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1 | =head1 NAME |
2 | ||
3 | Install - Build and Installation guide for perl5. | |
4 | ||
5 | =head1 SYNOPSIS | |
6 | ||
7f678428 | 7 | The basic steps to build and install perl5 on a Unix system are: |
8e07c86e AD |
8 | |
9 | rm -f config.sh | |
10 | sh Configure | |
11 | make | |
12 | make test | |
13 | make install | |
14 | ||
15 | Each of these is explained in further detail below. | |
16 | ||
7f678428 | 17 | For information on non-Unix systems, see the section on |
18 | L<"Porting Information">, below. | |
19 | ||
c3edaffb | 20 | =head1 DESCRIPTION |
21 | ||
edb1cbcb | 22 | You should probably at least skim through this entire document before |
23 | proceeding. Special notes specific to this release are identified | |
24 | by B<NOTE>. | |
25 | ||
c3edaffb | 26 | This document is written in pod format as an easy way to indicate its |
27 | structure. The pod format is described in pod/perlpod.pod, but you can | |
28 | read it as is with any pager or editor. | |
29 | ||
eed2e782 | 30 | If you're building Perl on a non-Unix system, you should also read |
31 | the README file specific to your operating system, since this may | |
32 | provide additional or different instructions for building Perl. | |
33 | ||
c3edaffb | 34 | =head1 Space Requirements. |
eed2e782 | 35 | |
c3edaffb | 36 | The complete perl5 source tree takes up about 7 MB of disk space. |
37 | The complete tree after completing C<make> takes roughly | |
38 | 15 MB, though the actual total is likely to be quite | |
39 | system-dependent. The installation directories need something | |
40 | on the order of 7 MB, though again that value is system-dependent. | |
8e07c86e AD |
41 | |
42 | =head1 Start with a Fresh Distribution. | |
43 | ||
edb1cbcb | 44 | If you have built perl before, you should clean out the build directory |
45 | with the command | |
46 | ||
47 | make realclean | |
c3edaffb | 48 | |
8e07c86e AD |
49 | The results of a Configure run are stored in the config.sh file. If |
50 | you are upgrading from a previous version of perl, or if you change | |
51 | systems or compilers or make other significant changes, or if you are | |
52 | experiencing difficulties building perl, you should probably I<not> | |
53 | re-use your old config.sh. Simply remove it or rename it, e.g. | |
54 | ||
55 | mv config.sh config.sh.old | |
4633a7c4 | 56 | |
8e07c86e AD |
57 | Then run Configure. |
58 | ||
59 | =head1 Run Configure. | |
60 | ||
61 | Configure will figure out various things about your system. Some | |
62 | things Configure will figure out for itself, other things it will ask | |
63 | you about. To accept the default, just press C<RETURN>. The default | |
64 | is almost always ok. | |
65 | ||
66 | After it runs, Configure will perform variable substitution on all the | |
67 | F<*.SH> files and offer to run B<make depend>. | |
68 | ||
69 | Configure supports a number of useful options. Run B<Configure -h> | |
70 | to get a listing. To compile with gcc, for example, you can run | |
71 | ||
72 | sh Configure -Dcc=gcc | |
73 | ||
74 | This is the preferred way to specify gcc (or another alternative | |
75 | compiler) so that the hints files can set appropriate defaults. | |
76 | ||
4633a7c4 LW |
77 | If you want to use your old config.sh but override some of the items |
78 | with command line options, you need to use B<Configure -O>. | |
79 | ||
8e07c86e AD |
80 | If you are willing to accept all the defaults, and you want terse |
81 | output, you can run | |
82 | ||
83 | sh Configure -des | |
84 | ||
85 | By default, for most systems, perl will be installed in | |
86 | /usr/local/{bin, lib, man}. You can specify a different 'prefix' for | |
87 | the default installation directory, when Configure prompts you or by | |
88 | using the Configure command line option -Dprefix='/some/directory', | |
89 | e.g. | |
90 | ||
25f94b33 | 91 | sh Configure -Dprefix=/opt/perl |
4633a7c4 LW |
92 | |
93 | If your prefix contains the string "perl", then the directories | |
94 | are simplified. For example, if you use prefix=/opt/perl, | |
95 | then Configure will suggest /opt/perl/lib instead of | |
96 | /usr/local/lib/perl5/. | |
8e07c86e AD |
97 | |
98 | By default, Configure will compile perl to use dynamic loading, if | |
99 | your system supports it. If you want to force perl to be compiled | |
56c6f531 JH |
100 | statically, you can either choose this when Configure prompts you or |
101 | you can use the Configure command line option -Uusedl. | |
8e07c86e | 102 | |
24b3df7f | 103 | =head2 Extensions |
104 | ||
edb1cbcb | 105 | By default, Configure will offer to build every extension which appears |
106 | to be supported. For example, Configure will offer to build GDBM_File | |
107 | only if it is able to find the gdbm library. (See examples below.) | |
56c6f531 | 108 | DynaLoader, Fcntl, FileHandle and IO are always built by default. |
edb1cbcb | 109 | Configure does not contain code to test for POSIX compliance, so POSIX |
110 | is always built by default as well. If you wish to skip POSIX, you can | |
111 | set the Configure variable useposix=false either in a hint file or from | |
c3edaffb | 112 | the Configure command line. Similarly, the Opcode extension is always |
edb1cbcb | 113 | built by default, but you can skip it by setting the Configure variable |
c3edaffb | 114 | useopcode=false either in a hint file for from the command line. |
24b3df7f | 115 | |
56c6f531 JH |
116 | Even if you do not have dynamic loading, you must still build the |
117 | DynaLoader extension; you should just build the stub dl_none.xs | |
118 | version. (Configure will suggest this as the default.) | |
119 | ||
24b3df7f | 120 | In summary, here are the Configure command-line variables you can set |
121 | to turn off each extension: | |
122 | ||
123 | DB_File i_db | |
56c6f531 | 124 | DynaLoader (Must always be included as a static extension) |
24b3df7f | 125 | Fcntl (Always included by default) |
edb1cbcb | 126 | FileHandle (Always included by default) |
24b3df7f | 127 | GDBM_File i_gdbm |
9d67150a | 128 | IO (Always included by default) |
24b3df7f | 129 | NDBM_File i_ndbm |
130 | ODBM_File i_dbm | |
131 | POSIX useposix | |
132 | SDBM_File (Always included by default) | |
c3edaffb | 133 | Opcode useopcode |
24b3df7f | 134 | Socket d_socket |
135 | ||
136 | Thus to skip the NDBM_File extension, you can use | |
137 | ||
138 | sh Configure -Ui_ndbm | |
