| 1 | =head1 NAME |
| 2 | |
| 3 | Install - Build and Installation guide for perl5. |
| 4 | |
| 5 | =head1 SYNOPSIS |
| 6 | |
| 7 | First, make sure you are installing an up-to-date version of Perl. If |
| 8 | you didn't get your Perl source from CPAN, check the latest version at |
| 9 | <URL:http://www.cpan.org/src/>. |
| 10 | |
| 11 | The basic steps to build and install perl5 on a Unix system |
| 12 | with all the defaults are: |
| 13 | |
| 14 | rm -f config.sh Policy.sh |
| 15 | sh Configure -de |
| 16 | make |
| 17 | make test |
| 18 | make install |
| 19 | |
| 20 | # You may also wish to add these: |
| 21 | (cd /usr/include && h2ph *.h sys/*.h) |
| 22 | (installhtml --help) |
| 23 | (cd pod && make tex && <process the latex files>) |
| 24 | |
| 25 | Each of these is explained in further detail below. |
| 26 | |
| 27 | B<NOTE>: starting from the release 5.6.0 Perl will use a version |
| 28 | scheme where even-numbered subreleases (like 5.6) are stable |
| 29 | maintenance releases and odd-numbered subreleases (like 5.7) are |
| 30 | unstable development releases. Development releases should not be |
| 31 | used in production environments. Fixes and new features are first |
| 32 | carefully tested in development releases and only if they prove |
| 33 | themselves to be worthy will they be migrated to the maintenance |
| 34 | releases. |
| 35 | |
| 36 | The above commands will install Perl to /usr/local or /opt, depending |
| 37 | on the platform. If that's not okay with you, use |
| 38 | |
| 39 | rm -f config.sh Policy.sh |
| 40 | sh Configure |
| 41 | make |
| 42 | make test |
| 43 | make install |
| 44 | |
| 45 | For information on non-Unix systems, see the section on |
| 46 | L<"Porting information"> below. |
| 47 | |
| 48 | If you have problems, corrections, or questions, please see |
| 49 | L<"Reporting Problems"> below. |
| 50 | |
| 51 | For information on what's new in this release, see the |
| 52 | pod/perldelta.pod file. For more detailed information about specific |
| 53 | changes, see the Changes file. |
| 54 | |
| 55 | =head1 DESCRIPTION |
| 56 | |
| 57 | This document is written in pod format as an easy way to indicate its |
| 58 | structure. The pod format is described in pod/perlpod.pod, but you can |
| 59 | read it as is with any pager or editor. Headings and items are marked |
| 60 | by lines beginning with '='. The other mark-up used is |
| 61 | |
| 62 | B<text> embolden text, used for switches, programs or commands |
| 63 | C<code> literal code |
| 64 | L<name> A link (cross reference) to name |
| 65 | |
| 66 | Although most of the defaults are probably fine for most users, |
| 67 | you should probably at least skim through this entire document before |
| 68 | proceeding. |
| 69 | |
| 70 | If you're building Perl on a non-Unix system, you should also read |
| 71 | the README file specific to your operating system, since this may |
| 72 | provide additional or different instructions for building Perl. |
| 73 | |
| 74 | If there is a hint file for your system (in the hints/ directory) you |
| 75 | should also read that hint file for specific information for your |
| 76 | system. (Unixware users should use the svr4.sh hint file.) If |
| 77 | there is a README file for your platform, then you should read |
| 78 | that too. Additional information is in the Porting/ directory. |
| 79 | |
| 80 | =head1 WARNING: This version requires an extra step to build old extensions. |
| 81 | |
| 82 | 5.005_53 and later releases do not export unadorned |
| 83 | global symbols anymore. This means you may need to build older |
| 84 | extensions that have not been updated for the new naming convention |
| 85 | with: |
| 86 | |
| 87 | perl Makefile.PL POLLUTE=1 |
| 88 | |
| 89 | Alternatively, you can enable CPP symbol pollution wholesale by |
| 90 | building perl itself with: |
| 91 | |
| 92 | sh Configure -Accflags=-DPERL_POLLUTE |
| 93 | |
| 94 | pod/perldelta.pod contains more details about this. |
| 95 | |
| 96 | =head1 WARNING: This version may not be binary compatible with Perl 5.005. |
| 97 | |
| 98 | Using the default Configure options for building perl should get you |
| 99 | a perl that will be binary compatible with the 5.005 release. |
| 100 | |
| 101 | However, if you run Configure with any custom options, such as |
| 102 | -Dusethreads, -Dusemultiplicity, -Dusemymalloc, -Ubincompat5005 etc., |
| 103 | the resulting perl will not be binary compatible. Under these |
| 104 | circumstances, if you have dynamically loaded extensions that were |
| 105 | built under perl 5.005, you will need to rebuild and reinstall all |
| 106 | those extensions to use them with 5.6. |
| 107 | |
| 108 | Pure perl modules without XS or C code should continue to work fine |
| 109 | without reinstallation. See the discussions below on |
| 110 | L<"Coexistence with earlier versions of perl5"> and |
| 111 | L<"Upgrading from 5.005 to 5.6"> for more details. |
| 112 | |
| 113 | The standard extensions supplied with Perl will be handled automatically. |
| 114 | |
| 115 | On a related issue, old modules may possibly be affected by the |
| 116 | changes in the Perl language in the current release. Please see |
| 117 | pod/perldelta.pod (and pod/perl500Xdelta.pod) for a description of |
| 118 | what's changed. See your installed copy of the perllocal.pod |
| 119 | file for a (possibly incomplete) list of locally installed modules. |
| 120 | Also see CPAN::autobundle for one way to make a "bundle" of your |
| 121 | currently installed modules. |
| 122 | |
| 123 | =head1 WARNING: This version requires a compiler that supports ANSI C. |
| 124 | |
| 125 | Most C compilers are now ANSI-compliant. However, a few current |
| 126 | computers are delivered with an older C compiler expressly for |
| 127 | rebuilding the system kernel, or for some other historical reason. |
| 128 | Alternatively, you may have an old machine which was shipped before |
| 129 | ANSI compliance became widespread. Such compilers are not suitable |
| 130 | for building Perl. |
| 131 | |
| 132 | If you find that your default C compiler is not ANSI-capable, but you |
| 133 | know that an ANSI-capable compiler is installed on your system, you |
| 134 | can tell F<Configure> to use the correct compiler by means of the |
| 135 | C<-Dcc=> command-line option -- see L<"gcc">. |
| 136 | |
| 137 | If do not have an ANSI-capable compiler there are several avenues open |
| 138 | to you: |
| 139 | |
| 140 | =over 4 |
| 141 | |
| 142 | =item * |
| 143 | |
| 144 | You may try obtaining GCC, available from GNU mirrors worldwide, |
| 145 | listed at <URL:http://www.gnu.org/order/ftp.html>. If, rather than |
| 146 | building gcc from source code, you locate a binary version configured |
| 147 | for your platform, be sure that it is compiled for the version of the |
| 148 | operating system that you are using. |
| 149 | |
| 150 | =item * |
| 151 | |
| 152 | You may purchase a commercial ANSI C compiler from your system |
| 153 | supplier or elsewhere. (Or your organization may already have |
| 154 | licensed such software -- ask your colleagues to find out how to |
| 155 | access it.) If there is a README file for your system in the Perl |
| 156 | distribution (for example, F<README.hpux>), it may contain advice on |
| 157 | suitable compilers. |
| 158 | |
| 159 | =item * |
| 160 | |
| 161 | Another alternative may be to use a tool like ansi2knr to convert the |
| 162 | sources back to K&R style, but there is no guarantee this route will get |
| 163 | you anywhere, since the prototypes are not the only ANSI features used |
| 164 | in the Perl sources. ansi2knr is usually found as part of the freely |
| 165 | available Ghostscript distribution. Another similar tool is |
| 166 | unprotoize, distributed with GCC. Since unprotoize requires GCC to |
| 167 | run, you may have to run it on a platform where GCC is available, and move |
| 168 | the sources back to the platform without GCC. |
| 169 | |
| 170 | If you succeed in automatically converting the sources to a K&R compatible |
| 171 | form, be sure to email perlbug@perl.org to let us know the steps you |
| 172 | followed. This will enable us to officially support this option. |
| 173 | |
| 174 | =back |
| 175 | |
| 176 | Although Perl can be compiled using a C++ compiler, the Configure script |
| 177 | does not work with some C++ compilers. |
| 178 | |
| 179 | =head1 Space Requirements |
| 180 | |
| 181 | The complete perl5 source tree takes up about 20 MB of disk space. |
| 182 | After completing make, it takes up roughly 30 MB, though the actual |
| 183 | total is likely to be quite system-dependent. The installation |
| 184 | directories need something on the order of 20 MB, though again that |
| 185 | value is system-dependent. |
| 186 | |
| 187 | =head1 Start with a Fresh Distribution |
| 188 | |
| 189 | If you have built perl before, you should clean out the build directory |
| 190 | with the command |
| 191 | |
| 192 | make distclean |
| 193 | |
| 194 | or |
| 195 | |
| 196 | make realclean |
| 197 | |
| 198 | The only difference between the two is that make distclean also removes |
| 199 | your old config.sh and Policy.sh files. |
| 200 | |
| 201 | The results of a Configure run are stored in the config.sh and Policy.sh |
| 202 | files. If you are upgrading from a previous version of perl, or if you |
| 203 | change systems or compilers or make other significant changes, or if |
| 204 | you are experiencing difficulties building perl, you should probably |
| 205 | not re-use your old config.sh. Simply remove it |
| 206 | |
| 207 | rm -f config.sh |
| 208 | |
| 209 | If you wish to use your old config.sh, be especially attentive to the |
| 210 | version and architecture-specific questions and answers. For example, |
| 211 | the default directory for architecture-dependent library modules |
| 212 | includes the version name. By default, Configure will reuse your old |
| 213 | name (e.g. /opt/perl/lib/i86pc-solaris/5.003) even if you're running |
| 214 | Configure for a different version, e.g. 5.004. Yes, Configure should |
| 215 | probably check and correct for this, but it doesn't, presently. |
| 216 | Similarly, if you used a shared libperl.so (see below) with version |
| 217 | numbers, you will probably want to adjust them as well. |
| 218 | |
| 219 | Also, be careful to check your architecture name. For example, some |
| 220 | Linux distributions use i386, while others may use i486. If you build |
| 221 | it yourself, Configure uses the output of the arch command, which |
| 222 | might be i586 or i686 instead. If you pick up a precompiled binary, or |
| 223 | compile extensions on different systems, they might not all agree on |
| 224 | the architecture name. |
| 225 | |
| 226 | In short, if you wish to use your old config.sh, I recommend running |
| 227 | Configure interactively rather than blindly accepting the defaults. |
| 228 | |
| 229 | If your reason to reuse your old config.sh is to save your particular |
| 230 | installation choices, then you can probably achieve the same effect by |
| 231 | using the Policy.sh file. See the section on L<"Site-wide Policy |
| 232 | settings"> below. If you wish to start with a fresh distribution, you |
| 233 | also need to remove any old Policy.sh files you may have with |
| 234 | |
| 235 | rm -f Policy.sh |
| 236 | |
| 237 | =head1 Run Configure |
| 238 | |
| 239 | Configure will figure out various things about your system. Some |
| 240 | things Configure will figure out for itself, other things it will ask |
| 241 | you about. To accept the default, just press RETURN. The default is |
| 242 | almost always okay. It is normal for some things to be "NOT found", |
| 243 | since Configure often searches for many different ways of performing |
| 244 | the same function. |
| 245 | |
| 246 | At any Configure prompt, you can type &-d and Configure will use the |
