f4ce0e6d RGS |
2363 | clean it out with the command |
2364 | ||
2365 | make distclean | |
2366 | ||
2367 | or | |
2368 | ||
2369 | make realclean | |
2370 | ||
2371 | The only difference between the two is that make distclean also removes | |
dd8235d9 TC |
2372 | your old config.sh and Policy.sh files. (A plain 'make clean' is now |
2373 | eqivalent to 'make realclean'.) | |
f4ce0e6d RGS |
2374 | |
2375 | If you are upgrading from a previous version of perl, or if you | |
2376 | change systems or compilers or make other significant changes, or if | |
668cbedd | 2377 | you are experiencing difficulties building perl, you should not reuse |
f4ce0e6d RGS |
2378 | your old config.sh. |
2379 | ||
2380 | If your reason to reuse your old config.sh is to save your particular | |
2381 | installation choices, then you can probably achieve the same effect by | |
2382 | using the Policy.sh file. See the section on L<"Site-wide Policy | |
2383 | settings"> above. | |
2384 | ||
ff52061e RGS |
2385 | =head1 Reporting Problems |
2386 | ||
2387 | Wherever possible please use the perlbug tool supplied with this Perl | |
2388 | to report problems, as it automatically includes summary configuration | |
2389 | information about your perl, which may help us track down problems far | |
2390 | more quickly. But first you should read the advice in this file, | |
2391 | carefully re-read the error message and check the relevant manual pages | |
2392 | on your system, as these may help you find an immediate solution. If | |
2393 | you are not sure whether what you are seeing is a bug, you can send a | |
2394 | message describing the problem to the comp.lang.perl.misc newsgroup to | |
2395 | get advice. | |
2396 | ||
2397 | The perlbug tool is installed along with perl, so after you have | |
2398 | completed C<make install> it should be possible to run it with plain | |
2399 | C<perlbug>. If the install fails, or you want to report problems with | |
2400 | C<make test> without installing perl, then you can use C<make nok> to | |
2401 | run perlbug to report the problem, or run it by hand from this source | |
2402 | directory with C<./perl -Ilib utils/perlbug> | |
2403 | ||
2404 | If the build fails too early to run perlbug uninstalled, then please | |
2405 | B<run> the C<./myconfig> shell script, and mail its output along with | |
2406 | an accurate description of your problem to perlbug@perl.org | |
2407 | ||
2408 | If Configure itself fails, and does not generate a config.sh file | |
2409 | (needed to run C<./myconfig>), then please mail perlbug@perl.org the | |
2410 | description of how Configure fails along with details of your system | |
668cbedd | 2411 | -- for example the output from running C<uname -a> |
ff52061e RGS |
2412 | |
2413 | Please try to make your message brief but clear. Brief, clear bug | |
2414 | reports tend to get answered more quickly. Please don't worry if your | |
668cbedd | 2415 | written English is not great -- what matters is how well you describe |
ff52061e RGS |
2416 | the important technical details of the problem you have encountered, |
2417 | not whether your grammar and spelling is flawless. | |
2418 | ||
2419 | Trim out unnecessary information. Do not include large files (such as | |