139 | ||
140 | Again, this is taken care of automatically if you don't have the ndbm | |
141 | library. | |
142 | ||
143 | Of course, you may always run Configure interactively and select only | |
144 | the Extensions you want. | |
145 | ||
146 | Finally, if you have dynamic loading (most modern Unix systems do) | |
147 | remember that these extensions do not increase the size of your perl | |
148 | executable, nor do they impact start-up time, so you probably might as | |
149 | well build all the ones that will work on your system. | |
150 | ||
8e07c86e AD |
151 | =head2 GNU-style configure |
152 | ||
153 | If you prefer the GNU-style B<configure> command line interface, you can | |
154 | use the supplied B<configure> command, e.g. | |
155 | ||
156 | CC=gcc ./configure | |
157 | ||
158 | The B<configure> script emulates several of the more common configure | |
159 | options. Try | |
160 | ||
161 | ./configure --help | |
162 | ||
163 | for a listing. | |
164 | ||
165 | Cross compiling is currently not supported. | |
166 | ||
167 | =head2 Including locally-installed libraries | |
168 | ||
4633a7c4 LW |
169 | Perl5 comes with interfaces to number of database extensions, including |
170 | dbm, ndbm, gdbm, and Berkeley db. For each extension, if | |
171 | Configure can find the appropriate header files and libraries, it will | |
172 | automatically include that extension. The gdbm and db libraries | |
173 | are B<not> included with perl. See the library documentation for | |
174 | how to obtain the libraries. | |
8e07c86e AD |
175 | |
176 | I<Note:> If your database header (.h) files are not in a | |
177 | directory normally searched by your C compiler, then you will need to | |
178 | include the appropriate B<-I/your/directory> option when prompted by | |
179 | Configure. If your database library (.a) files are not in a directory | |
180 | normally searched by your C compiler and linker, then you will need to | |
181 | include the appropriate B<-L/your/directory> option when prompted by | |
182 | Configure. See the examples below. | |
183 | ||
184 | =head2 Examples | |
185 | ||
186 | =over 4 | |
187 | ||
188 | =item gdbm in /usr/local. | |
189 | ||
190 | Suppose you have gdbm and want Configure to find it and build the | |
191 | GDBM_File extension. This examples assumes you have F<gdbm.h> | |
192 | installed in F</usr/local/include/gdbm.h> and F<libgdbm.a> installed in | |
193 | F</usr/local/lib/libgdbm.a>. Configure should figure all the | |
194 | necessary steps out automatically. | |
195 | ||
196 | Specifically, when Configure prompts you for flags for | |
197 | your C compiler, you should include C<-I/usr/local/include>. | |
198 | ||
199 | When Configure prompts you for linker flags, you should include | |
200 | C<-L/usr/local/lib>. | |
201 | ||
202 | If you are using dynamic loading, then when Configure prompts you for | |
203 | linker flags for dynamic loading, you should again include | |
204 | C<-L/usr/local/lib>. | |
205 | ||
206 | Again, this should all happen automatically. If you want to accept the | |
207 | defaults for all the questions and have Configure print out only terse | |
208 | messages, then you can just run | |
209 | ||
210 | sh Configure -des | |
211 | ||
212 | and Configure should include the GDBM_File extension automatically. | |
213 | ||
214 | This should actually work if you have gdbm installed in any of | |
215 | (/usr/local, /opt/local, /usr/gnu, /opt/gnu, /usr/GNU, or /opt/GNU). | |
216 | ||
217 | =item gdbm in /usr/you | |
218 | ||
219 | Suppose you have gdbm installed in some place other than /usr/local/, | |
220 | but you still want Configure to find it. To be specific, assume you | |
221 | have F</usr/you/include/gdbm.h> and F</usr/you/lib/libgdbm.a>. You | |
222 | still have to add B<-I/usr/you/include> to cc flags, but you have to take | |
223 | an extra step to help Configure find F<libgdbm.a>. Specifically, when | |
224 | Configure prompts you for library directories, you have to add | |
225 | F</usr/you/lib> to the list. | |
226 | ||
227 | It is possible to specify this from the command line too (all on one | |
228 | line): | |
229 | ||
230 | sh Configure -des \ | |
231 | -Dlocincpth="/usr/you/include" \ | |
232 | -Dloclibpth="/usr/you/lib" | |
233 | ||
234 | C<locincpth> is a space-separated list of include directories to search. | |
235 | Configure will automatically add the appropriate B<-I> directives. | |
236 | ||
237 | C<loclibpth> is a space-separated list of library directories to search. | |
238 | Configure will automatically add the appropriate B<-L> directives. If | |
239 | you have some libraries under F</usr/local/> and others under | |
240 | F</usr/you>, then you have to include both, namely | |
241 | ||
242 | sh Configure -des \ | |
243 | -Dlocincpth="/usr/you/include /usr/local/include" \ | |
244 | -Dloclibpth="/usr/you/lib /usr/local/lib" | |
245 | ||
246 | =back | |
247 | ||
4633a7c4 LW |
248 | =head2 Installation Directories. |
249 | ||
250 | The installation directories can all be changed by answering the | |
251 | appropriate questions in Configure. For convenience, all the | |
252 | installation questions are near the beginning of Configure. | |
253 | ||
254 | By default, Configure uses the following directories for | |
255 | library files (archname is a string like sun4-sunos, determined | |
256 | by Configure) | |
257 | ||
258 | /usr/local/lib/perl5/archname/5.002 | |
259 | /usr/local/lib/perl5/ | |
24b3df7f | 260 | /usr/local/lib/perl5/site_perl/archname |
261 | /usr/local/lib/perl5/site_perl | |
4633a7c4 LW |
262 | |
263 | and the following directories for manual pages: | |
264 | ||
265 | /usr/local/man/man1 | |
266 | /usr/local/lib/perl5/man/man3 | |
267 | ||
268 | (Actually, Configure recognizes the SVR3-style | |
269 | /usr/local/man/l_man/man1 directories, if present, and uses those | |
270 | instead.) The module man pages are stuck in that strange spot so that | |
271 | they don't collide with other man pages stored in /usr/local/man/man3, | |
272 | and so that Perl's man pages don't hide system man pages. On some | |
273 | systems, B<man less> would end up calling up Perl's less.pm module man | |
274 | page, rather than the B<less> program. | |
275 | ||
276 | If you specify a prefix that contains the string "perl", then the | |
277 | directory structure is simplified. For example, if you Configure | |
278 | with -Dprefix=/opt/perl, then the defaults are | |