| 247 | defaults from then on. |
| 248 | |
| 249 | After it runs, Configure will perform variable substitution on all the |
| 250 | *.SH files and offer to run make depend. |
| 251 | |
| 252 | =head2 Altering config.sh variables for C compiler switches etc. |
| 253 | |
| 254 | For most users, all of the Configure defaults are fine. Configure |
| 255 | also has several convenient options which are all described below. |
| 256 | However, if Configure doesn't have an option to do what you want, |
| 257 | you can change Configure variables after the platform hints have been |
| 258 | run, by using Configure's -A switch. For example, here's how to add |
| 259 | a couple of extra flags to C compiler invocations: |
| 260 | |
| 261 | sh Configure -Accflags="-DPERL_Y2KWARN -DPERL_POLLUTE_MALLOC" |
| 262 | |
| 263 | For more help on Configure switches, run: |
| 264 | |
| 265 | sh Configure -h |
| 266 | |
| 267 | =head2 Common Configure options |
| 268 | |
| 269 | Configure supports a number of useful options. Run B<Configure -h> to |
| 270 | get a listing. See the Porting/Glossary file for a complete list of |
| 271 | Configure variables you can set and their definitions. |
| 272 | |
| 273 | =over 4 |
| 274 | |
| 275 | =item gcc |
| 276 | |
| 277 | To compile with gcc you should run |
| 278 | |
| 279 | sh Configure -Dcc=gcc |
| 280 | |
| 281 | This is the preferred way to specify gcc (or another alternative |
| 282 | compiler) so that the hints files can set appropriate defaults. |
| 283 | |
| 284 | =item Installation prefix |
| 285 | |
| 286 | By default, for most systems, perl will be installed in |
| 287 | /usr/local/{bin, lib, man}. (See L<"Installation Directories"> |
| 288 | and L<"Coexistence with earlier versions of perl5"> below for |
| 289 | further details.) |
| 290 | |
| 291 | You can specify a different 'prefix' for the default installation |
| 292 | directory, when Configure prompts you or by using the Configure command |
| 293 | line option -Dprefix='/some/directory', e.g. |
| 294 | |
| 295 | sh Configure -Dprefix=/opt/perl |
| 296 | |
| 297 | If your prefix contains the string "perl", then the suggested |
| 298 | directory structure is simplified. For example, if you use |
| 299 | prefix=/opt/perl, then Configure will suggest /opt/perl/lib instead of |
| 300 | /opt/perl/lib/perl5/. Again, see L<"Installation Directories"> below |
| 301 | for more details. |
| 302 | |
| 303 | NOTE: You must not specify an installation directory that is the same |
| 304 | as or below your perl source directory. If you do, installperl will |
| 305 | attempt infinite recursion. |
| 306 | |
| 307 | =item /usr/bin/perl |
| 308 | |
| 309 | It may seem obvious, but Perl is useful only when users can easily |
| 310 | find it. It's often a good idea to have both /usr/bin/perl and |
| 311 | /usr/local/bin/perl be symlinks to the actual binary. Be especially |
| 312 | careful, however, not to overwrite a version of perl supplied by your |
| 313 | vendor unless you are sure you know what you are doing. |
| 314 | |
| 315 | By default, Configure will arrange for /usr/bin/perl to be linked to |
| 316 | the current version of perl. You can turn off that behavior by running |
| 317 | |
| 318 | Configure -Uinstallusrbinperl |
| 319 | |
| 320 | or by answering 'no' to the appropriate Configure prompt. |
| 321 | |
| 322 | In any case, system administrators are strongly encouraged to |
| 323 | put (symlinks to) perl and its accompanying utilities, such as perldoc, |
| 324 | into a directory typically found along a user's PATH, or in another |
| 325 | obvious and convenient place. |
| 326 | |
| 327 | =item Overriding an old config.sh |
| 328 | |
| 329 | If you want to use your old config.sh but override some of the items |
| 330 | with command line options, you need to use B<Configure -O>. |
| 331 | |
| 332 | =back |
| 333 | |
| 334 | If you are willing to accept all the defaults, and you want terse |
| 335 | output, you can run |
| 336 | |
| 337 | sh Configure -des |
| 338 | |
| 339 | Note: for development releases (odd subreleases, like 5.7, as opposed |
| 340 | to maintenance releases which have even subreleases, like 5.6) |
| 341 | if you want to use Configure -d, you will also need to supply -Dusedevel |
| 342 | to Configure, because the default answer to the question "do you really |
| 343 | want to Configure a development version?" is "no". The -Dusedevel |
| 344 | skips that sanity check. |
| 345 | |
| 346 | For example for my Solaris system, I usually use |
| 347 | |
| 348 | sh Configure -Dprefix=/opt/perl -Doptimize='-xpentium -xO4' -des |
| 349 | |
| 350 | =head2 GNU-style configure |
| 351 | |
| 352 | If you prefer the GNU-style configure command line interface, you can |
| 353 | use the supplied configure.gnu command, e.g. |
| 354 | |
| 355 | CC=gcc ./configure.gnu |
| 356 | |
| 357 | The configure.gnu script emulates a few of the more common configure |
| 358 | options. Try |
| 359 | |
| 360 | ./configure.gnu --help |
| 361 | |
| 362 | for a listing. |
| 363 | |
| 364 | Cross compiling and compiling in a different directory are not supported. |
| 365 | |
| 366 | (The file is called configure.gnu to avoid problems on systems |
| 367 | that would not distinguish the files "Configure" and "configure".) |
| 368 | |
| 369 | =head2 Installation Directories |
| 370 | |
| 371 | The installation directories can all be changed by answering the |
| 372 | appropriate questions in Configure. For convenience, all the |
| 373 | installation questions are near the beginning of Configure. |
| 374 | Further, there are a number of additions to the installation |
| 375 | directories since 5.005, so reusing your old config.sh may not |
| 376 | be sufficient to put everything where you want it. |
| 377 | |
| 378 | I highly recommend running Configure interactively to be sure it puts |
| 379 | everything where you want it. At any point during the Configure |
| 380 | process, you can answer a question with &-d and Configure will use |
| 381 | the defaults from then on. |
| 382 | |
| 383 | The defaults are intended to be reasonable and sensible for most |
| 384 | people building from sources. Those who build and distribute binary |
| 385 | distributions or who export perl to a range of systems will probably |
| 386 | need to alter them. If you are content to just accept the defaults, |
| 387 | you can safely skip the next section. |
| 388 | |
| 389 | The directories set up by Configure fall into three broad categories. |
| 390 | |
| 391 | =over 4 |
| 392 | |
| 393 | =item Directories for the perl distribution |
| 394 | |
| 395 | By default, Configure will use the following directories for 5.6.0. |
| 396 | $version is the full perl version number, including subversion, e.g. |
| 397 | 5.6.0 or 5.6.1, and $archname is a string like sun4-sunos, |
| 398 | determined by Configure. The full definitions of all Configure |
| 399 | variables are in the file Porting/Glossary. |
| 400 | |
| 401 | Configure variable Default value |
| 402 | $prefix /usr/local |
| 403 | $bin $prefix/bin |
| 404 | $scriptdir $prefix/bin |
| 405 | $privlib $prefix/lib/perl5/$version |
| 406 | $archlib $prefix/lib/perl5/$version/$archname |
| 407 | $man1dir $prefix/man/man1 |
| 408 | $man3dir $prefix/man/man3 |
| 409 | $html1dir (none) |
| 410 | $html3dir (none) |
| 411 | |
| 412 | Actually, Configure recognizes the SVR3-style |
| 413 | /usr/local/man/l_man/man1 directories, if present, and uses those |
| 414 | instead. Also, if $prefix contains the string "perl", the library |
| 415 | directories are simplified as described below. For simplicity, only |
| 416 | the common style is shown here. |
| 417 | |
| 418 | =item Directories for site-specific add-on files |
| 419 | |
| 420 | After perl is installed, you may later wish to add modules (e.g. from |
| 421 | CPAN) or scripts. Configure will set up the following directories to |
| 422 | be used for installing those add-on modules and scripts. |
| 423 | |
| 424 | Configure variable Default value |
| 425 | $siteprefix $prefix |
| 426 | $sitebin $siteprefix/bin |
| 427 | $sitescript $siteprefix/bin |
| 428 | $sitelib $siteprefix/lib/perl5/site_perl/$version |
| 429 | $sitearch $siteprefix/lib/perl5/site_perl/$version/$archname |
| 430 | $siteman1 $siteprefix/man/man1 |
| 431 | $siteman3 $siteprefix/man/man3 |
| 432 | $sitehtml1 (none) |
| 433 | $sitehtml3 (none) |
| 434 | |
| 435 | By default, ExtUtils::MakeMaker will install architecture-independent |
| 436 | modules into $sitelib and architecture-dependent modules into $sitearch. |
| 437 | |
| 438 | NOTE: As of 5.6.0, ExtUtils::MakeMaker will use $sitelib and $sitearch, |
| 439 | but will not use the other site-specific directories. Volunteers to |
| 440 | fix this are needed. |
| 441 | |
| 442 | =item Directories for vendor-supplied add-on files |
| 443 | |
| 444 | Lastly, if you are building a binary distribution of perl for |
| 445 | distribution, Configure can optionally set up the following directories |
| 446 | for you to use to distribute add-on modules. |
| 447 | |
| 448 | Configure variable Default value |
| 449 | $vendorprefix (none) |
| 450 | (The next ones are set only if vendorprefix is set.) |
| 451 | $vendorbin $vendorprefix/bin |
| 452 | $vendorscript $vendorprefix/bin |
| 453 | $vendorlib $vendorprefix/lib/perl5/vendor_perl/$version |
| 454 | $vendorarch $vendorprefix/lib/perl5/vendor_perl/$version/$archname |
| 455 | $vendorman1 $vendorprefix/man/man1 |
| 456 | $vendorman3 $vendorprefix/man/man3 |
| 457 | $vendorhtml1 (none) |
| 458 | $vendorhtml3 (none) |
| 459 | |
| 460 | These are normally empty, but may be set as needed. For example, |
| 461 | a vendor might choose the following settings: |
| 462 | |
| 463 | $prefix /usr/bin |
| 464 | $siteprefix /usr/local/bin |
| 465 | $vendorprefix /usr/bin |
| 466 | |
| 467 | This would have the effect of setting the following: |
| 468 | |
| 469 | $bin /usr/bin |
| 470 | $scriptdir /usr/bin |
| 471 | $privlib /usr/lib/perl5/$version |
| 472 | $archlib /usr/lib/perl5/$version/$archname |
| 473 | $man1dir /usr/man/man1 |
| 474 | $man3dir /usr/man/man3 |
| 475 | |
| 476 | $sitebin /usr/local/bin |
| 477 | $sitescript /usr/local/bin |
| 478 | $sitelib /usr/local/lib/perl5/site_perl/$version |
| 479 | $sitearch /usr/local/lib/perl5/site_perl/$version/$archname |
| 480 | $siteman1 /usr/local/man/man1 |
| 481 | $siteman3 /usr/local/man/man3 |
| 482 | |
| 483 | $vendorbin /usr/bin |
| 484 | $vendorscript /usr/bin |
| 485 | $vendorlib /usr/lib/perl5/vendor_perl/$version |
| 486 | $vendorarch /usr/lib/perl5/vendor_perl/$version/$archname |
| 487 | $vendorman1 /usr/man/man1 |
| 488 | $vendorman3 /usr/man/man3 |
| 489 | |
| 490 | Note how in this example, the vendor-supplied directories are in the |
| 491 | /usr hierarchy, while the directories reserved for the end-user are in |
| 492 | the /usr/local hierarchy. |
| 493 | |
| 494 | NOTE: As of 5.6.0, ExtUtils::MakeMaker does not use these directories. |
| 495 | Volunteers to fix this are needed. |
| 496 | |
| 497 | The entire installed library hierarchy is installed in locations with |
| 498 | version numbers, keeping the installations of different versions distinct. |
| 499 | However, later installations of Perl can still be configured to search the |
| 500 | installed libraries corresponding to compatible earlier versions. |
| 501 | See L<"Coexistence with earlier versions of perl5"> below for more details |
| 502 | on how Perl can be made to search older version directories. |
| 503 | |
| 504 | Of course you may use these directories however you see fit. For |
| 505 | example, you may wish to use $siteprefix for site-specific files that |
| 506 | are stored locally on your own disk and use $vendorprefix for |
| 507 | site-specific files that are stored elsewhere on your organization's |
| 508 | network. One way to do that would be something like |