2420 | config.sh or a complete Configure or make log) unless absolutely | |
2421 | necessary. Do not include a complete transcript of your build | |
2422 | session. Just include the failing commands, the relevant error | |
2423 | messages, and whatever preceding commands are necessary to give the | |
668cbedd | 2424 | appropriate context. Plain text should usually be sufficient -- fancy |
ff52061e RGS |
2425 | attachments or encodings may actually reduce the number of people who |
2426 | read your message. Your message will get relayed to over 400 | |
2427 | subscribers around the world so please try to keep it brief but clear. | |
2428 | ||
5acb7768 | 2429 | If the bug you are reporting has security implications, which make it |
ab97e755 MB |
2430 | inappropriate to send to a publicly archived mailing list, then please |
2431 | send it to perl5-security-report@perl.org. This points to a closed | |
2432 | subscription unarchived mailing list, which includes all the core | |
2433 | committers, who be able to help assess the impact of issues, figure out | |
2434 | a resolution, and help co-ordinate the release of patches to mitigate or | |
2435 | fix the problem across all platforms on which Perl is supported. Please | |
2436 | only use this address for security issues in the Perl core, not for | |
2437 | modules independently distributed on CPAN. | |
5acb7768 | 2438 | |
ff52061e RGS |
2439 | If you are unsure what makes a good bug report please read "How to |
2440 | report Bugs Effectively" by Simon Tatham: | |
2441 | http://www.chiark.greenend.org.uk/~sgtatham/bugs.html | |
2442 | ||
7df75831 | 2443 | =head1 Coexistence with earlier versions of perl 5 |
4633a7c4 | 2444 | |
b95300a8 | 2445 | Perl 5.23.8 is not binary compatible with earlier versions of Perl. |
cc65bb49 | 2446 | In other words, you will have to recompile your XS modules. |
14eee2f1 | 2447 | |
ab97e755 MB |
2448 | In general, you can usually safely upgrade from one version of Perl |
2449 | (e.g. 5.X.Y) to another similar minor version (e.g. 5.X.(Y+1))) without | |
33cceb07 | 2450 | re-compiling all of your extensions. You can also safely leave the old |
ab97e755 MB |
2451 | version around in case the new version causes you problems for some |
2452 | reason. | |
693762b4 | 2453 | |
be8498a1 RGS |
2454 | Usually, most extensions will probably not need to be recompiled to be |
2455 | used with a newer version of Perl. Here is how it is supposed to work. | |
ce80d64e | 2456 | (These examples assume you accept all the Configure defaults.) |
693762b4 | 2457 | |
33cceb07 RGS |
2458 | Suppose you already have version 5.8.7 installed. The directories |
2459 | searched by 5.8.7 are typically like: | |
d6baa268 | 2460 | |
33cceb07 RGS |
2461 | /usr/local/lib/perl5/5.8.7/$archname |
2462 | /usr/local/lib/perl5/5.8.7 | |
2463 | /usr/local/lib/perl5/site_perl/5.8.7/$archname | |
2464 | /usr/local/lib/perl5/site_perl/5.8.7 | |
d6baa268 | 2465 | |
33cceb07 RGS |
2466 | Now, suppose you install version 5.8.8. The directories |
2467 | searched by version 5.8.8 will be: | |
d6baa268 | 2468 | |
33cceb07 RGS |
2469 | /usr/local/lib/perl5/5.8.8/$archname |
2470 | /usr/local/lib/perl5/5.8.8 | |