279 | ||
280 | /opt/perl/lib/archname/5.002 | |
281 | /opt/perl/lib | |
282 | /opt/perl/lib/site_perl/archname | |
283 | /opt/perl/lib/site_perl | |
284 | ||
285 | /opt/perl/man/man1 | |
286 | /opt/perl/man/man3 | |
287 | ||
288 | The perl executable will search the libraries in the order given | |
289 | above. | |
290 | ||
291 | The directories site_perl and site_perl/archname are empty, but are | |
292 | intended to be used for installing local or site-wide extensions. Perl | |
293 | will automatically look in these directories. Previously, most sites | |
294 | just put their local extensions in with the standard distribution. | |
295 | ||
296 | In order to support using things like #!/usr/local/bin/perl5.002 after | |
297 | a later version is released, architecture-dependent libraries are | |
298 | stored in a version-specific directory, such as | |
299 | /usr/local/lib/perl5/archname/5.002/. In 5.000 and 5.001, these files | |
300 | were just stored in /usr/local/lib/perl5/archname/. If you will not be | |
301 | using 5.001 binaries, you can delete the standard extensions from the | |
302 | /usr/local/lib/perl5/archname/ directory. Locally-added extensions can | |
303 | be moved to the site_perl and site_perl/archname directories. | |
304 | ||
305 | Again, these are just the defaults, and can be changed as you run | |
306 | Configure. | |
307 | ||
8e07c86e AD |
308 | =head2 Changing the installation directory |
309 | ||
310 | Configure distinguishes between the directory in which perl (and its | |
311 | associated files) should be installed and the directory in which it | |
312 | will eventually reside. For most sites, these two are the same; for | |
313 | sites that use AFS, this distinction is handled automatically. | |
314 | However, sites that use software such as B<depot> to manage software | |
315 | packages may also wish to install perl into a different directory and | |
316 | use that management software to move perl to its final destination. | |
317 | This section describes how to do this. Someday, Configure may support | |
318 | an option C<-Dinstallprefix=/foo> to simplify this. | |
319 | ||
320 | Suppose you want to install perl under the F</tmp/perl5> directory. | |
321 | You can edit F<config.sh> and change all the install* variables to | |
322 | point to F</tmp/perl5> instead of F</usr/local/wherever>. You could | |
323 | also set them all from the Configure command line. Or, you can | |
324 | automate this process by placing the following lines in a file | |
325 | F<config.over> B<before> you run Configure (replace /tmp/perl5 by a | |
326 | directory of your choice): | |
327 | ||
328 | installprefix=/tmp/perl5 | |
329 | test -d $installprefix || mkdir $installprefix | |
330 | test -d $installprefix/bin || mkdir $installprefix/bin | |
331 | installarchlib=`echo $installarchlib | sed "s!$prefix!$installprefix!"` | |
332 | installbin=`echo $installbin | sed "s!$prefix!$installprefix!"` | |
333 | installman1dir=`echo $installman1dir | sed "s!$prefix!$installprefix!"` | |
334 | installman3dir=`echo $installman3dir | sed "s!$prefix!$installprefix!"` | |
335 | installprivlib=`echo $installprivlib | sed "s!$prefix!$installprefix!"` | |
336 | installscript=`echo $installscript | sed "s!$prefix!$installprefix!"` | |
337 | installsitelib=`echo $installsitelib | sed "s!$prefix!$installprefix!"` | |
4633a7c4 | 338 | installsitearch=`echo $installsitearch | sed "s!$prefix!$installprefix!"` |
8e07c86e AD |
339 | |
340 | Then, you can Configure and install in the usual way: | |
341 | ||
25f94b33 | 342 | sh Configure -des |
8e07c86e AD |
343 | make |
344 | make test | |
345 | make install | |
346 | ||
347 | =head2 Creating an installable tar archive | |
348 | ||
349 | If you need to install perl on many identical systems, it is | |
350 | convenient to compile it once and create an archive that can be | |
351 | installed on multiple systems. Here's one way to do that: | |
352 | ||
353 | # Set up config.over to install perl into a different directory, | |
354 | # e.g. /tmp/perl5 (see previous part). | |
25f94b33 | 355 | sh Configure -des |
8e07c86e AD |
356 | make |
357 | make test | |
358 | make install | |
359 | cd /tmp/perl5 | |
360 | tar cvf ../perl5-archive.tar . | |
361 | # Then, on each machine where you want to install perl, | |
362 | cd /usr/local # Or wherever you specified as $prefix | |
363 | tar xvf perl5-archive.tar | |
364 | ||
9d67150a | 365 | =head2 Building a shared libperl.so Perl library. |
c3edaffb | 366 | |
367 | Currently, for most systems, the main perl executable is built by | |
368 | linking the "perl library" libperl.a with perlmain.o, your static | |
369 | extensions (usually just DynaLoader.a) and various extra libraries, | |
370 | such as -lm. | |
371 | ||
9d67150a | 372 | On some systems that support dynamic loading, it may be possible to |
373 | replace libperl.a with a shared libperl.so. If you anticipate building | |
c3edaffb | 374 | several different perl binaries (e.g. by embedding libperl into |
375 | different programs, or by using the optional compiler extension), then | |
9d67150a | 376 | you might wish to build a shared libperl.so so that all your binaries |
c3edaffb | 377 | can share the same library. |
378 | ||
379 | The disadvantages are that there may be a significant performance | |
9d67150a | 380 | penalty associated with the shared libperl.so, and that the overall |
c3edaffb | 381 | meachanism is still rather fragile with respect to different versions |
382 | and upgrades. | |
383 | ||
384 | In terms of performance, on my test system (Solaris 2.5_x86) the perl | |
9d67150a | 385 | test suite took roughly 15% longer to run with the shared libperl.so. |
c3edaffb | 386 | Your system and typical applications may well give quite different |
387 | results. | |
388 | ||
389 | The default name for the shared library is typically something like | |
9d67150a | 390 | libperl.so.3.2 (for perl5.003_02) or libperl.so.302 or simply |
391 | libperl.so. Configure tries to guess a sensible naming convention | |
c3edaffb | 392 | based on your C library name. Since the library gets installed in a |
393 | version-specific architecture-dependent directory, the exact name | |
394 | isn't very important anyway, as long as your linker is happy. | |
395 | ||
396 | For some systems (mostly SVR4), building a shared libperl is required | |
397 | for dynamic loading to work, and hence is already the default. | |