| 509 | |
| 510 | sh Configure -Dsiteprefix=/usr/local -Dvendorprefix=/usr/share/perl |
| 511 | |
| 512 | =item otherlibdirs |
| 513 | |
| 514 | As a final catch-all, Configure also offers an $otherlibdirs |
| 515 | variable. This variable contains a colon-separated list of additional |
| 516 | directories to add to @INC. By default, it will be empty. |
| 517 | Perl will search these directories (including architecture and |
| 518 | version-specific subdirectories) for add-on modules and extensions. |
| 519 | |
| 520 | =item Man Pages |
| 521 | |
| 522 | In versions 5.005_57 and earlier, the default was to store module man |
| 523 | pages in a version-specific directory, such as |
| 524 | /usr/local/lib/perl5/$version/man/man3. The default for 5.005_58 and |
| 525 | after is /usr/local/man/man3 so that most users can find the man pages |
| 526 | without resetting MANPATH. |
| 527 | |
| 528 | You can continue to use the old default from the command line with |
| 529 | |
| 530 | sh Configure -Dman3dir=/usr/local/lib/perl5/5.6.0/man/man3 |
| 531 | |
| 532 | Some users also prefer to use a .3pm suffix. You can do that with |
| 533 | |
| 534 | sh Configure -Dman3ext=3pm |
| 535 | |
| 536 | Again, these are just the defaults, and can be changed as you run |
| 537 | Configure. |
| 538 | |
| 539 | =item HTML pages |
| 540 | |
| 541 | As of perl5.005_57, the standard perl installation does not do |
| 542 | anything with HTML documentation, but that may change in the future. |
| 543 | Further, some add-on modules may wish to install HTML documents. The |
| 544 | html Configure variables listed above are provided if you wish to |
| 545 | specify where such documents should be placed. The default is "none", |
| 546 | but will likely eventually change to something useful based on user |
| 547 | feedback. |
| 548 | |
| 549 | =back |
| 550 | |
| 551 | Some users prefer to append a "/share" to $privlib and $sitelib |
| 552 | to emphasize that those directories can be shared among different |
| 553 | architectures. |
| 554 | |
| 555 | Note that these are just the defaults. You can actually structure the |
| 556 | directories any way you like. They don't even have to be on the same |
| 557 | filesystem. |
| 558 | |
| 559 | Further details about the installation directories, maintenance and |
| 560 | development subversions, and about supporting multiple versions are |
| 561 | discussed in L<"Coexistence with earlier versions of perl5"> below. |
| 562 | |
| 563 | If you specify a prefix that contains the string "perl", then the |
| 564 | library directory structure is slightly simplified. Instead of |
| 565 | suggesting $prefix/lib/perl5/, Configure will suggest $prefix/lib. |
| 566 | |
| 567 | Thus, for example, if you Configure with |
| 568 | -Dprefix=/opt/perl, then the default library directories for 5.6.0 are |
| 569 | |
| 570 | Configure variable Default value |
| 571 | $privlib /opt/perl/lib/5.6.0 |
| 572 | $archlib /opt/perl/lib/5.6.0/$archname |
| 573 | $sitelib /opt/perl/lib/site_perl/5.6.0 |
| 574 | $sitearch /opt/perl/lib/site_perl/5.6.0/$archname |
| 575 | |
| 576 | =head2 Changing the installation directory |
| 577 | |
| 578 | Configure distinguishes between the directory in which perl (and its |
| 579 | associated files) should be installed and the directory in which it |
| 580 | will eventually reside. For most sites, these two are the same; for |
| 581 | sites that use AFS, this distinction is handled automatically. |
| 582 | However, sites that use software such as depot to manage software |
| 583 | packages, or users building binary packages for distribution may also |
| 584 | wish to install perl into a different directory and use that |
| 585 | management software to move perl to its final destination. This |
| 586 | section describes how to do that. |
| 587 | |
| 588 | Suppose you want to install perl under the /tmp/perl5 directory. You |
| 589 | could edit config.sh and change all the install* variables to point to |
| 590 | /tmp/perl5 instead of /usr/local, or you could simply use the |
| 591 | following command line: |
| 592 | |
| 593 | sh Configure -Dinstallprefix=/tmp/perl5 |
| 594 | |
| 595 | (replace /tmp/perl5 by a directory of your choice). |
| 596 | |
| 597 | Beware, though, that if you go to try to install new add-on |
| 598 | modules, they too will get installed in under '/tmp/perl5' if you |
| 599 | follow this example. The next section shows one way of dealing with |
| 600 | that problem. |
| 601 | |
| 602 | =head2 Creating an installable tar archive |
| 603 | |
| 604 | If you need to install perl on many identical systems, it is |
| 605 | convenient to compile it once and create an archive that can be |
| 606 | installed on multiple systems. Suppose, for example, that you want to |
| 607 | create an archive that can be installed in /opt/perl. |
| 608 | Here's one way to do that: |
| 609 | |
| 610 | # Set up to install perl into a different directory, |
| 611 | # e.g. /tmp/perl5 (see previous part). |
| 612 | sh Configure -Dinstallprefix=/tmp/perl5 -Dprefix=/opt/perl -des |
| 613 | make |
| 614 | make test |
| 615 | make install # This will install everything into /tmp/perl5. |
| 616 | cd /tmp/perl5 |
| 617 | # Edit $archlib/Config.pm and $archlib/.packlist to change all the |
| 618 | # install* variables back to reflect where everything will |
| 619 | # really be installed. (That is, change /tmp/perl5 to /opt/perl |
| 620 | # everywhere in those files.) |
| 621 | # Check the scripts in $scriptdir to make sure they have the correct |
| 622 | # #!/wherever/perl line. |
| 623 | tar cvf ../perl5-archive.tar . |
| 624 | # Then, on each machine where you want to install perl, |
| 625 | cd /opt/perl # Or wherever you specified as $prefix |
| 626 | tar xvf perl5-archive.tar |
| 627 | |
| 628 | =head2 Site-wide Policy settings |
| 629 | |
| 630 | After Configure runs, it stores a number of common site-wide "policy" |
| 631 | answers (such as installation directories and the local perl contact |
| 632 | person) in the Policy.sh file. If you want to build perl on another |
| 633 | system using the same policy defaults, simply copy the Policy.sh file |
| 634 | to the new system and Configure will use it along with the appropriate |
| 635 | hint file for your system. |
| 636 | |
| 637 | Alternatively, if you wish to change some or all of those policy |
| 638 | answers, you should |
| 639 | |
| 640 | rm -f Policy.sh |
| 641 | |
| 642 | to ensure that Configure doesn't re-use them. |
| 643 | |
| 644 | Further information is in the Policy_sh.SH file itself. |
| 645 | |
| 646 | If the generated Policy.sh file is unsuitable, you may freely edit it |
| 647 | to contain any valid shell commands. It will be run just after the |
| 648 | platform-specific hints files. |
| 649 | |
| 650 | Note: Since the directory hierarchy for 5.6.0 contains a number of |
| 651 | new vendor* and site* entries, your Policy.sh file will probably not |
| 652 | set them to your desired values. I encourage you to run Configure |
| 653 | interactively to be sure it puts things where you want them. |
| 654 | |
| 655 | =head2 Configure-time Options |
| 656 | |
| 657 | There are several different ways to Configure and build perl for your |
| 658 | system. For most users, the defaults are sensible and will work. |
| 659 | Some users, however, may wish to further customize perl. Here are |
| 660 | some of the main things you can change. |
| 661 | |
| 662 | =head2 Threads |
| 663 | |
| 664 | On some platforms, perl5.005 and later can be compiled with |
| 665 | experimental support for threads. To enable this, read the file |
| 666 | README.threads, and then try: |
| 667 | |
| 668 | sh Configure -Dusethreads |
| 669 | |
| 670 | Currently, you need to specify -Dusethreads on the Configure command |
| 671 | line so that the hint files can make appropriate adjustments. |
| 672 | |
| 673 | The default is to compile without thread support. |
| 674 | |
| 675 | As of v5.5.64, perl has two different internal threads implementations. |
| 676 | The 5.005 version (5005threads) and an interpreter-based implementation |
| 677 | (ithreads) with one interpreter per thread. By default, Configure selects |
| 678 | ithreads if -Dusethreads is specified. However, you can select the old |
| 679 | 5005threads behavior instead by either |
| 680 | |
| 681 | sh Configure -Dusethreads -Duse5005threads |
| 682 | |
| 683 | or by |
| 684 | sh Configure -Dusethreads -Uuseithreads |
| 685 | |
| 686 | Eventually (by perl v5.6.0) this internal confusion ought to disappear, |
| 687 | and these options may disappear as well. |
| 688 | |
| 689 | =head2 64 bit support. |
| 690 | |
| 691 | If your platform does not have 64 bits natively, but can simulate them with |
| 692 | compiler flags and/or C<long long> or C<int64_t>, you can build a perl that |
| 693 | uses 64 bits. |
| 694 | |
| 695 | There are actually two modes of 64-bitness: the first one is achieved |
| 696 | using Configure -Duse64bitint and the second one using Configure |
| 697 | -Duse64bitall. The difference is that the first one is minimal and |
| 698 | the second one maximal. The first works in more places than the second. |
| 699 | |
| 700 | The C<use64bitint> does only as much as is required to get 64-bit |
| 701 | integers into Perl (this may mean, for example, using "long longs") |
| 702 | while your memory may still be limited to 2 gigabytes (because your |
| 703 | pointers could still be 32-bit). Note that the name C<64bitint> does |
| 704 | not imply that your C compiler will be using 64-bit C<int>s (it might, |
| 705 | but it doesn't have to): the C<use64bitint> means that you will be |
| 706 | able to have 64 bits wide scalar values. |
| 707 | |
| 708 | The C<use64bitall> goes all the way by attempting to switch also |
| 709 | integers (if it can), longs (and pointers) to being 64-bit. This may |
| 710 | create an even more binary incompatible Perl than -Duse64bitint: the |
| 711 | resulting executable may not run at all in a 32-bit box, or you may |
| 712 | have to reboot/reconfigure/rebuild your operating system to be 64-bit |
| 713 | aware. |
| 714 | |
| 715 | Natively 64-bit systems like Alpha and Cray need neither -Duse64bitint |
| 716 | nor -Duse64bitall. |
| 717 | |
| 718 | NOTE: 64-bit support is still experimental on most platforms. |
| 719 | Existing support only covers the LP64 data model. In particular, the |
| 720 | LLP64 data model is not yet supported. 64-bit libraries and system |
| 721 | APIs on many platforms have not stabilized--your mileage may vary. |
| 722 | |
| 723 | =head2 Long doubles |
| 724 | |
| 725 | In some systems you may be able to use long doubles to enhance the |
| 726 | range and precision of your double precision floating point numbers |
| 727 | (that is, Perl's numbers). Use Configure -Duselongdouble to enable |
| 728 | this support (if it is available). |
| 729 | |
| 730 | =head2 "more bits" |
| 731 | |
| 732 | You can "Configure -Dusemorebits" to turn on both the 64-bit support |
| 733 | and the long double support. |
| 734 | |
| 735 | =head2 Selecting File IO mechanisms |
| 736 | |
| 737 | Previous versions of perl used the standard IO mechanisms as defined in |
| 738 | stdio.h. Versions 5.003_02 and later of perl allow alternate IO |
| 739 | mechanisms via a "PerlIO" abstraction, but the stdio mechanism is still |
| 740 | the default and is the only supported mechanism. |
| 741 | |
| 742 | This PerlIO abstraction can be enabled either on the Configure command |
| 743 | line with |
| 744 | |
| 745 | sh Configure -Duseperlio |
| 746 | |
| 747 | or interactively at the appropriate Configure prompt. |
| 748 | |
| 749 | If you choose to use the PerlIO abstraction layer, there are two |
| 750 | (experimental) possibilities for the underlying IO calls. These have been |
| 751 | tested to some extent on some platforms, but are not guaranteed to work |