2471 | /usr/local/lib/perl5/site_perl/5.8.8/$archname | |
2472 | /usr/local/lib/perl5/site_perl/5.8.8 | |
d6baa268 | 2473 | |
33cceb07 RGS |
2474 | /usr/local/lib/perl5/site_perl/5.8.7/$archname |
2475 | /usr/local/lib/perl5/site_perl/5.8.7 | |
c42e3e15 | 2476 | /usr/local/lib/perl5/site_perl/ |
bfb7748a | 2477 | |
c42e3e15 | 2478 | Notice the last three entries -- Perl understands the default structure |
d6baa268 | 2479 | of the $sitelib directories and will look back in older, compatible |
33cceb07 RGS |
2480 | directories. This way, modules installed under 5.8.7 will continue |
2481 | to be usable by 5.8.7 but will also accessible to 5.8.8. Further, | |
d6baa268 | 2482 | suppose that you upgrade a module to one which requires features |
33cceb07 RGS |
2483 | present only in 5.8.8. That new module will get installed into |
2484 | /usr/local/lib/perl5/site_perl/5.8.8 and will be available to 5.8.8, | |
2485 | but will not interfere with the 5.8.7 version. | |
bfb7748a | 2486 | |
c42e3e15 | 2487 | The last entry, /usr/local/lib/perl5/site_perl/, is there so that |
fe23a901 | 2488 | 5.6.0 and above will look for 5.004-era pure perl modules. |
d6baa268 | 2489 | |
33cceb07 RGS |
2490 | Lastly, suppose you now install 5.10.0, which is not binary compatible |
2491 | with 5.8.x. The directories searched by 5.10.0 (if you don't change the | |
fe23a901 RF |
2492 | Configure defaults) will be: |
2493 | ||
33cceb07 RGS |
2494 | /usr/local/lib/perl5/5.10.0/$archname |
2495 | /usr/local/lib/perl5/5.10.0 | |
2496 | /usr/local/lib/perl5/site_perl/5.10.0/$archname | |
2497 | /usr/local/lib/perl5/site_perl/5.10.0 | |
d6baa268 | 2498 | |
33cceb07 | 2499 | /usr/local/lib/perl5/site_perl/5.8.8 |
d6baa268 | 2500 | |
33cceb07 | 2501 | /usr/local/lib/perl5/site_perl/5.8.7 |
fe23a901 | 2502 | |
d6baa268 | 2503 | /usr/local/lib/perl5/site_perl/ |
bfb7748a | 2504 | |
cc65bb49 AD |
2505 | Note that the earlier $archname entries are now gone, but pure perl |
2506 | modules from earlier versions will still be found. | |
2507 | ||
0a08c020 GS |
2508 | This way, you can choose to share compatible extensions, but also upgrade |
2509 | to a newer version of an extension that may be incompatible with earlier | |
2510 | versions, without breaking the earlier versions' installations. | |
693762b4 AD |
2511 | |
2512 | =head2 Maintaining completely separate versions | |
4633a7c4 | 2513 | |
1ec51d55 | 2514 | Many users prefer to keep all versions of perl in completely |
d6baa268 | 2515 | separate directories. This guarantees that an update to one version |
0a08c020 GS |
2516 | won't interfere with another version. (The defaults guarantee this for |
2517 | libraries after 5.6.0, but not for executables. TODO?) One convenient | |
2518 | way to do this is by using a separate prefix for each version, such as | |
d52d4e46 | 2519 | |
b95300a8 | 2520 | sh Configure -Dprefix=/opt/perl5.23.8 |
d52d4e46 | 2521 | |
b95300a8 | 2522 | and adding /opt/perl5.23.8/bin to the shell PATH variable. Such users |
d52d4e46 | 2523 | may also wish to add a symbolic link /usr/local/bin/perl so that |
2524 | scripts can still start with #!/usr/local/bin/perl. | |
2525 | ||
693762b4 | 2526 | Others might share a common directory for maintenance sub-versions |