398 | ||
399 | You can elect to build a shared libperl by | |
400 | ||
401 | sh Configure -Duseshrplib | |
402 | ||
403 | To actually build perl, you must add the current working directory to your | |
404 | LD_LIBRARY_PATH environtment variable before running make. You can do | |
405 | this with | |
406 | ||
407 | LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH | |
408 | ||
409 | for Bourne-style shells, or | |
410 | ||
411 | setenv LD_LIBRARY_PATH `pwd` | |
412 | ||
413 | for Csh-style shells. You *MUST* do this before running make. | |
414 | Folks running NeXT OPENSTEP must substitute DYLD_LIBRARY_PATH for | |
415 | LD_LIBRARY_PATH above. | |
416 | ||
9d67150a | 417 | There is also an potential problem with the shared perl library if you |
418 | want to have more than one "flavor" of the same version of perl (e.g. | |
419 | with and without -DDEBUGGING). For example, suppose you build and | |
420 | install a standard perl5.004 with a shared library. Then, suppose you | |
421 | try to build perl5.004 with -DDEBUGGING enabled, but everything else | |
422 | the same, including all the installation directories. How can you | |
423 | ensure that your newly built perl will link with your newly built | |
7f678428 | 424 | libperl.so.4 rather with the installed libperl.so.4? The answer is |
9d67150a | 425 | that you might not be able to. The installation directory is encoded |
56c6f531 JH |
426 | in the perl binary with the LD_RUN_PATH environment variable (or |
427 | equivalent ld command-line option). On Solaris, you can override that | |
428 | with LD_LIBRARY_PATH; on Linux you can't. | |
9d67150a | 429 | |
430 | The only reliable answer is that you should specify a different | |
431 | directory for the architecture-dependent library for your -DDEBUGGING | |
432 | version of perl. You can do this with by changing all the *archlib* | |
433 | variables in config.sh, namely archlib, archlib_exp, and | |
434 | installarchlib, to point to your new architecture-dependent library. | |
435 | ||
c3edaffb | 436 | =head2 Selecting File IO mechanisms |
437 | ||
9d67150a | 438 | Previous versions of perl used the standard IO mechanisms as defined in |
c3edaffb | 439 | <stdio.h>. Versions 5.003_02 and later of perl allow alternate IO |
440 | mechanisms via a "PerlIO" abstraction, but the stdio mechanism is still | |
441 | the default and is the only supported mechanism. | |
442 | ||
443 | This PerlIO abstraction can be enabled either on the Configure command | |
444 | line with | |
445 | ||
446 | sh Configure -Duseperlio | |
447 | ||
448 | or interactively at the appropriate Configure prompt. | |
449 | ||
450 | If you choose to use the PerlIO abstraction layer, there are two | |
451 | (experimental) possibilities for the underlying IO calls. These have been | |
452 | tested to some extent on some platforms, but are not guaranteed to work | |
453 | everywhere. | |
454 | ||
455 | =over 4 | |
456 | ||
457 | =item 1. | |
458 | ||
459 | AT&T's "sfio". This has superior performance to <stdio.h> in many | |
460 | cases, and is extensible by the use of "disipline" modules. Sfio | |
461 | currently only builds on a subset of the UNIX platforms perl supports. | |
462 | Because the data structures are completely different from stdio, perl | |
463 | extension modules or external libraries may not work. This | |
464 | configuration exists to allow these issues to be worked on. | |
465 | ||
466 | This option requires the 'sfio' package to have been built and installed. | |
467 | A (fairly old) version of sfio is in CPAN, and work is in progress to make | |
468 | it more easily buildable by adding Configure support. | |
469 | ||
470 | You select this option by | |
471 | ||
472 | sh Configure -Duseperlio -Dusesfio | |
473 | ||
474 | If you have already selected -Duseperlio, and if Configure detects | |
475 | that you have sfio, then sfio will be the default suggested by | |
476 | Configure. | |
477 | ||
478 | =item 2. | |
479 | ||
480 | Normal stdio IO, but with all IO going through calls to the PerlIO | |
481 | abstraction layer. This configuration can be used to check that perl and | |
482 | extension modules have been correctly converted to use the PerlIO | |
483 | abstraction. | |
484 | ||
56c6f531 | 485 | This configuration should work on all platforms (but might not). |
c3edaffb | 486 | |
487 | You select this option via : | |
488 | ||
489 | sh Configure -Duseperlio -Uusesfio | |
490 | ||
491 | If you have already selected -Duseperlio, and if Configure does not | |
492 | detect sfio, then this will be the default suggested by Configure. | |
493 | ||
494 | =back | |
495 | ||
8e07c86e AD |
496 | =head2 What if it doesn't work? |
497 | ||
498 | =over 4 | |
499 | ||
25f94b33 AD |
500 | =item Running Configure Interactively |
501 | ||
502 | If Configure runs into trouble, remember that you can always run | |
503 | Configure interactively so that you can check (and correct) its | |
504 | guesses. | |
505 | ||
506 | All the installation questions have been moved to the top, so you don't | |
507 | have to wait for them. Once you've handled them (and your C compiler & | |
c3edaffb | 508 | flags) you can type C<&-d> at the next Configure prompt and Configure |
25f94b33 AD |
509 | will use the defaults from then on. |
510 | ||
511 | If you find yourself trying obscure command line incantations and | |
512 | config.over tricks, I recommend you run Configure interactively | |
513 | instead. You'll probably save yourself time in the long run. | |
514 | ||
8e07c86e AD |
515 | =item Hint files. |
516 | ||
517 | The perl distribution includes a number of system-specific hints files | |
518 | in the hints/ directory. If one of them matches your system, Configure | |
519 | will offer to use that hint file. | |
520 | ||
521 | Several of the hint files contain additional important information. | |
522 | If you have any problems, it is a good idea to read the relevant hint | |
523 | file for further information. See F<hints/solaris_2.sh> for an | |
524 | extensive example. | |
525 | ||
edb1cbcb | 526 | =item *** WHOA THERE!!! *** |
527 | ||
528 | Occasionally, Configure makes a wrong guess. For example, on SunOS | |
529 | 4.1.3, Configure incorrectly concludes that tzname[] is in the | |
530 | standard C library. The hint file is set up to correct for this. You | |
531 | will see a message: | |
532 | ||
533 | *** WHOA THERE!!! *** | |