| 752 | everywhere. |
| 753 | |
| 754 | =over 4 |
| 755 | |
| 756 | =item 1. |
| 757 | |
| 758 | AT&T's "sfio". This has superior performance to stdio.h in many |
| 759 | cases, and is extensible by the use of "discipline" modules. Sfio |
| 760 | currently only builds on a subset of the UNIX platforms perl supports. |
| 761 | Because the data structures are completely different from stdio, perl |
| 762 | extension modules or external libraries may not work. This |
| 763 | configuration exists to allow these issues to be worked on. |
| 764 | |
| 765 | This option requires the 'sfio' package to have been built and installed. |
| 766 | The latest sfio is available from http://www.research.att.com/sw/tools/sfio/ |
| 767 | |
| 768 | You select this option by |
| 769 | |
| 770 | sh Configure -Duseperlio -Dusesfio |
| 771 | |
| 772 | If you have already selected -Duseperlio, and if Configure detects |
| 773 | that you have sfio, then sfio will be the default suggested by |
| 774 | Configure. |
| 775 | |
| 776 | Note: On some systems, sfio's iffe configuration script fails to |
| 777 | detect that you have an atexit function (or equivalent). Apparently, |
| 778 | this is a problem at least for some versions of Linux and SunOS 4. |
| 779 | Configure should detect this problem and warn you about problems with |
| 780 | _exit vs. exit. If you have this problem, the fix is to go back to |
| 781 | your sfio sources and correct iffe's guess about atexit. |
| 782 | |
| 783 | =item 2. |
| 784 | |
| 785 | Normal stdio IO, but with all IO going through calls to the PerlIO |
| 786 | abstraction layer. This configuration can be used to check that perl and |
| 787 | extension modules have been correctly converted to use the PerlIO |
| 788 | abstraction. |
| 789 | |
| 790 | This configuration should work on all platforms (but might not). |
| 791 | |
| 792 | You select this option via: |
| 793 | |
| 794 | sh Configure -Duseperlio -Uusesfio |
| 795 | |
| 796 | If you have already selected -Duseperlio, and if Configure does not |
| 797 | detect sfio, then this will be the default suggested by Configure. |
| 798 | |
| 799 | =back |
| 800 | |
| 801 | =head2 SOCKS |
| 802 | |
| 803 | Perl can be configured to be 'socksified', that is, to use the SOCKS |
| 804 | TCP/IP proxy protocol library. SOCKS is used to give applications |
| 805 | access to transport layer network proxies. Perl supports only SOCKS |
| 806 | Version 5. You can find more about SOCKS from http://www.socks.nec.com/ |
| 807 | |
| 808 | =head2 Dynamic Loading |
| 809 | |
| 810 | By default, Configure will compile perl to use dynamic loading if |
| 811 | your system supports it. If you want to force perl to be compiled |
| 812 | statically, you can either choose this when Configure prompts you or |
| 813 | you can use the Configure command line option -Uusedl. |
| 814 | |
| 815 | =head2 Building a shared libperl.so Perl library |
| 816 | |
| 817 | Currently, for most systems, the main perl executable is built by |
| 818 | linking the "perl library" libperl.a with perlmain.o, your static |
| 819 | extensions (usually just DynaLoader.a) and various extra libraries, |
| 820 | such as -lm. |
| 821 | |
| 822 | On some systems that support dynamic loading, it may be possible to |
| 823 | replace libperl.a with a shared libperl.so. If you anticipate building |
| 824 | several different perl binaries (e.g. by embedding libperl into |
| 825 | different programs, or by using the optional compiler extension), then |
| 826 | you might wish to build a shared libperl.so so that all your binaries |
| 827 | can share the same library. |
| 828 | |
| 829 | The disadvantages are that there may be a significant performance |
| 830 | penalty associated with the shared libperl.so, and that the overall |
| 831 | mechanism is still rather fragile with respect to different versions |
| 832 | and upgrades. |
| 833 | |
| 834 | In terms of performance, on my test system (Solaris 2.5_x86) the perl |
| 835 | test suite took roughly 15% longer to run with the shared libperl.so. |
| 836 | Your system and typical applications may well give quite different |
| 837 | results. |
| 838 | |
| 839 | The default name for the shared library is typically something like |
| 840 | libperl.so.3.2 (for Perl 5.003_02) or libperl.so.302 or simply |
| 841 | libperl.so. Configure tries to guess a sensible naming convention |
| 842 | based on your C library name. Since the library gets installed in a |
| 843 | version-specific architecture-dependent directory, the exact name |
| 844 | isn't very important anyway, as long as your linker is happy. |
| 845 | |
| 846 | For some systems (mostly SVR4), building a shared libperl is required |
| 847 | for dynamic loading to work, and hence is already the default. |
| 848 | |
| 849 | You can elect to build a shared libperl by |
| 850 | |
| 851 | sh Configure -Duseshrplib |
| 852 | |
| 853 | To build a shared libperl, the environment variable controlling shared |
| 854 | library search (LD_LIBRARY_PATH in most systems, DYLD_LIBRARY_PATH for |
| 855 | NeXTSTEP/OPENSTEP/Darwin, LIBRARY_PATH for BeOS, SHLIB_PATH for |
| 856 | HP-UX, LIBPATH for AIX, PATH for Cygwin) must be set up to include |
| 857 | the Perl build directory because that's where the shared libperl will |
| 858 | be created. Configure arranges makefile to have the correct shared |
| 859 | library search settings. |
| 860 | |
| 861 | However, there are some special cases where manually setting the |
| 862 | shared library path might be required. For example, if you want to run |
| 863 | something like the following with the newly-built but not-yet-installed |
| 864 | ./perl: |
| 865 | |
| 866 | cd t; ./perl misc/failing_test.t |
| 867 | or |
| 868 | ./perl -Ilib ~/my_mission_critical_test |
| 869 | |
| 870 | then you need to set up the shared library path explicitly. |
| 871 | You can do this with |
| 872 | |
| 873 | LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH |
| 874 | |
| 875 | for Bourne-style shells, or |
| 876 | |
| 877 | setenv LD_LIBRARY_PATH `pwd` |
| 878 | |
| 879 | for Csh-style shells. (This procedure may also be needed if for some |
| 880 | unexpected reason Configure fails to set up makefile correctly.) |
| 881 | |
| 882 | You can often recognize failures to build/use a shared libperl from error |
| 883 | messages complaining about a missing libperl.so (or libperl.sl in HP-UX), |
| 884 | for example: |
| 885 | 18126:./miniperl: /sbin/loader: Fatal Error: cannot map libperl.so |
| 886 | |
| 887 | There is also an potential problem with the shared perl library if you |
| 888 | want to have more than one "flavor" of the same version of perl (e.g. |
| 889 | with and without -DDEBUGGING). For example, suppose you build and |
| 890 | install a standard Perl 5.004 with a shared library. Then, suppose you |
| 891 | try to build Perl 5.004 with -DDEBUGGING enabled, but everything else |
| 892 | the same, including all the installation directories. How can you |
| 893 | ensure that your newly built perl will link with your newly built |
| 894 | libperl.so.4 rather with the installed libperl.so.4? The answer is |
| 895 | that you might not be able to. The installation directory is encoded |
| 896 | in the perl binary with the LD_RUN_PATH environment variable (or |
| 897 | equivalent ld command-line option). On Solaris, you can override that |
| 898 | with LD_LIBRARY_PATH; on Linux you can't. On Digital Unix, you can |
| 899 | override LD_LIBRARY_PATH by setting the _RLD_ROOT environment variable |
| 900 | to point to the perl build directory. |
| 901 | |
| 902 | The only reliable answer is that you should specify a different |
| 903 | directory for the architecture-dependent library for your -DDEBUGGING |
| 904 | version of perl. You can do this by changing all the *archlib* |
| 905 | variables in config.sh to point to your new architecture-dependent library. |
| 906 | |
| 907 | =head2 Malloc Issues |
| 908 | |
| 909 | Perl relies heavily on malloc(3) to grow data structures as needed, |
| 910 | so perl's performance can be noticeably affected by the performance of |
| 911 | the malloc function on your system. The perl source is shipped with a |
| 912 | version of malloc that has been optimized for the typical requests from |
| 913 | perl, so there's a chance that it may be both faster and use less memory |
| 914 | than your system malloc. |
| 915 | |
| 916 | However, if your system already has an excellent malloc, or if you are |
| 917 | experiencing difficulties with extensions that use third-party libraries |
| 918 | that call malloc, then you should probably use your system's malloc. |
| 919 | (Or, you might wish to explore the malloc flags discussed below.) |
| 920 | |
| 921 | =over 4 |
| 922 | |
| 923 | =item Using the system malloc |
| 924 | |
| 925 | To build without perl's malloc, you can use the Configure command |
| 926 | |
| 927 | sh Configure -Uusemymalloc |
| 928 | |
| 929 | or you can answer 'n' at the appropriate interactive Configure prompt. |
| 930 | |
| 931 | =item -DPERL_POLLUTE_MALLOC |
| 932 | |
| 933 | NOTE: This flag is enabled automatically on some platforms if you |
| 934 | asked for binary compatibility with version 5.005, or if you just |
| 935 | run Configure to accept all the defaults on those platforms. You |
| 936 | can refuse the automatic binary compatibility flags wholesale by |
| 937 | running: |
| 938 | |
| 939 | sh Configure -Ubincompat5005 |
| 940 | |
| 941 | or by answering 'n' at the appropriate prompt. |
| 942 | |
| 943 | Perl's malloc family of functions are called Perl_malloc(), |
| 944 | Perl_realloc(), Perl_calloc() and Perl_mfree(). When this flag is |
| 945 | not enabled, the names do not clash with the system versions of |
| 946 | these functions. |
| 947 | |
| 948 | If enabled, Perl's malloc family of functions will have the same |
| 949 | names as the system versions. This may be sometimes required when you |
| 950 | have libraries that like to free() data that may have been allocated |
| 951 | by Perl_malloc() and vice versa. |
| 952 | |
| 953 | Note that enabling this option may sometimes lead to duplicate symbols |
| 954 | from the linker for malloc et al. In such cases, the system probably |
| 955 | does not allow its malloc functions to be fully replaced with custom |
| 956 | versions. |
| 957 | |
| 958 | =back |
| 959 | |
| 960 | =head2 Building a debugging perl |
| 961 | |
| 962 | You can run perl scripts under the perl debugger at any time with |
| 963 | B<perl -d your_script>. If, however, you want to debug perl itself, |
| 964 | you probably want to do |
| 965 | |
| 966 | sh Configure -Doptimize='-g' |
| 967 | |
| 968 | This will do two independent things: First, it will force compilation |
| 969 | to use cc -g so that you can use your system's debugger on the |
| 970 | executable. (Note: Your system may actually require something like |
| 971 | cc -g2. Check your man pages for cc(1) and also any hint file for |
| 972 | your system.) Second, it will add -DDEBUGGING to your ccflags |
| 973 | variable in config.sh so that you can use B<perl -D> to access perl's |
| 974 | internal state. (Note: Configure will only add -DDEBUGGING by default |
| 975 | if you are not reusing your old config.sh. If you want to reuse your |
| 976 | old config.sh, then you can just edit it and change the optimize and |
| 977 | ccflags variables by hand and then propagate your changes as shown in |
| 978 | L<"Propagating your changes to config.sh"> below.) |
| 979 | |
| 980 | You can actually specify -g and -DDEBUGGING independently, but usually |
| 981 | it's convenient to have both. |
| 982 | |
| 983 | If you are using a shared libperl, see the warnings about multiple |
| 984 | versions of perl under L<Building a shared libperl.so Perl library>. |
| 985 | |
| 986 | =head2 Extensions |
| 987 | |