33cceb07 | 2527 | (e.g. 5.10 for all 5.10.x versions), but change directory with |
693762b4 AD |
2528 | each major version. |
2529 | ||
6877a1cf AD |
2530 | If you are installing a development subversion, you probably ought to |
2531 | seriously consider using a separate directory, since development | |
2532 | subversions may not have all the compatibility wrinkles ironed out | |
2533 | yet. | |
2534 | ||
15912eba | 2535 | =head2 Upgrading from 5.23.7 or earlier |
693762b4 | 2536 | |
15912eba | 2537 | B<Perl 5.23.8 may not be binary compatible with Perl 5.23.7 or |
4683a5d7 | 2538 | earlier Perl releases.> Perl modules having binary parts |
e655887d | 2539 | (meaning that a C compiler is used) will have to be recompiled to be |
b95300a8 SL |
2540 | used with 5.23.8. If you find you do need to rebuild an extension with |
2541 | 5.23.8, you may safely do so without disturbing the older | |
7df75831 | 2542 | installations. (See L<"Coexistence with earlier versions of perl 5"> |
e655887d | 2543 | above.) |
c42e3e15 GS |
2544 | |
2545 | See your installed copy of the perllocal.pod file for a (possibly | |
2546 | incomplete) list of locally installed modules. Note that you want | |
cc65bb49 | 2547 | perllocal.pod, not perllocale.pod, for installed module information. |
693762b4 | 2548 | |
8ebf57cf JH |
2549 | =head1 Minimizing the Perl installation |
2550 | ||
2551 | The following section is meant for people worrying about squeezing the | |
2552 | Perl installation into minimal systems (for example when installing | |
2553 | operating systems, or in really small filesystems). | |
2554 | ||
c8214fdf | 2555 | Leaving out as many extensions as possible is an obvious way: |
5cda700b AD |
2556 | Encode, with its big conversion tables, consumes a lot of |
2557 | space. On the other hand, you cannot throw away everything. The | |
2558 | Fcntl module is pretty essential. If you need to do network | |
c8214fdf JH |
2559 | programming, you'll appreciate the Socket module, and so forth: it all |
2560 | depends on what do you need to do. | |
2561 | ||
8ebf57cf JH |
2562 | In the following we offer two different slimmed down installation |
2563 | recipes. They are informative, not normative: the choice of files | |
2564 | depends on what you need. | |
2565 | ||
2566 | Firstly, the bare minimum to run this script | |
2567 | ||
2568 | use strict; | |
2569 | use warnings; | |
2570 | foreach my $f (</*>) { | |
2571 | print("$f\n"); | |
2572 | } | |
2573 | ||
b95300a8 | 2574 | in Linux with perl-5.23.8 is as follows (under $Config{prefix}): |
8ebf57cf JH |
2575 | |
2576 | ./bin/perl | |
b95300a8 SL |
2577 | ./lib/perl5/5.23.8/strict.pm |
2578 | ./lib/perl5/5.23.8/warnings.pm | |
2579 | ./lib/perl5/5.23.8/i686-linux/File/Glob.pm | |
2580 | ./lib/perl5/5.23.8/feature.pm | |
2581 | ./lib/perl5/5.23.8/XSLoader.pm | |
2582 | ./lib/perl5/5.23.8/i686-linux/auto/File/Glob/Glob.so | |
8ebf57cf | 2583 | |
ab97e755 MB |
2584 | Secondly, for perl-5.10.1, the Debian perl-base package contains 591 |
2585 | files, (of which 510 are for lib/unicore) totaling about 3.5MB in its | |
2586 | i386 version. Omitting the lib/unicore/* files for brevity, the | |
2587 | remaining files are: | |