534 | The recommended value for $d_tzname on this machine was "undef"! | |
535 | Keep the recommended value? [y] | |
536 | ||
537 | You should always keep the recommended value unless, after reading the | |
538 | relevant section of the hint file, you are sure you want to try | |
539 | overriding it. | |
540 | ||
541 | If you are re-using an old config.sh, the word "previous" will be | |
542 | used instead of "recommended". Again, you will almost always want | |
543 | to keep the previous value, unless you have changed something on your | |
544 | system. | |
545 | ||
546 | For example, suppose you have added libgdbm.a to your system | |
547 | and you decide to reconfigure perl to use GDBM_File. When you run | |
548 | Configure again, you will need to add -lgdbm to the list of libraries. | |
549 | Now, Configure will find your gdbm library and will issue a message: | |
550 | ||
551 | *** WHOA THERE!!! *** | |
552 | The previous value for $i_gdbm on this machine was "undef"! | |
553 | Keep the previous value? [y] | |
554 | ||
555 | In this case, you do I<not> want to keep the previous value, so you | |
c3edaffb | 556 | should answer 'n'. (You'll also have to manually add GDBM_File to |
edb1cbcb | 557 | the list of dynamic extensions to build.) |
558 | ||
8e07c86e AD |
559 | =item Changing Compilers |
560 | ||
561 | If you change compilers or make other significant changes, you should | |
562 | probably I<not> re-use your old config.sh. Simply remove it or | |
563 | rename it, e.g. mv config.sh config.sh.old. Then rerun Configure | |
564 | with the options you want to use. | |
565 | ||
566 | This is a common source of problems. If you change from B<cc> to | |
567 | B<gcc>, you should almost always remove your old config.sh. | |
568 | ||
c3edaffb | 569 | =item Propagating your changes to config.sh |
8e07c86e | 570 | |
56c6f531 | 571 | If you make any changes to F<config.sh>, you should propagate |
9d67150a | 572 | them to all the .SH files by running B<sh Configure -S>. You will |
573 | then have to rebuild by running | |
574 | ||
575 | make depend | |
576 | make | |
8e07c86e AD |
577 | |
578 | =item config.over | |
579 | ||
580 | You can also supply a shell script config.over to over-ride Configure's | |
581 | guesses. It will get loaded up at the very end, just before config.sh | |
582 | is created. You have to be careful with this, however, as Configure | |
d52d4e46 | 583 | does no checking that your changes make sense. See the section on |
7f678428 | 584 | L<"Changing the installation directory"> for an example. |
8e07c86e AD |
585 | |
586 | =item config.h | |
587 | ||
588 | Many of the system dependencies are contained in F<config.h>. | |
589 | F<Configure> builds F<config.h> by running the F<config_h.SH> script. | |
590 | The values for the variables are taken from F<config.sh>. | |
591 | ||
592 | If there are any problems, you can edit F<config.h> directly. Beware, | |
593 | though, that the next time you run B<Configure>, your changes will be | |
594 | lost. | |
595 | ||
596 | =item cflags | |
597 | ||
598 | If you have any additional changes to make to the C compiler command | |
599 | line, they can be made in F<cflags.SH>. For instance, to turn off the | |
600 | optimizer on F<toke.c>, find the line in the switch structure for | |
601 | F<toke.c> and put the command C<optimize='-g'> before the C<;;>. You | |
602 | can also edit F<cflags> directly, but beware that your changes will be | |
603 | lost the next time you run B<Configure>. | |
604 | ||
605 | To change the C flags for all the files, edit F<config.sh> | |
606 | and change either C<$ccflags> or C<$optimize>, | |
25f94b33 | 607 | and then re-run B<sh Configure -S ; make depend>. |
8e07c86e AD |
608 | |
609 | =item No sh. | |
610 | ||
611 | If you don't have sh, you'll have to copy the sample file config_H to | |
612 | config.h and edit the config.h to reflect your system's peculiarities. | |
613 | You'll probably also have to extensively modify the extension building | |
614 | mechanism. | |
615 | ||
c3edaffb | 616 | =item Porting information |
617 | ||
618 | Specific information for the OS/2, Plan9, and VMS ports are in the | |
619 | corresponing subdirectories. Additional information, including | |
620 | a glossary of all those config.sh variables, is in the Porting | |
621 | subdirectory. | |
622 | ||
7f678428 | 623 | Ports for other systems may also be available. You should check out |
624 | L<"http:/www.perl.com/CPAN/ports"> for current information on ports to | |
625 | various other operating systems. | |
626 | ||
8e07c86e AD |
627 | =back |
628 | ||
629 | =head1 make depend | |
630 | ||
631 | This will look for all the includes. | |
632 | The output is stored in F<makefile>. The only difference between | |
633 | F<Makefile> and F<makefile> is the dependencies at the bottom of | |
634 | F<makefile>. If you have to make any changes, you should edit | |
635 | F<makefile>, not F<Makefile> since the Unix B<make> command reads | |
c3edaffb | 636 | F<makefile> first. (On non-Unix systems, the output may be stored in |
637 | a different file. Check the value of $firstmakefile in your config.sh | |
638 | if in doubt.) | |
8e07c86e AD |
639 | |
640 | Configure will offer to do this step for you, so it isn't listed | |
641 | explicitly above. | |
642 | ||
643 | =head1 make | |
644 | ||
645 | This will attempt to make perl in the current directory. | |
646 | ||
647 | If you can't compile successfully, try some of the following ideas. | |
7f678428 | 648 | If none of them help, and careful reading of the error message and |
649 | the relevant manual pages on your system doesn't help, you can | |
650 | send a message to either the comp.lang.perl.misc newsgroup or to | |
651 | perlbug@perl.com with an accurate description of your problem. | |
652 | Please include the I<output> of the B<./myconfig> shell script | |
653 | that comes with the distribution. | |
654 | ||
655 | [The B<perlbug> program that comes with the perl distribution is | |
656 | useful for sending in such reports, but you need to have | |
657 | perl compiled and installed before you can use it.] | |
8e07c86e AD |
658 | |
659 | =over 4 | |
660 | ||
661 | =item * | |
662 | ||
663 | If you used a hint file, try reading the comments in the hint file | |
664 | for further tips and information. | |
665 | ||
666 | =item * | |
667 | ||
c3edaffb | 668 | If you can successfully build F<miniperl>, but the process crashes |