| 988 | By default, Configure will offer to build every extension which appears |
| 989 | to be supported. For example, Configure will offer to build GDBM_File |
| 990 | only if it is able to find the gdbm library. (See examples below.) |
| 991 | B, DynaLoader, Fcntl, IO, and attrs are always built by default. |
| 992 | Configure does not contain code to test for POSIX compliance, so POSIX |
| 993 | is always built by default as well. If you wish to skip POSIX, you can |
| 994 | set the Configure variable useposix=false either in a hint file or from |
| 995 | the Configure command line. Similarly, the Opcode extension is always |
| 996 | built by default, but you can skip it by setting the Configure variable |
| 997 | useopcode=false either in a hint file for from the command line. |
| 998 | |
| 999 | If you unpack any additional extensions in the ext/ directory before |
| 1000 | running Configure, then Configure will offer to build those additional |
| 1001 | extensions as well. Most users probably shouldn't have to do this -- |
| 1002 | it is usually easier to build additional extensions later after perl |
| 1003 | has been installed. However, if you wish to have those additional |
| 1004 | extensions statically linked into the perl binary, then this offers a |
| 1005 | convenient way to do that in one step. (It is not necessary, however; |
| 1006 | you can build and install extensions just fine even if you don't have |
| 1007 | dynamic loading. See lib/ExtUtils/MakeMaker.pm for more details.) |
| 1008 | |
| 1009 | You can learn more about each of the supplied extensions by consulting the |
| 1010 | documentation in the individual .pm modules, located under the |
| 1011 | ext/ subdirectory. |
| 1012 | |
| 1013 | Even if you do not have dynamic loading, you must still build the |
| 1014 | DynaLoader extension; you should just build the stub dl_none.xs |
| 1015 | version. (Configure will suggest this as the default.) |
| 1016 | |
| 1017 | In summary, here are the Configure command-line variables you can set |
| 1018 | to turn off each extension: |
| 1019 | |
| 1020 | B (Always included by default) |
| 1021 | DB_File i_db |
| 1022 | DynaLoader (Must always be included as a static extension) |
| 1023 | Fcntl (Always included by default) |
| 1024 | GDBM_File i_gdbm |
| 1025 | IO (Always included by default) |
| 1026 | NDBM_File i_ndbm |
| 1027 | ODBM_File i_dbm |
| 1028 | POSIX useposix |
| 1029 | SDBM_File (Always included by default) |
| 1030 | Opcode useopcode |
| 1031 | Socket d_socket |
| 1032 | Threads use5005threads |
| 1033 | attrs (Always included by default) |
| 1034 | |
| 1035 | Thus to skip the NDBM_File extension, you can use |
| 1036 | |
| 1037 | sh Configure -Ui_ndbm |
| 1038 | |
| 1039 | Again, this is taken care of automatically if you don't have the ndbm |
| 1040 | library. |
| 1041 | |
| 1042 | Of course, you may always run Configure interactively and select only |
| 1043 | the extensions you want. |
| 1044 | |
| 1045 | Note: The DB_File module will only work with version 1.x of Berkeley |
| 1046 | DB or newer releases of version 2. Configure will automatically detect |
| 1047 | this for you and refuse to try to build DB_File with earlier |
| 1048 | releases of version 2. |
| 1049 | |
| 1050 | If you re-use your old config.sh but change your system (e.g. by |
| 1051 | adding libgdbm) Configure will still offer your old choices of extensions |
| 1052 | for the default answer, but it will also point out the discrepancy to |
| 1053 | you. |
| 1054 | |
| 1055 | Finally, if you have dynamic loading (most modern Unix systems do) |
| 1056 | remember that these extensions do not increase the size of your perl |
| 1057 | executable, nor do they impact start-up time, so you probably might as |
| 1058 | well build all the ones that will work on your system. |
| 1059 | |
| 1060 | =head2 Including locally-installed libraries |
| 1061 | |
| 1062 | Perl5 comes with interfaces to number of database extensions, including |
| 1063 | dbm, ndbm, gdbm, and Berkeley db. For each extension, if |
| 1064 | Configure can find the appropriate header files and libraries, it will |
| 1065 | automatically include that extension. The gdbm and db libraries |
| 1066 | are not included with perl. See the library documentation for |
| 1067 | how to obtain the libraries. |
| 1068 | |
| 1069 | If your database header (.h) files are not in a directory normally |
| 1070 | searched by your C compiler, then you will need to include the |
| 1071 | appropriate -I/your/directory option when prompted by Configure. If |
| 1072 | your database library (.a) files are not in a directory normally |
| 1073 | searched by your C compiler and linker, then you will need to include |
| 1074 | the appropriate -L/your/directory option when prompted by Configure. |
| 1075 | See the examples below. |
| 1076 | |
| 1077 | =head2 Examples |
| 1078 | |
| 1079 | =over 4 |
| 1080 | |
| 1081 | =item gdbm in /usr/local |
| 1082 | |
| 1083 | Suppose you have gdbm and want Configure to find it and build the |
| 1084 | GDBM_File extension. This example assumes you have gdbm.h |
| 1085 | installed in /usr/local/include/gdbm.h and libgdbm.a installed in |
| 1086 | /usr/local/lib/libgdbm.a. Configure should figure all the |
| 1087 | necessary steps out automatically. |
| 1088 | |
| 1089 | Specifically, when Configure prompts you for flags for |
| 1090 | your C compiler, you should include -I/usr/local/include. |
| 1091 | |
| 1092 | When Configure prompts you for linker flags, you should include |
| 1093 | -L/usr/local/lib. |
| 1094 | |
| 1095 | If you are using dynamic loading, then when Configure prompts you for |
| 1096 | linker flags for dynamic loading, you should again include |
| 1097 | -L/usr/local/lib. |
| 1098 | |
| 1099 | Again, this should all happen automatically. This should also work if |
| 1100 | you have gdbm installed in any of (/usr/local, /opt/local, /usr/gnu, |
| 1101 | /opt/gnu, /usr/GNU, or /opt/GNU). |
| 1102 | |
| 1103 | =item gdbm in /usr/you |
| 1104 | |
| 1105 | Suppose you have gdbm installed in some place other than /usr/local/, |
| 1106 | but you still want Configure to find it. To be specific, assume you |
| 1107 | have /usr/you/include/gdbm.h and /usr/you/lib/libgdbm.a. You |
| 1108 | still have to add -I/usr/you/include to cc flags, but you have to take |
| 1109 | an extra step to help Configure find libgdbm.a. Specifically, when |
| 1110 | Configure prompts you for library directories, you have to add |
| 1111 | /usr/you/lib to the list. |
| 1112 | |
| 1113 | It is possible to specify this from the command line too (all on one |
| 1114 | line): |
| 1115 | |
| 1116 | sh Configure -de \ |
| 1117 | -Dlocincpth="/usr/you/include" \ |
| 1118 | -Dloclibpth="/usr/you/lib" |
| 1119 | |
| 1120 | locincpth is a space-separated list of include directories to search. |
| 1121 | Configure will automatically add the appropriate -I directives. |
| 1122 | |
| 1123 | loclibpth is a space-separated list of library directories to search. |
| 1124 | Configure will automatically add the appropriate -L directives. If |
| 1125 | you have some libraries under /usr/local/ and others under |
| 1126 | /usr/you, then you have to include both, namely |
| 1127 | |
| 1128 | sh Configure -de \ |
| 1129 | -Dlocincpth="/usr/you/include /usr/local/include" \ |
| 1130 | -Dloclibpth="/usr/you/lib /usr/local/lib" |
| 1131 | |
| 1132 | =back |
| 1133 | |
| 1134 | =head2 What if it doesn't work? |
| 1135 | |
| 1136 | If you run into problems, try some of the following ideas. |
| 1137 | If none of them help, then see L<"Reporting Problems"> below. |
| 1138 | |
| 1139 | =over 4 |
| 1140 | |
| 1141 | =item Running Configure Interactively |
| 1142 | |
| 1143 | If Configure runs into trouble, remember that you can always run |
| 1144 | Configure interactively so that you can check (and correct) its |
| 1145 | guesses. |
| 1146 | |
| 1147 | All the installation questions have been moved to the top, so you don't |
| 1148 | have to wait for them. Once you've handled them (and your C compiler and |
| 1149 | flags) you can type &-d at the next Configure prompt and Configure |
| 1150 | will use the defaults from then on. |
| 1151 | |
| 1152 | If you find yourself trying obscure command line incantations and |
| 1153 | config.over tricks, I recommend you run Configure interactively |
| 1154 | instead. You'll probably save yourself time in the long run. |
| 1155 | |
| 1156 | =item Hint files |
| 1157 | |
| 1158 | The perl distribution includes a number of system-specific hints files |
| 1159 | in the hints/ directory. If one of them matches your system, Configure |
| 1160 | will offer to use that hint file. |
| 1161 | |
| 1162 | Several of the hint files contain additional important information. |
| 1163 | If you have any problems, it is a good idea to read the relevant hint file |
| 1164 | for further information. See hints/solaris_2.sh for an extensive example. |
| 1165 | More information about writing good hints is in the hints/README.hints |
| 1166 | file. |
| 1167 | |
| 1168 | =item *** WHOA THERE!!! *** |
| 1169 | |
| 1170 | Occasionally, Configure makes a wrong guess. For example, on SunOS |
| 1171 | 4.1.3, Configure incorrectly concludes that tzname[] is in the |
| 1172 | standard C library. The hint file is set up to correct for this. You |
| 1173 | will see a message: |
| 1174 | |
| 1175 | *** WHOA THERE!!! *** |
| 1176 | The recommended value for $d_tzname on this machine was "undef"! |
| 1177 | Keep the recommended value? [y] |
| 1178 | |
| 1179 | You should always keep the recommended value unless, after reading the |
| 1180 | relevant section of the hint file, you are sure you want to try |
| 1181 | overriding it. |
| 1182 | |
| 1183 | If you are re-using an old config.sh, the word "previous" will be |
| 1184 | used instead of "recommended". Again, you will almost always want |
| 1185 | to keep the previous value, unless you have changed something on your |
| 1186 | system. |
| 1187 | |
| 1188 | For example, suppose you have added libgdbm.a to your system |
| 1189 | and you decide to reconfigure perl to use GDBM_File. When you run |
| 1190 | Configure again, you will need to add -lgdbm to the list of libraries. |
| 1191 | Now, Configure will find your gdbm include file and library and will |
| 1192 | issue a message: |
| 1193 | |
| 1194 | *** WHOA THERE!!! *** |
| 1195 | The previous value for $i_gdbm on this machine was "undef"! |
| 1196 | Keep the previous value? [y] |
| 1197 | |
| 1198 | In this case, you do not want to keep the previous value, so you |
| 1199 | should answer 'n'. (You'll also have to manually add GDBM_File to |
| 1200 | the list of dynamic extensions to build.) |
| 1201 | |
| 1202 | =item Changing Compilers |
| 1203 | |
| 1204 | If you change compilers or make other significant changes, you should |
| 1205 | probably not re-use your old config.sh. Simply remove it or |
| 1206 | rename it, e.g. mv config.sh config.sh.old. Then rerun Configure |
| 1207 | with the options you want to use. |
| 1208 | |
| 1209 | This is a common source of problems. If you change from cc to |
| 1210 | gcc, you should almost always remove your old config.sh. |
| 1211 | |
| 1212 | =item Propagating your changes to config.sh |
| 1213 | |
| 1214 | If you make any changes to config.sh, you should propagate |
| 1215 | them to all the .SH files by running |
| 1216 | |
| 1217 | sh Configure -S |
| 1218 | |
| 1219 | You will then have to rebuild by running |
| 1220 | |
| 1221 | make depend |
| 1222 | make |
| 1223 | |
| 1224 | =item config.over |
| 1225 | |
| 1226 | You can also supply a shell script config.over to over-ride Configure's |
| 1227 | guesses. It will get loaded up at the very end, just before config.sh |
| 1228 | is created. You have to be careful with this, however, as Configure |
| 1229 | does no checking that your changes make sense. |
| 1230 | |