8ebf57cf | 2588 | |
bfe08c74 | 2589 | /usr/bin/perl |
00930d57 AD |
2590 | /usr/bin/perl5.10.1 |
2591 | /usr/lib/perl/5.10.1/Config.pm | |
2592 | /usr/lib/perl/5.10.1/Config_git.pl | |
2593 | /usr/lib/perl/5.10.1/Config_heavy.pl | |
2594 | /usr/lib/perl/5.10.1/Cwd.pm | |
2595 | /usr/lib/perl/5.10.1/DynaLoader.pm | |
2596 | /usr/lib/perl/5.10.1/Errno.pm | |
2597 | /usr/lib/perl/5.10.1/Fcntl.pm | |
2598 | /usr/lib/perl/5.10.1/File/Glob.pm | |
2599 | /usr/lib/perl/5.10.1/Hash/Util.pm | |
2600 | /usr/lib/perl/5.10.1/IO.pm | |
2601 | /usr/lib/perl/5.10.1/IO/File.pm | |
2602 | /usr/lib/perl/5.10.1/IO/Handle.pm | |
2603 | /usr/lib/perl/5.10.1/IO/Pipe.pm | |
2604 | /usr/lib/perl/5.10.1/IO/Seekable.pm | |
2605 | /usr/lib/perl/5.10.1/IO/Select.pm | |
2606 | /usr/lib/perl/5.10.1/IO/Socket.pm | |
2607 | /usr/lib/perl/5.10.1/IO/Socket/INET.pm | |
2608 | /usr/lib/perl/5.10.1/IO/Socket/UNIX.pm | |
2609 | /usr/lib/perl/5.10.1/List/Util.pm | |
2610 | /usr/lib/perl/5.10.1/POSIX.pm | |
2611 | /usr/lib/perl/5.10.1/Scalar/Util.pm | |
2612 | /usr/lib/perl/5.10.1/Socket.pm | |
2613 | /usr/lib/perl/5.10.1/XSLoader.pm | |
2614 | /usr/lib/perl/5.10.1/auto/Cwd/Cwd.so | |
2615 | /usr/lib/perl/5.10.1/auto/DynaLoader/autosplit.ix | |
2616 | /usr/lib/perl/5.10.1/auto/DynaLoader/dl_expandspec.al | |
2617 | /usr/lib/perl/5.10.1/auto/DynaLoader/dl_find_symbol_anywhere.al | |
2618 | /usr/lib/perl/5.10.1/auto/DynaLoader/dl_findfile.al | |
2619 | /usr/lib/perl/5.10.1/auto/Fcntl/Fcntl.so | |
2620 | /usr/lib/perl/5.10.1/auto/File/Glob/Glob.so | |
2621 | /usr/lib/perl/5.10.1/auto/Hash/Util/Util.so | |
2622 | /usr/lib/perl/5.10.1/auto/IO/IO.so | |
2623 | /usr/lib/perl/5.10.1/auto/List/Util/Util.so | |
2624 | /usr/lib/perl/5.10.1/auto/POSIX/POSIX.so | |
2625 | /usr/lib/perl/5.10.1/auto/POSIX/autosplit.ix | |
2626 | /usr/lib/perl/5.10.1/auto/POSIX/load_imports.al | |
2627 | /usr/lib/perl/5.10.1/auto/Socket/Socket.so | |
2628 | /usr/lib/perl/5.10.1/lib.pm | |
2629 | /usr/lib/perl/5.10.1/re.pm | |
8ebf57cf | 2630 | /usr/share/doc/perl/AUTHORS.gz |
bfe08c74 | 2631 | /usr/share/doc/perl/Documentation |
00930d57 | 2632 | /usr/share/doc/perl/README.Debian |
8ebf57cf | 2633 | /usr/share/doc/perl/changelog.Debian.gz |
bfe08c74 | 2634 | /usr/share/doc/perl/copyright |
00930d57 | 2635 | /usr/share/lintian/overrides/perl-base |
8ebf57cf | 2636 | /usr/share/man/man1/perl.1.gz |
00930d57 AD |
2637 | /usr/share/man/man1/perl5.10.1.1.gz |
2638 | /usr/share/perl/5.10.1/AutoLoader.pm | |
2639 | /usr/share/perl/5.10.1/Carp.pm | |
2640 | /usr/share/perl/5.10.1/Carp/Heavy.pm | |
2641 | /usr/share/perl/5.10.1/Exporter.pm | |
2642 | /usr/share/perl/5.10.1/Exporter/Heavy.pm | |
2643 | /usr/share/perl/5.10.1/File/Spec.pm | |
2644 | /usr/share/perl/5.10.1/File/Spec/Unix.pm | |
2645 | /usr/share/perl/5.10.1/FileHandle.pm | |
2646 | /usr/share/perl/5.10.1/Getopt/Long.pm | |
2647 | /usr/share/perl/5.10.1/IPC/Open2.pm | |
2648 | /usr/share/perl/5.10.1/IPC/Open3.pm | |
2649 | /usr/share/perl/5.10.1/SelectSaver.pm | |
2650 | /usr/share/perl/5.10.1/Symbol.pm | |
2651 | /usr/share/perl/5.10.1/Text/ParseWords.pm | |
2652 | /usr/share/perl/5.10.1/Text/Tabs.pm | |
2653 | /usr/share/perl/5.10.1/Text/Wrap.pm | |
2654 | /usr/share/perl/5.10.1/Tie/Hash.pm | |