669 | during the building of extensions, you should run | |
670 | ||
671 | make minitest | |
672 | ||
673 | to test your version of miniperl. | |
674 | ||
675 | =item * | |
676 | ||
677 | If you get duplicates upon linking for malloc et al, say -DHIDEMYMALLOC. | |
678 | ||
7f678428 | 679 | =item varargs |
c3edaffb | 680 | |
681 | If you get varargs problems with gcc, be sure that gcc is installed | |
682 | correctly. When using gcc, you should probably have i_stdarg='define' | |
683 | and i_varargs='undef' in config.sh. The problem is usually solved by | |
684 | running fixincludes correctly. If you do change config.sh, don't | |
7f678428 | 685 | forget to propagate your changes (see |
686 | L<"Propagating your changes to config.sh"> below). | |
687 | See also the L<"vsprintf"> item below. | |
c3edaffb | 688 | |
689 | =item * | |
690 | ||
691 | If you get error messages such as the following (the exact line | |
692 | numbers will vary in different versions of perl): | |
693 | ||
694 | util.c: In function `Perl_croak': | |
695 | util.c:962: number of arguments doesn't match prototype | |
696 | proto.h:45: prototype declaration | |
697 | ||
698 | it might well be a symptom of the gcc "varargs problem". See the | |
7f678428 | 699 | previous L<"varargs"> item. |
c3edaffb | 700 | |
9d67150a | 701 | =item Solaris and SunOS dynamic loading |
c3edaffb | 702 | |
703 | If you have problems with dynamic loading using gcc on SunOS or | |
704 | Solaris, and you are using GNU as and GNU ld, you may need to add | |
705 | B<-B/bin/> (for SunOS) or B<-B/usr/ccs/bin/> (for Solaris) to your | |
706 | $ccflags, $ldflags, and $lddlflags so that the system's versions of as | |
707 | and ld are used. Alternatively, you can use the GCC_EXEC_PREFIX | |
708 | environment variable to ensure that Sun's as and ld are used. Consult | |
709 | your gcc documentation for further information on the B<-B> option and | |
710 | the GCC_EXEC_PREFIX variable. | |
711 | ||
9d67150a | 712 | =item ld.so.1: ./perl: fatal: relocation error: |
713 | ||
714 | If you get this message on SunOS or Solaris, and you're using gcc, | |
7f678428 | 715 | it's probably the GNU as or GNU ld problem in the previous item |
716 | L<"Solaris and SunOS dynamic loading">. | |
9d67150a | 717 | |
c3edaffb | 718 | =item * |
719 | ||
720 | If you run into dynamic loading problems, check your setting of | |
721 | the LD_LIBRARY_PATH environment variable. Perl should build | |
722 | fine with LD_LIBRARY_PATH unset, though that may depend on details | |
723 | of your local set-up. | |
724 | ||
725 | =item dlopen: stub interception failed | |
726 | ||
727 | The primary cause of the 'dlopen: stub interception failed' message is | |
728 | that the LD_LIBRARY_PATH environment variable includes a directory | |
729 | which is a symlink to /usr/lib (such as /lib). | |
730 | ||
731 | The reason this causes a problem is quite subtle. The file libdl.so.1.0 | |
732 | actually *only* contains functions which generate 'stub interception | |
733 | failed' errors! The runtime linker intercepts links to | |
734 | "/usr/lib/libdl.so.1.0" and links in internal implementation of those | |
735 | functions instead. [Thanks to Tim Bunce for this explanation.] | |
736 | ||
737 | =item * | |
738 | ||
739 | If Configure seems to be having trouble finding library functions, | |
740 | try not using nm extraction. You can do this from the command line | |
741 | with | |
742 | ||
743 | sh Configure -Uusenm | |
744 | ||
745 | or by answering the nm extraction question interactively. | |
746 | If you have previously run Configure, you should I<not> reuse your old | |
747 | config.sh. | |
748 | ||
7f678428 | 749 | =item vsprintf |
c3edaffb | 750 | |
751 | If you run into problems with vsprintf in compiling util.c, the | |
752 | problem is probably that Configure failed to detect your system's | |
753 | version of vsprintf(). Check whether your system has vprintf(). | |
754 | (Virtually all modern Unix systems do.) Then, check the variable | |
755 | d_vprintf in config.sh. If your system has vprintf, it should be: | |
756 | ||
757 | d_vprintf='define' | |
758 | ||
759 | If Configure guessed wrong, it is likely that Configure guessed wrong | |
760 | on a number of other common functions too. You are probably better off | |
761 | re-running Configure without using nm extraction (see previous item). | |
762 | ||
763 | =item * | |
764 | ||
9d67150a | 765 | If you can't compile successfully, try turning off your compiler's |
766 | optimizier. Edit config.sh and change the line | |
767 | ||
768 | optimize='-O' | |
769 | ||
770 | to something like | |
771 | ||
772 | optimize=' ' | |
773 | ||
774 | then propagate your changes with B<sh Configure -S> and rebuild | |
775 | with B<make depend; make>. | |
776 | ||
777 | =item * | |
778 | ||
56c6f531 JH |
779 | If you still can't compile successfully, try adding a C<-DCRIPPLED_CC> |
780 | flag. (Just because you get no errors doesn't mean it compiled right!) | |
781 | This simplifies some complicated expressions for compilers that get | |
782 | indigestion easily. | |
9d67150a | 783 | |
784 | =item Missing functions | |
785 | ||
786 | If you have missing routines, you probably need to add some library or | |
787 | other, or you need to undefine some feature that Configure thought was | |
788 | there but is defective or incomplete. Look through config.h for | |
789 | likely suspects. | |
8e07c86e AD |
790 | |
791 | =item * | |
792 | ||
793 | Some compilers will not compile or optimize the larger files without | |
794 | some extra switches to use larger jump offsets or allocate larger | |
795 | internal tables. You can customize the switches for each file in | |
796 | F<cflags>. It's okay to insert rules for specific files into | |
797 | F<makefile> since a default rule only takes effect in the absence of a | |
798 | specific rule. | |
799 | ||
7f678428 | 800 | =item Missing dbmclose |
8e07c86e | 801 | |
c3edaffb | 802 | SCO prior to 3.2.4 may be missing dbmclose(). An upgrade to 3.2.4 |
803 | that includes libdbm.nfs (which includes dbmclose()) may be available. | |
8e07c86e | 804 | |
7f678428 | 805 | =item Warning (will try anyway): No library found for -lposix |
806 | ||
807 | If you see such a message during the building of an extension, but | |
808 | the extension passes its tests anyway (see L<"make test"> below), | |
809 | then don't worry about the warning message. The extension | |