| 1231 | =item config.h |
| 1232 | |
| 1233 | Many of the system dependencies are contained in config.h. |
| 1234 | Configure builds config.h by running the config_h.SH script. |
| 1235 | The values for the variables are taken from config.sh. |
| 1236 | |
| 1237 | If there are any problems, you can edit config.h directly. Beware, |
| 1238 | though, that the next time you run Configure, your changes will be |
| 1239 | lost. |
| 1240 | |
| 1241 | =item cflags |
| 1242 | |
| 1243 | If you have any additional changes to make to the C compiler command |
| 1244 | line, they can be made in cflags.SH. For instance, to turn off the |
| 1245 | optimizer on toke.c, find the line in the switch structure for |
| 1246 | toke.c and put the command optimize='-g' before the ;; . You |
| 1247 | can also edit cflags directly, but beware that your changes will be |
| 1248 | lost the next time you run Configure. |
| 1249 | |
| 1250 | To explore various ways of changing ccflags from within a hint file, |
| 1251 | see the file hints/README.hints. |
| 1252 | |
| 1253 | To change the C flags for all the files, edit config.sh and change either |
| 1254 | $ccflags or $optimize, and then re-run |
| 1255 | |
| 1256 | sh Configure -S |
| 1257 | make depend |
| 1258 | |
| 1259 | =item No sh |
| 1260 | |
| 1261 | If you don't have sh, you'll have to copy the sample file |
| 1262 | Porting/config.sh to config.sh and edit your config.sh to reflect your |
| 1263 | system's peculiarities. See Porting/pumpkin.pod for more information. |
| 1264 | You'll probably also have to extensively modify the extension building |
| 1265 | mechanism. |
| 1266 | |
| 1267 | =item Environment variable clashes |
| 1268 | |
| 1269 | Configure uses a CONFIG variable that is reported to cause trouble on |
| 1270 | ReliantUnix 5.44. If your system sets this variable, you can try |
| 1271 | unsetting it before you run Configure. Configure should eventually |
| 1272 | be fixed to avoid polluting the namespace of the environment. |
| 1273 | |
| 1274 | =item Digital UNIX/Tru64 UNIX and BIN_SH |
| 1275 | |
| 1276 | In Digital UNIX/Tru64 UNIX, Configure might abort with |
| 1277 | |
| 1278 | Build a threading Perl? [n] |
| 1279 | Configure[2437]: Syntax error at line 1 : `config.sh' is not expected. |
| 1280 | |
| 1281 | This indicates that Configure is being run with a broken Korn shell |
| 1282 | (even though you think you are using a Bourne shell by using |
| 1283 | "sh Configure" or "./Configure"). The Korn shell bug has been reported |
| 1284 | to Compaq as of February 1999 but in the meanwhile, the reason ksh is |
| 1285 | being used is that you have the environment variable BIN_SH set to |
| 1286 | 'xpg4'. This causes /bin/sh to delegate its duties to /bin/posix/sh |
| 1287 | (a ksh). Unset the environment variable and rerun Configure. |
| 1288 | |
| 1289 | =item HP-UX 11, pthreads, and libgdbm |
| 1290 | |
| 1291 | If you are running Configure with -Dusethreads in HP-UX 11, be warned |
| 1292 | that POSIX threads and libgdbm (the GNU dbm library) compiled before |
| 1293 | HP-UX 11 do not mix. This will cause a basic test run by Configure to |
| 1294 | fail |
| 1295 | |
| 1296 | Pthread internal error: message: __libc_reinit() failed, file: ../pthreads/pthread.c, line: 1096 |
| 1297 | Return Pointer is 0xc082bf33 |
| 1298 | sh: 5345 Quit(coredump) |
| 1299 | |
| 1300 | and Configure will give up. The cure is to recompile and install |
| 1301 | libgdbm under HP-UX 11. |
| 1302 | |
| 1303 | =item Porting information |
| 1304 | |
| 1305 | Specific information for the OS/2, Plan9, VMS and Win32 ports is in the |
| 1306 | corresponding README files and subdirectories. Additional information, |
| 1307 | including a glossary of all those config.sh variables, is in the Porting |
| 1308 | subdirectory. Especially Porting/Glossary should come in handy. |
| 1309 | |
| 1310 | Ports for other systems may also be available. You should check out |
| 1311 | http://www.perl.com/CPAN/ports for current information on ports to |
| 1312 | various other operating systems. |
| 1313 | |
| 1314 | If you plan to port Perl to a new architecture study carefully the |
| 1315 | section titled "Philosophical Issues in Patching and Porting Perl" |
| 1316 | in the file Porting/pumpkin.pod and the file Porting/patching.pod. |
| 1317 | Study also how other non-UNIX ports have solved problems. |
| 1318 | |
| 1319 | =back |
| 1320 | |
| 1321 | =head1 make depend |
| 1322 | |
| 1323 | This will look for all the includes. The output is stored in makefile. |
| 1324 | The only difference between Makefile and makefile is the dependencies at |
| 1325 | the bottom of makefile. If you have to make any changes, you should edit |
| 1326 | makefile, not Makefile since the Unix make command reads makefile first. |
| 1327 | (On non-Unix systems, the output may be stored in a different file. |
| 1328 | Check the value of $firstmakefile in your config.sh if in doubt.) |
| 1329 | |
| 1330 | Configure will offer to do this step for you, so it isn't listed |
| 1331 | explicitly above. |
| 1332 | |
| 1333 | =head1 make |
| 1334 | |
| 1335 | This will attempt to make perl in the current directory. |
| 1336 | |
| 1337 | =head2 What if it doesn't work? |
| 1338 | |
| 1339 | If you can't compile successfully, try some of the following ideas. |
| 1340 | If none of them help, and careful reading of the error message and |
| 1341 | the relevant manual pages on your system doesn't help, |
| 1342 | then see L<"Reporting Problems"> below. |
| 1343 | |
| 1344 | =over 4 |
| 1345 | |
| 1346 | =item hints |
| 1347 | |
| 1348 | If you used a hint file, try reading the comments in the hint file |
| 1349 | for further tips and information. |
| 1350 | |
| 1351 | =item extensions |
| 1352 | |
| 1353 | If you can successfully build miniperl, but the process crashes |
| 1354 | during the building of extensions, you should run |
| 1355 | |
| 1356 | make minitest |
| 1357 | |
| 1358 | to test your version of miniperl. |
| 1359 | |
| 1360 | =item locale |
| 1361 | |
| 1362 | If you have any locale-related environment variables set, try unsetting |
| 1363 | them. I have some reports that some versions of IRIX hang while |
| 1364 | running B<./miniperl configpm> with locales other than the C locale. |
| 1365 | See the discussion under L<"make test"> below about locales and the |
| 1366 | whole L<"Locale problems"> section in the file pod/perllocale.pod. |
| 1367 | The latter is especially useful if you see something like this |
| 1368 | |
| 1369 | perl: warning: Setting locale failed. |
| 1370 | perl: warning: Please check that your locale settings: |
| 1371 | LC_ALL = "En_US", |
| 1372 | LANG = (unset) |
| 1373 | are supported and installed on your system. |
| 1374 | perl: warning: Falling back to the standard locale ("C"). |
| 1375 | |
| 1376 | at Perl startup. |
| 1377 | |
| 1378 | =item varargs |
| 1379 | |
| 1380 | If you get varargs problems with gcc, be sure that gcc is installed |
| 1381 | correctly and that you are not passing -I/usr/include to gcc. When using |
| 1382 | gcc, you should probably have i_stdarg='define' and i_varargs='undef' |
| 1383 | in config.sh. The problem is usually solved by running fixincludes |
| 1384 | correctly. If you do change config.sh, don't forget to propagate |
| 1385 | your changes (see L<"Propagating your changes to config.sh"> below). |
| 1386 | See also the L<"vsprintf"> item below. |
| 1387 | |
| 1388 | =item util.c |
| 1389 | |
| 1390 | If you get error messages such as the following (the exact line |
| 1391 | numbers and function name may vary in different versions of perl): |
| 1392 | |
| 1393 | util.c: In function `Perl_form': |
| 1394 | util.c:1107: number of arguments doesn't match prototype |
| 1395 | proto.h:125: prototype declaration |
| 1396 | |
| 1397 | it might well be a symptom of the gcc "varargs problem". See the |
| 1398 | previous L<"varargs"> item. |
| 1399 | |
| 1400 | =item Solaris and SunOS dynamic loading |
| 1401 | |
| 1402 | If you have problems with dynamic loading using gcc on SunOS or |
| 1403 | Solaris, and you are using GNU as and GNU ld, you may need to add |
| 1404 | -B/bin/ (for SunOS) or -B/usr/ccs/bin/ (for Solaris) to your |
| 1405 | $ccflags, $ldflags, and $lddlflags so that the system's versions of as |
| 1406 | and ld are used. Note that the trailing '/' is required. |
| 1407 | Alternatively, you can use the GCC_EXEC_PREFIX |
| 1408 | environment variable to ensure that Sun's as and ld are used. Consult |
| 1409 | your gcc documentation for further information on the -B option and |
| 1410 | the GCC_EXEC_PREFIX variable. |
| 1411 | |
| 1412 | One convenient way to ensure you are not using GNU as and ld is to |
| 1413 | invoke Configure with |
| 1414 | |
| 1415 | sh Configure -Dcc='gcc -B/usr/ccs/bin/' |
| 1416 | |
| 1417 | for Solaris systems. For a SunOS system, you must use -B/bin/ |
| 1418 | instead. |
| 1419 | |
| 1420 | Alternatively, recent versions of GNU ld reportedly work if you |
| 1421 | include C<-Wl,-export-dynamic> in the ccdlflags variable in |
| 1422 | config.sh. |
| 1423 | |
| 1424 | =item ld.so.1: ./perl: fatal: relocation error: |
| 1425 | |
| 1426 | If you get this message on SunOS or Solaris, and you're using gcc, |
| 1427 | it's probably the GNU as or GNU ld problem in the previous item |
| 1428 | L<"Solaris and SunOS dynamic loading">. |
| 1429 | |
| 1430 | =item LD_LIBRARY_PATH |
| 1431 | |
| 1432 | If you run into dynamic loading problems, check your setting of |
| 1433 | the LD_LIBRARY_PATH environment variable. If you're creating a static |
| 1434 | Perl library (libperl.a rather than libperl.so) it should build |
| 1435 | fine with LD_LIBRARY_PATH unset, though that may depend on details |
| 1436 | of your local set-up. |
| 1437 | |
| 1438 | =item dlopen: stub interception failed |
| 1439 | |
| 1440 | The primary cause of the 'dlopen: stub interception failed' message is |
| 1441 | that the LD_LIBRARY_PATH environment variable includes a directory |
| 1442 | which is a symlink to /usr/lib (such as /lib). |
| 1443 | |
| 1444 | The reason this causes a problem is quite subtle. The file libdl.so.1.0 |
| 1445 | actually *only* contains functions which generate 'stub interception |
| 1446 | failed' errors! The runtime linker intercepts links to |
| 1447 | "/usr/lib/libdl.so.1.0" and links in internal implementation of those |
| 1448 | functions instead. [Thanks to Tim Bunce for this explanation.] |
| 1449 | |
| 1450 | =item nm extraction |
| 1451 | |
| 1452 | If Configure seems to be having trouble finding library functions, |
| 1453 | try not using nm extraction. You can do this from the command line |
| 1454 | with |
| 1455 | |
| 1456 | sh Configure -Uusenm |
| 1457 | |
| 1458 | or by answering the nm extraction question interactively. |
| 1459 | If you have previously run Configure, you should not reuse your old |
| 1460 | config.sh. |
| 1461 | |
| 1462 | =item umask not found |
| 1463 | |
| 1464 | If the build processes encounters errors relating to umask(), the problem |
| 1465 | is probably that Configure couldn't find your umask() system call. |
| 1466 | Check your config.sh. You should have d_umask='define'. If you don't, |
| 1467 | this is probably the L<"nm extraction"> problem discussed above. Also, |
| 1468 | try reading the hints file for your system for further information. |
| 1469 | |
| 1470 | =item vsprintf |
| 1471 | |
| 1472 | If you run into problems with vsprintf in compiling util.c, the |
| 1473 | problem is probably that Configure failed to detect your system's |
| 1474 | version of vsprintf(). Check whether your system has vprintf(). |
| 1475 | (Virtually all modern Unix systems do.) Then, check the variable |
| 1476 | d_vprintf in config.sh. If your system has vprintf, it should be: |
| 1477 | |
| 1478 | d_vprintf='define' |
| 1479 | |
| 1480 | If Configure guessed wrong, it is likely that Configure guessed wrong |