2655 | /usr/share/perl/5.10.1/attributes.pm | |
2656 | /usr/share/perl/5.10.1/base.pm | |
2657 | /usr/share/perl/5.10.1/bytes.pm | |
2658 | /usr/share/perl/5.10.1/bytes_heavy.pl | |
2659 | /usr/share/perl/5.10.1/constant.pm | |
2660 | /usr/share/perl/5.10.1/fields.pm | |
2661 | /usr/share/perl/5.10.1/integer.pm | |
2662 | /usr/share/perl/5.10.1/locale.pm | |
2663 | /usr/share/perl/5.10.1/overload.pm | |
2664 | /usr/share/perl/5.10.1/strict.pm | |
2665 | /usr/share/perl/5.10.1/unicore/* | |
2666 | /usr/share/perl/5.10.1/utf8.pm | |
2667 | /usr/share/perl/5.10.1/utf8_heavy.pl | |
2668 | /usr/share/perl/5.10.1/vars.pm | |
2669 | /usr/share/perl/5.10.1/warnings.pm | |
2670 | /usr/share/perl/5.10.1/warnings/register.pm | |
8ebf57cf | 2671 | |
e7a3c61b JH |
2672 | A nice trick to find out the minimal set of Perl library files you will |
2673 | need to run a Perl program is | |
2674 | ||
a0a8d9d3 | 2675 | perl -e 'do "prog.pl"; END { print "$_\n" for sort keys %INC }' |
e7a3c61b JH |
2676 | |
2677 | (this will not find libraries required in runtime, unfortunately, but | |
2678 | it's a minimal set) and if you want to find out all the files you can | |
2679 | use something like the below | |
2680 | ||
979b4168 KW |
2681 | strace perl -le 'do "x.pl"' 2>&1 \ |
2682 | | perl -nle '/^open\(\"(.+?)"/ && print $1' | |
e7a3c61b JH |
2683 | |
2684 | (The 'strace' is Linux-specific, other similar utilities include 'truss' | |
2685 | and 'ktrace'.) | |
2686 | ||
c19ccd8c RGS |
2687 | =head2 C<-DNO_MATHOMS> |
2688 | ||
2689 | If you configure perl with C<-Accflags=-DNO_MATHOMS>, the functions from | |
2690 | F<mathoms.c> will not be compiled in. Those functions are no longer used | |
2691 | by perl itself; for source compatibility reasons, though, they weren't | |
2692 | completely removed. | |
2693 | ||
8e07c86e AD |
2694 | =head1 DOCUMENTATION |
2695 | ||
bfb7748a AD |
2696 | Read the manual entries before running perl. The main documentation |
2697 | is in the pod/ subdirectory and should have been installed during the | |
8e07c86e | 2698 | build process. Type B<man perl> to get started. Alternatively, you |
bfb7748a AD |
2699 | can type B<perldoc perl> to use the supplied perldoc script. This is |
2700 | sometimes useful for finding things in the library modules. | |
8e07c86e AD |
2701 | |
2702 | =head1 AUTHOR | |
2703 | ||
bfb7748a AD |
2704 | Original author: Andy Dougherty doughera@lafayette.edu , borrowing very |
2705 | heavily from the original README by Larry Wall, with lots of helpful | |
2706 | feedback and additions from the perl5-porters@perl.org folks. | |
fb73857a | 2707 | |
f5b3b617 AD |
2708 | If you have problems, corrections, or questions, please see |
2709 | L<"Reporting Problems"> above. | |
2710 | ||
2711 | =head1 REDISTRIBUTION | |
2712 | ||
2713 | This document is part of the Perl package and may be distributed under | |
d6baa268 | 2714 | the same terms as perl itself, with the following additional request: |
f5b3b617 | 2715 | If you are distributing a modified version of perl (perhaps as part of |
d6baa268 JH |
2716 | a larger package) please B<do> modify these installation instructions |
2717 | and the contact information to match your distribution. |