810 | Makefile.PL goes looking for various libraries needed on various | |
811 | systems; few systems will need all the possible libries listed. | |
812 | For example, a system may have -lcposix or -lposix, but it's | |
813 | unlikely to have both, so most users will see warnings for the one | |
814 | they don't have. The message 'will try anyway' is intended to | |
815 | reassure you that the process is continuing. | |
816 | ||
817 | On the other hand, if you are building GDBM_File and you get the | |
818 | message | |
819 | ||
820 | Warning (will try anyway): No library found for -lgdbm | |
821 | ||
822 | then it's likely you're going to run into trouble somewhere along | |
823 | the line, since it's hard to see how you can use the GDBM_File | |
824 | extension without the -lgdbm library. | |
825 | ||
826 | It is true that, in principle, Configure could have figured all of | |
827 | this out, but Configure and the extension building process are not | |
828 | quite that tightly coordinated. | |
829 | ||
8e07c86e AD |
830 | =item * |
831 | ||
832 | Some additional things that have been reported for either perl4 or perl5: | |
833 | ||
834 | Genix may need to use libc rather than libc_s, or #undef VARARGS. | |
835 | ||
836 | NCR Tower 32 (OS 2.01.01) may need -W2,-Sl,2000 and #undef MKDIR. | |
837 | ||
838 | UTS may need one or more of B<-DCRIPPLED_CC>, B<-K> or B<-g>, and undef LSTAT. | |
839 | ||
840 | If you get syntax errors on '(', try -DCRIPPLED_CC. | |
841 | ||
842 | Machines with half-implemented dbm routines will need to #undef I_ODBM | |
843 | ||
8e07c86e AD |
844 | =back |
845 | ||
846 | =head1 make test | |
847 | ||
848 | This will run the regression tests on the perl you just made. If it | |
849 | doesn't say "All tests successful" then something went wrong. See the | |
850 | file F<t/README> in the F<t> subdirectory. Note that you can't run it | |
c3edaffb | 851 | in background if this disables opening of /dev/tty. |
852 | ||
853 | If B<make test> bombs out, just B<cd> to the F<t> directory and run | |
854 | B<TEST> by hand to see if it makes any difference. If individual tests | |
855 | bomb, you can run them by hand, e.g., | |
8e07c86e AD |
856 | |
857 | ./perl op/groups.t | |
858 | ||
c3edaffb | 859 | You can also read the individual tests to see if there are any helpful |
860 | comments that apply to your system. | |
861 | ||
edb1cbcb | 862 | B<Note>: one possible reason for errors is that some external programs |
c07a80fd | 863 | may be broken due to the combination of your environment and the way |
c3edaffb | 864 | C<make test> exercises them. For example, this may happen if you have |
865 | one or more of these environment variables set: C<LC_ALL LC_CTYPE | |
56c6f531 JH |
866 | LC_COLLATE LANG>. In some versions of UNIX, the non-English locales |
867 | are known to cause programs to exhibit mysterious errors. If you have | |
868 | any of the above environment variables set, please try | |
869 | C<setenv LC_ALL C> (for C shell) or <LC_ALL=C;export LC_ALL> | |
870 | (for Bourne or Korn shell) from the command line and then retry C<make test>. | |
871 | If the tests then succeed, you may have a broken program that is confusing the | |
872 | testing. Please run the troublesome test by hand as shown above and | |
873 | see whether you can locate the program. Look for things like: C<exec, | |
874 | `backquoted command`, system, open("|...")> or C<open("...|")>. | |
c07a80fd | 875 | All these mean that Perl is trying to run some external program. |
eed2e782 | 876 | |
8e07c86e AD |
877 | =head1 INSTALLING PERL5 |
878 | ||
879 | =head1 make install | |
880 | ||
881 | This will put perl into the public directory you specified to | |
882 | B<Configure>; by default this is F</usr/local/bin>. It will also try | |
883 | to put the man pages in a reasonable place. It will not nroff the man | |
884 | page, however. You may need to be root to run B<make install>. If you | |
885 | are not root, you must own the directories in question and you should | |
886 | ignore any messages about chown not working. | |
887 | ||
c3edaffb | 888 | You may see some harmless error messages and warnings from pod2man. |
889 | You may safely ignore them. (Yes, they should be fixed, but they | |
890 | didn't seem important enough to warrant holding up the entire release.) | |
a5f75d66 | 891 | |
8e07c86e AD |
892 | If you want to see exactly what will happen without installing |
893 | anything, you can run | |
4633a7c4 | 894 | |
8e07c86e AD |
895 | ./perl installperl -n |
896 | ./perl installman -n | |
897 | ||
898 | B<make install> will install the following: | |
899 | ||
900 | perl, | |
901 | perl5.nnn where nnn is the current release number. This | |
902 | will be a link to perl. | |
903 | suidperl, | |
904 | sperl5.nnn If you requested setuid emulation. | |
905 | a2p awk-to-perl translator | |
906 | cppstdin This is used by perl -P, if your cc -E can't | |
907 | read from stdin. | |
908 | c2ph, pstruct Scripts for handling C structures in header files. | |
909 | s2p sed-to-perl translator | |
910 | find2perl find-to-perl translator | |
911 | h2xs Converts C .h header files to Perl extensions. | |
24b3df7f | 912 | perlbug Tool to report bugs in Perl. |
8e07c86e AD |
913 | perldoc Tool to read perl's pod documentation. |
914 | pod2html, Converters from perl's pod documentation format | |
915 | pod2latex, and to other useful formats. | |
916 | pod2man | |
917 | ||
918 | library files in $privlib and $archlib specified to | |
919 | Configure, usually under /usr/local/lib/perl5/. | |
920 | man pages in the location specified to Configure, usually | |
921 | something like /usr/local/man/man1. | |
922 | module in the location specified to Configure, usually | |
923 | man pages under /usr/local/lib/perl5/man/man3. | |
924 | pod/*.pod in $privlib/pod/. | |
925 | ||
4633a7c4 LW |
926 | Installperl will also create the library directories $siteperl and |
927 | $sitearch listed in config.sh. Usually, these are something like | |
24b3df7f | 928 | /usr/local/lib/perl5/site_perl/ |
929 | /usr/local/lib/perl5/site_perl/$archname | |
4633a7c4 LW |
930 | where $archname is something like sun4-sunos. These directories |
931 | will be used for installing extensions. | |
932 | ||
56c6f531 JH |
933 | Perl's *.h header files and the libperl.a library are also installed |
934 | under $archlib so that any user may later build new extensions, run the | |