| 1481 | on a number of other common functions too. This is probably |
| 1482 | the L<"nm extraction"> problem discussed above. |
| 1483 | |
| 1484 | =item do_aspawn |
| 1485 | |
| 1486 | If you run into problems relating to do_aspawn or do_spawn, the |
| 1487 | problem is probably that Configure failed to detect your system's |
| 1488 | fork() function. Follow the procedure in the previous item |
| 1489 | on L<"nm extraction">. |
| 1490 | |
| 1491 | =item __inet_* errors |
| 1492 | |
| 1493 | If you receive unresolved symbol errors during Perl build and/or test |
| 1494 | referring to __inet_* symbols, check to see whether BIND 8.1 is |
| 1495 | installed. It installs a /usr/local/include/arpa/inet.h that refers to |
| 1496 | these symbols. Versions of BIND later than 8.1 do not install inet.h |
| 1497 | in that location and avoid the errors. You should probably update to a |
| 1498 | newer version of BIND. If you can't, you can either link with the |
| 1499 | updated resolver library provided with BIND 8.1 or rename |
| 1500 | /usr/local/bin/arpa/inet.h during the Perl build and test process to |
| 1501 | avoid the problem. |
| 1502 | |
| 1503 | =item #error "No DATAMODEL_NATIVE specified" |
| 1504 | |
| 1505 | This is a common error when trying to build perl on Solaris 2.6 with a |
| 1506 | gcc installation from Solaris 2.5 or 2.5.1. The Solaris header files |
| 1507 | changed, so you need to update your gcc installation. You can either |
| 1508 | rerun the fixincludes script from gcc or take the opportunity to |
| 1509 | update your gcc installation. |
| 1510 | |
| 1511 | =item Optimizer |
| 1512 | |
| 1513 | If you can't compile successfully, try turning off your compiler's |
| 1514 | optimizer. Edit config.sh and change the line |
| 1515 | |
| 1516 | optimize='-O' |
| 1517 | |
| 1518 | to |
| 1519 | |
| 1520 | optimize=' ' |
| 1521 | |
| 1522 | then propagate your changes with B<sh Configure -S> and rebuild |
| 1523 | with B<make depend; make>. |
| 1524 | |
| 1525 | =item CRIPPLED_CC |
| 1526 | |
| 1527 | If you still can't compile successfully, try: |
| 1528 | |
| 1529 | sh Configure -Accflags=-DCRIPPLED_CC |
| 1530 | |
| 1531 | This flag simplifies some complicated expressions for compilers that get |
| 1532 | indigestion easily. (Just because you get no errors doesn't mean it |
| 1533 | compiled right!) |
| 1534 | |
| 1535 | =item Missing functions |
| 1536 | |
| 1537 | If you have missing routines, you probably need to add some library or |
| 1538 | other, or you need to undefine some feature that Configure thought was |
| 1539 | there but is defective or incomplete. Look through config.h for |
| 1540 | likely suspects. If Configure guessed wrong on a number of functions, |
| 1541 | you might have the L<"nm extraction"> problem discussed above. |
| 1542 | |
| 1543 | =item toke.c |
| 1544 | |
| 1545 | Some compilers will not compile or optimize the larger files (such as |
| 1546 | toke.c) without some extra switches to use larger jump offsets or |
| 1547 | allocate larger internal tables. You can customize the switches for |
| 1548 | each file in cflags. It's okay to insert rules for specific files into |
| 1549 | makefile since a default rule only takes effect in the absence of a |
| 1550 | specific rule. |
| 1551 | |
| 1552 | =item Missing dbmclose |
| 1553 | |
| 1554 | SCO prior to 3.2.4 may be missing dbmclose(). An upgrade to 3.2.4 |
| 1555 | that includes libdbm.nfs (which includes dbmclose()) may be available. |
| 1556 | |
| 1557 | =item Note (probably harmless): No library found for -lsomething |
| 1558 | |
| 1559 | If you see such a message during the building of an extension, but |
| 1560 | the extension passes its tests anyway (see L<"make test"> below), |
| 1561 | then don't worry about the warning message. The extension |
| 1562 | Makefile.PL goes looking for various libraries needed on various |
| 1563 | systems; few systems will need all the possible libraries listed. |
| 1564 | For example, a system may have -lcposix or -lposix, but it's |
| 1565 | unlikely to have both, so most users will see warnings for the one |
| 1566 | they don't have. The phrase 'probably harmless' is intended to |
| 1567 | reassure you that nothing unusual is happening, and the build |
| 1568 | process is continuing. |
| 1569 | |
| 1570 | On the other hand, if you are building GDBM_File and you get the |
| 1571 | message |
| 1572 | |
| 1573 | Note (probably harmless): No library found for -lgdbm |
| 1574 | |
| 1575 | then it's likely you're going to run into trouble somewhere along |
| 1576 | the line, since it's hard to see how you can use the GDBM_File |
| 1577 | extension without the -lgdbm library. |
| 1578 | |
| 1579 | It is true that, in principle, Configure could have figured all of |
| 1580 | this out, but Configure and the extension building process are not |
| 1581 | quite that tightly coordinated. |
| 1582 | |
| 1583 | =item sh: ar: not found |
| 1584 | |
| 1585 | This is a message from your shell telling you that the command 'ar' |
| 1586 | was not found. You need to check your PATH environment variable to |
| 1587 | make sure that it includes the directory with the 'ar' command. This |
| 1588 | is a common problem on Solaris, where 'ar' is in the /usr/ccs/bin |
| 1589 | directory. |
| 1590 | |
| 1591 | =item db-recno failure on tests 51, 53 and 55 |
| 1592 | |
| 1593 | Old versions of the DB library (including the DB library which comes |
| 1594 | with FreeBSD 2.1) had broken handling of recno databases with modified |
| 1595 | bval settings. Upgrade your DB library or OS. |
| 1596 | |
| 1597 | =item Bad arg length for semctl, is XX, should be ZZZ |
| 1598 | |
| 1599 | If you get this error message from the lib/ipc_sysv test, your System |
| 1600 | V IPC may be broken. The XX typically is 20, and that is what ZZZ |
| 1601 | also should be. Consider upgrading your OS, or reconfiguring your OS |
| 1602 | to include the System V semaphores. |
| 1603 | |
| 1604 | =item lib/ipc_sysv........semget: No space left on device |
| 1605 | |
| 1606 | Either your account or the whole system has run out of semaphores. Or |
| 1607 | both. Either list the semaphores with "ipcs" and remove the unneeded |
| 1608 | ones (which ones these are depends on your system and applications) |
| 1609 | with "ipcrm -s SEMAPHORE_ID_HERE" or configure more semaphores to your |
| 1610 | system. |
| 1611 | |
| 1612 | =item GNU binutils |
| 1613 | |
| 1614 | If you mix GNU binutils (nm, ld, ar) with equivalent vendor-supplied |
| 1615 | tools you may be in for some trouble. For example creating archives |
| 1616 | with an old GNU 'ar' and then using a new current vendor-supplied 'ld' |
| 1617 | may lead into linking problems. Either recompile your GNU binutils |
| 1618 | under your current operating system release, or modify your PATH not |
| 1619 | to include the GNU utils before running Configure, or specify the |
| 1620 | vendor-supplied utilities explicitly to Configure, for example by |
| 1621 | Configure -Dar=/bin/ar. |
| 1622 | |
| 1623 | =item THIS PACKAGE SEEMS TO BE INCOMPLETE |
| 1624 | |
| 1625 | The F<Configure> program has not been able to find all the files which |
| 1626 | make up the complete Perl distribution. You may have a damaged source |
| 1627 | archive file (in which case you may also have seen messages such as |
| 1628 | C<gzip: stdin: unexpected end of file> and C<tar: Unexpected EOF on |
| 1629 | archive file>), or you may have obtained a structurally-sound but |
| 1630 | incomplete archive. In either case, try downloading again from the |
| 1631 | official site named at the start of this document. If you do find |
| 1632 | that any site is carrying a corrupted or incomplete source code |
| 1633 | archive, please report it to the site's maintainer. |
| 1634 | |
| 1635 | This message can also be a symptom of using (say) a GNU tar compiled |
| 1636 | for SunOS4 on Solaris. When you run SunOS4 binaries on Solaris the |
| 1637 | run-time system magically alters pathnames matching m#lib/locale# - so |
| 1638 | when tar tries to create lib/locale.pm a differently-named file gets |
| 1639 | created instead. |
| 1640 | |
| 1641 | You may find the file under its assumed name and be able to rename it |
| 1642 | back. Or use Sun's tar to do the extract. |
| 1643 | |
| 1644 | =item invalid token: ## |
| 1645 | |
| 1646 | You are using a non-ANSI-compliant C compiler. See L<WARNING: This |
| 1647 | version requires a compiler that supports ANSI C>. |
| 1648 | |
| 1649 | =item lib/locale.pm: No such file or directory |
| 1650 | |
| 1651 | See L<THIS PACKAGE SEEMS TO BE INCOMPLETE>. |
| 1652 | |
| 1653 | =item Miscellaneous |
| 1654 | |
| 1655 | Some additional things that have been reported for either perl4 or perl5: |
| 1656 | |
| 1657 | Genix may need to use libc rather than libc_s, or #undef VARARGS. |
| 1658 | |
| 1659 | NCR Tower 32 (OS 2.01.01) may need -W2,-Sl,2000 and #undef MKDIR. |
| 1660 | |
| 1661 | UTS may need one or more of -DCRIPPLED_CC, -K or -g, and undef LSTAT. |
| 1662 | |
| 1663 | FreeBSD can fail the lib/ipc_sysv.t test if SysV IPC has not been |
| 1664 | configured to the kernel. Perl tries to detect this, though, and |
| 1665 | you will get a message telling what to do. |
| 1666 | |
| 1667 | If you get syntax errors on '(', try -DCRIPPLED_CC. |
| 1668 | |
| 1669 | Machines with half-implemented dbm routines will need to #undef I_ODBM |
| 1670 | |
| 1671 | HP-UX 11 Y2K patch "Y2K-1100 B.11.00.B0125 HP-UX Core OS Year 2000 |
| 1672 | Patch Bundle" has been reported to break the io/fs test #18 which |
| 1673 | tests whether utime() can change timestamps. The Y2K patch seems to |
| 1674 | break utime() so that over NFS the timestamps do not get changed |
| 1675 | (on local filesystems utime() still works). |
| 1676 | |
| 1677 | =back |
| 1678 | |
| 1679 | =head1 make test |
| 1680 | |
| 1681 | This will run the regression tests on the perl you just made. If |
| 1682 | 'make test' doesn't say "All tests successful" then something went |
| 1683 | wrong. See the file t/README in the t subdirectory. |
| 1684 | |
| 1685 | Note that you can't run the tests in background if this disables |
| 1686 | opening of /dev/tty. You can use 'make test-notty' in that case but |
| 1687 | a few tty tests will be skipped. |
| 1688 | |
| 1689 | =head2 What if make test doesn't work? |
| 1690 | |
| 1691 | If make test bombs out, just cd to the t directory and run ./TEST |
| 1692 | by hand to see if it makes any difference. If individual tests |
| 1693 | bomb, you can run them by hand, e.g., |
| 1694 | |
| 1695 | ./perl op/groups.t |
| 1696 | |
| 1697 | Another way to get more detailed information about failed tests and |
| 1698 | individual subtests is to cd to the t directory and run |
| 1699 | |
| 1700 | ./perl harness |
| 1701 | |
| 1702 | (this assumes that most basic tests succeed, since harness uses |
| 1703 | complicated constructs). |
| 1704 | |
| 1705 | You should also read the individual tests to see if there are any helpful |
| 1706 | comments that apply to your system. |
| 1707 | |
| 1708 | =over 4 |
| 1709 | |
| 1710 | =item locale |
| 1711 | |
| 1712 | Note: One possible reason for errors is that some external programs |
| 1713 | may be broken due to the combination of your environment and the way |
| 1714 | B<make test> exercises them. For example, this may happen if you have |
| 1715 | one or more of these environment variables set: LC_ALL LC_CTYPE |
| 1716 | LC_COLLATE LANG. In some versions of UNIX, the non-English locales |
| 1717 | are known to cause programs to exhibit mysterious errors. |
| 1718 | |
| 1719 | If you have any of the above environment variables set, please try |
| 1720 | |
| 1721 | setenv LC_ALL C |
| 1722 | |
| 1723 | (for C shell) or |
| 1724 | |
| 1725 | LC_ALL=C;export LC_ALL |
| 1726 | |