935 | optional Perl compiler, or embed the perl interpreter into another | |
936 | program even if the Perl source is no longer available. | |
8e07c86e AD |
937 | |
938 | Most of the documentation in the pod/ directory is also available | |
939 | in HTML and LaTeX format. Type | |
940 | ||
941 | cd pod; make html; cd .. | |
942 | ||
943 | to generate the html versions, and | |
944 | ||
945 | cd pod; make tex; cd .. | |
946 | ||
947 | to generate the LaTeX versions. | |
948 | ||
eed2e782 | 949 | =head1 cd /usr/include; h2ph *.h sys/*.h |
950 | ||
951 | Some of the perl library files need to be able to obtain information from | |
952 | the system header files. This command will convert the most commonly used | |
953 | header files in F</usr/include> into files that can be easily interpreted | |
954 | by perl. These files will be placed in architectural library directory | |
955 | you specified to B<Configure>; by default this is | |
956 | F</usr/local/lib/perl5/ARCH/VERSION>, where B<ARCH> is your architecture | |
957 | (such as C<sun4-solaris>) and B<VERSION> is the version of perl you are | |
958 | building (for example, C<5.003>). | |
959 | ||
960 | B<NOTE:> Due to differences in the C and perl languages, the conversion of | |
c3edaffb | 961 | the header files in not perfect. You may have to hand edit some of the |
eed2e782 | 962 | converted files to get them to parse correctly. For example, it breaks |
963 | spectacularly on type casting and certain structures. | |
c3edaffb | 964 | |
4633a7c4 LW |
965 | =head1 Coexistence with earlier versions of perl5. |
966 | ||
eed2e782 | 967 | You can safely install the current version of perl5 and still run scripts |
56c6f531 | 968 | under the old binaries for versions 5.003 and later ONLY. Instead of |
eed2e782 | 969 | starting your script with #!/usr/local/bin/perl, just start it with |
56c6f531 JH |
970 | #!/usr/local/bin/perl5.003 (or whatever version you want to run.) |
971 | If you want to retain a version of perl5 prior to perl5.003, you'll | |
eed2e782 | 972 | need to install the current version in a separate directory tree, |
973 | since some of the architecture-independent library files have changed | |
974 | in incompatible ways. | |
4633a7c4 LW |
975 | |
976 | The architecture-dependent files are stored in a version-specific | |
977 | directory (such as F</usr/local/lib/perl5/sun4-sunos/5.002>) so that | |
978 | they are still accessible. I<Note:> perl5.000 and perl5.001 did not | |
979 | put their architecture-dependent libraries in a version-specific | |
980 | directory. They are simply in F</usr/local/lib/perl5/$archname>. If | |
981 | you will not be using 5.000 or 5.001, you may safely remove those | |
982 | files. | |
983 | ||
984 | The standard library files in F</usr/local/lib/perl5> | |
c3edaffb | 985 | should be usable by all versions of perl5. |
4633a7c4 | 986 | |
d52d4e46 | 987 | Most extensions will probably not need to be recompiled to use with a newer |
4633a7c4 LW |
988 | version of perl. If you do run into problems, and you want to continue |
989 | to use the old version of perl along with your extension, simply move | |
990 | those extension files to the appropriate version directory, such as | |
991 | F</usr/local/lib/perl/archname/5.002>. Then perl5.002 will find your | |
992 | files in the 5.002 directory, and newer versions of perl will find your | |
993 | newer extension in the site_perl directory. | |
994 | ||
d52d4e46 | 995 | Some users may prefer to keep all versions of perl in completely |
996 | separate directories. One convenient way to do this is by | |
997 | using a separate prefix for each version, such as | |
998 | ||
999 | sh Configure -Dprefix=/opt/perl5.002 | |
1000 | ||
1001 | and adding /opt/perl5.002/bin to the shell PATH variable. Such users | |
1002 | may also wish to add a symbolic link /usr/local/bin/perl so that | |
1003 | scripts can still start with #!/usr/local/bin/perl. | |
1004 | ||
edb1cbcb | 1005 | B<NOTE>: Starting with 5.002_01, all functions in the perl C source |
1006 | code are protected by default by the prefix Perl_ (or perl_) so that | |
1007 | you may link with third-party libraries without fear of namespace | |
56c6f531 JH |
1008 | collisons. This breaks compatability with |
1009 | version 5.002, so once you install 5.002_01 (or higher) you will | |
edb1cbcb | 1010 | need to re-build and install all of your dynamically loadable |
1011 | extensions. (The standard extensions supplied with Perl are handled | |
1012 | automatically). You can turn off this namespace protection by adding | |
56c6f531 JH |
1013 | -DNO_EMBED to your ccflags variable in config.sh. |
1014 | ||
1015 | In the future, we certainly hope that most extensions won't need to be | |
1016 | recompiled for use with a newer version of perl. | |
edb1cbcb | 1017 | |
8e07c86e AD |
1018 | =head1 Coexistence with perl4 |
1019 | ||
1020 | You can safely install perl5 even if you want to keep perl4 around. | |
1021 | ||
1022 | By default, the perl5 libraries go into F</usr/local/lib/perl5/>, so | |
1023 | they don't override the perl4 libraries in F</usr/local/lib/perl/>. | |
1024 | ||
1025 | In your /usr/local/bin directory, you should have a binary named | |
1026 | F<perl4.036>. That will not be touched by the perl5 installation | |
1027 | process. Most perl4 scripts should run just fine under perl5. | |
1028 | However, if you have any scripts that require perl4, you can replace | |
1029 | the C<#!> line at the top of them by C<#!/usr/local/bin/perl4.036> | |
edb1cbcb | 1030 | (or whatever the appropriate pathname is). See pod/perltrap.pod |
1031 | for possible problems running perl4 scripts under perl5. | |
8e07c86e AD |
1032 | |
1033 | =head1 DOCUMENTATION | |
1034 | ||
1035 | Read the manual entries before running perl. The main documentation is | |
1036 | in the pod/ subdirectory and should have been installed during the | |
1037 | build process. Type B<man perl> to get started. Alternatively, you | |
1038 | can type B<perldoc perl> to use the supplied B<perldoc> script. This | |
1039 | is sometimes useful for finding things in the library modules. | |
1040 | ||
1041 | =head1 AUTHOR | |
1042 | ||
1043 | Andy Dougherty <doughera@lafcol.lafayette.edu>, borrowing I<very> heavily | |
1044 | from the original README by Larry Wall. | |
1045 | ||
a5f75d66 | 1046 | =head1 LAST MODIFIED |
24b3df7f | 1047 | |
56c6f531 | 1048 | 8 October 1996 |