| 1727 | for Bourne or Korn shell) from the command line and then retry |
| 1728 | make test. If the tests then succeed, you may have a broken program that |
| 1729 | is confusing the testing. Please run the troublesome test by hand as |
| 1730 | shown above and see whether you can locate the program. Look for |
| 1731 | things like: exec, `backquoted command`, system, open("|...") or |
| 1732 | open("...|"). All these mean that Perl is trying to run some |
| 1733 | external program. |
| 1734 | |
| 1735 | =item Out of memory |
| 1736 | |
| 1737 | On some systems, particularly those with smaller amounts of RAM, some |
| 1738 | of the tests in t/op/pat.t may fail with an "Out of memory" message. |
| 1739 | For example, on my SparcStation IPC with 12 MB of RAM, in perl5.5.670, |
| 1740 | test 85 will fail if run under either t/TEST or t/harness. |
| 1741 | |
| 1742 | Try stopping other jobs on the system and then running the test by itself: |
| 1743 | |
| 1744 | cd t; ./perl op/pat.t |
| 1745 | |
| 1746 | to see if you have any better luck. If your perl still fails this |
| 1747 | test, it does not necessarily mean you have a broken perl. This test |
| 1748 | tries to exercise the regular expression subsystem quite thoroughly, |
| 1749 | and may well be far more demanding than your normal usage. |
| 1750 | |
| 1751 | =item Test failures from lib/ftmp-security saying "system possibly insecure" |
| 1752 | |
| 1753 | Firstly, test failures from the ftmp-security are not necessarily |
| 1754 | serious or indicative of a real security threat. That being said, |
| 1755 | they bear investigating. |
| 1756 | |
| 1757 | The tests may fail for the following reasons. Note that each of the |
| 1758 | tests is run both in the building directory and the temporary |
| 1759 | directory, as returned by File::Spec->tmpdir(). |
| 1760 | |
| 1761 | (1) If the directory the tests are being run is owned by somebody else |
| 1762 | than the user running the tests, or root (uid 0). This failure can |
| 1763 | happen if the Perl source code distribution is unpacked in a way that |
| 1764 | the user ids in the distribution package are used as-is. Some tar |
| 1765 | programs do this. |
| 1766 | |
| 1767 | (2) If the directory the test are being run in is writable by group |
| 1768 | or by other (remember: with UNIX/POSIX semantics, write access to |
| 1769 | a directory means the right to add/remove files in that directory), |
| 1770 | and there is no sticky bit set in the directory. 'Sticky bit' is |
| 1771 | a feature used in some UNIXes to give extra protection to files: if |
| 1772 | the bit is on a directory, no one but the owner (or the root) can remove |
| 1773 | that file even if the permissions of the directory would allow file |
| 1774 | removal by others. This failure can happen if the permissions in the |
| 1775 | directory simply are a bit too liberal for the tests' liking. This |
| 1776 | may or may not be a real problem: it depends on the permissions policy |
| 1777 | used on this particular directory/project/system/site. This failure |
| 1778 | can also happen if the system either doesn't support the sticky bit |
| 1779 | (this is the case with many non-UNIX platforms: in principle the |
| 1780 | File::Temp should know about these platforms and skip the tests), or |
| 1781 | if the system supports the sticky bit but for some reason or reasons |
| 1782 | it is not being used. This is for example the case with HP-UX: as of |
| 1783 | HP-UX release 11.00, the sticky bit is very much supported, but HP-UX |
| 1784 | doesn't use it on its /tmp directory as shipped. Also as with the |
| 1785 | permissions, some local policy might dictate that the stickiness is |
| 1786 | not used. |
| 1787 | |
| 1788 | (3) If the system supports the POSIX 'chown giveaway' feature and if |
| 1789 | any of the parent directories of the temporary file back to the root |
| 1790 | directory are 'unsafe', using the definitions given above in (1) and |
| 1791 | (2). |
| 1792 | |
| 1793 | See the documentation for the File::Temp module for more information |
| 1794 | about the various security aspects. |
| 1795 | |
| 1796 | =back |
| 1797 | |
| 1798 | =head1 make install |
| 1799 | |
| 1800 | This will put perl into the public directory you specified to |
| 1801 | Configure; by default this is /usr/local/bin. It will also try |
| 1802 | to put the man pages in a reasonable place. It will not nroff the man |
| 1803 | pages, however. You may need to be root to run B<make install>. If you |
| 1804 | are not root, you must own the directories in question and you should |
| 1805 | ignore any messages about chown not working. |
| 1806 | |
| 1807 | =head2 Installing perl under different names |
| 1808 | |
| 1809 | If you want to install perl under a name other than "perl" (for example, |
| 1810 | when installing perl with special features enabled, such as debugging), |
| 1811 | indicate the alternate name on the "make install" line, such as: |
| 1812 | |
| 1813 | make install PERLNAME=myperl |
| 1814 | |
| 1815 | You can separately change the base used for versioned names (like |
| 1816 | "perl5.005") by setting PERLNAME_VERBASE, like |
| 1817 | |
| 1818 | make install PERLNAME=perl5 PERLNAME_VERBASE=perl |
| 1819 | |
| 1820 | This can be useful if you have to install perl as "perl5" (due to an |
| 1821 | ancient version in /usr/bin supplied by your vendor, eg). Without this |
| 1822 | the versioned binary would be called "perl55.005". |
| 1823 | |
| 1824 | =head2 Installed files |
| 1825 | |
| 1826 | If you want to see exactly what will happen without installing |
| 1827 | anything, you can run |
| 1828 | |
| 1829 | ./perl installperl -n |
| 1830 | ./perl installman -n |
| 1831 | |
| 1832 | make install will install the following: |
| 1833 | |
| 1834 | binaries |
| 1835 | |
| 1836 | perl, |
| 1837 | perl5.nnn where nnn is the current release number. This |
| 1838 | will be a link to perl. |
| 1839 | suidperl, |
| 1840 | sperl5.nnn If you requested setuid emulation. |
| 1841 | a2p awk-to-perl translator |
| 1842 | |
| 1843 | scripts |
| 1844 | |
| 1845 | cppstdin This is used by perl -P, if your cc -E can't |
| 1846 | read from stdin. |
| 1847 | c2ph, pstruct Scripts for handling C structures in header files. |
| 1848 | s2p sed-to-perl translator |
| 1849 | find2perl find-to-perl translator |
| 1850 | h2ph Extract constants and simple macros from C headers |
| 1851 | h2xs Converts C .h header files to Perl extensions. |
| 1852 | perlbug Tool to report bugs in Perl. |
| 1853 | perldoc Tool to read perl's pod documentation. |
| 1854 | pl2pm Convert Perl 4 .pl files to Perl 5 .pm modules |
| 1855 | pod2html, Converters from perl's pod documentation format |
| 1856 | pod2latex, to other useful formats. |
| 1857 | pod2man, |
| 1858 | pod2text, |
| 1859 | pod2checker, |
| 1860 | pod2select, |
| 1861 | pod2usage |
| 1862 | splain Describe Perl warnings and errors |
| 1863 | dprofpp Perl code profile post-processor |
| 1864 | |
| 1865 | library files |
| 1866 | |
| 1867 | in $privlib and $archlib specified to |
| 1868 | Configure, usually under /usr/local/lib/perl5/. |
| 1869 | |
| 1870 | documentation |
| 1871 | |
| 1872 | man pages in $man1dir, usually /usr/local/man/man1. |
| 1873 | module man |
| 1874 | pages in $man3dir, usually /usr/local/man/man3. |
| 1875 | pod/*.pod in $privlib/pod/. |
| 1876 | |
| 1877 | Installperl will also create the directories listed above |
| 1878 | in L<"Installation Directories">. |
| 1879 | |
| 1880 | Perl's *.h header files and the libperl library are also installed |
| 1881 | under $archlib so that any user may later build new modules, run the |
| 1882 | optional Perl compiler, or embed the perl interpreter into another |
| 1883 | program even if the Perl source is no longer available. |
| 1884 | |
| 1885 | Sometimes you only want to install the version-specific parts of the perl |
| 1886 | installation. For example, you may wish to install a newer version of |
| 1887 | perl alongside an already installed production version of perl without |
| 1888 | disabling installation of new modules for the production version. |
| 1889 | To only install the version-specific parts of the perl installation, run |
| 1890 | |
| 1891 | Configure -Dversiononly |
| 1892 | |
| 1893 | or answer 'y' to the appropriate Configure prompt. Alternatively, |
| 1894 | you can just manually run |
| 1895 | |
| 1896 | ./perl installperl -v |
| 1897 | |
| 1898 | and skip installman altogether. |
| 1899 | See also L<"Maintaining completely separate versions"> for another |
| 1900 | approach. |
| 1901 | |
| 1902 | =head1 Coexistence with earlier versions of perl5 |
| 1903 | |
| 1904 | In general, you can usually safely upgrade from one version of Perl (e.g. |
| 1905 | 5.004_04) to another similar version (e.g. 5.004_05) without re-compiling |
| 1906 | all of your add-on extensions. You can also safely leave the old version |
| 1907 | around in case the new version causes you problems for some reason. |
| 1908 | For example, if you want to be sure that your script continues to run |
| 1909 | with 5.004_04, simply replace the '#!/usr/local/bin/perl' line at the |
| 1910 | top of the script with the particular version you want to run, e.g. |
| 1911 | #!/usr/local/bin/perl5.00404. |
| 1912 | |
| 1913 | Most extensions will probably not need to be recompiled to use |
| 1914 | with a newer version of perl. Here is how it is supposed to work. |
| 1915 | (These examples assume you accept all the Configure defaults.) |
| 1916 | |
| 1917 | Suppose you already have version 5.005_03 installed. The directories |
| 1918 | searched by 5.005_03 are |
| 1919 | |
| 1920 | /usr/local/lib/perl5/5.00503/$archname |
| 1921 | /usr/local/lib/perl5/5.00503 |
| 1922 | /usr/local/lib/perl5/site_perl/5.005/$archname |
| 1923 | /usr/local/lib/perl5/site_perl/5.005 |
| 1924 | |
| 1925 | Beginning with 5.6.0 the version number in the site libraries are |
| 1926 | fully versioned. Now, suppose you install version 5.6.0. The directories |
| 1927 | searched by version 5.6.0 will be |
| 1928 | |
| 1929 | /usr/local/lib/perl5/5.6.0/$archname |
| 1930 | /usr/local/lib/perl5/5.6.0 |
| 1931 | /usr/local/lib/perl5/site_perl/5.6.0/$archname |
| 1932 | /usr/local/lib/perl5/site_perl/5.6.0 |
| 1933 | |
| 1934 | /usr/local/lib/perl5/site_perl/5.005/$archname |
| 1935 | /usr/local/lib/perl5/site_perl/5.005 |
| 1936 | /usr/local/lib/perl5/site_perl/ |
| 1937 | |
| 1938 | Notice the last three entries -- Perl understands the default structure |
| 1939 | of the $sitelib directories and will look back in older, compatible |
| 1940 | directories. This way, modules installed under 5.005_03 will continue |
| 1941 | to be usable by 5.005_03 but will also accessible to 5.6.0. Further, |
| 1942 | suppose that you upgrade a module to one which requires features |
| 1943 | present only in 5.6.0. That new module will get installed into |
| 1944 | /usr/local/lib/perl5/site_perl/5.6.0 and will be available to 5.6.0, |
| 1945 | but will not interfere with the 5.005_03 version. |
| 1946 | |
| 1947 | The last entry, /usr/local/lib/perl5/site_perl/, is there so that |
| 1948 | 5.6.0 will look for 5.004-era pure perl modules. |
| 1949 | |
| 1950 | Lastly, suppose you now install version 5.6.1, which we'll assume is |
| 1951 | binary compatible with 5.6.0 and 5.005. The directories searched |
| 1952 | by 5.6.1 (if you don't change the Configure defaults) will be: |
| 1953 | |
| 1954 | /usr/local/lib/perl5/5.6.1/$archname |
| 1955 | /usr/local/lib/perl5/5.6.1 |
| 1956 | /usr/local/lib/perl5/site_perl/5.6.1/$archname |
| 1957 | /usr/local/lib/perl5/site_perl/5.6.1 |
| 1958 | |
| 1959 | /usr/local/lib/perl5/site_perl/5.6.0/$archname |
| 1960 | /usr/local/lib/perl5/site_perl/5.6.0 |
| 1961 | |
| 1962 | /usr/local/lib/perl5/site_perl/5.005/$archname |
| 1963 | /usr/local/lib/perl5/site_perl/5.005 |
| 1964 | /usr/local/lib/perl5/site_perl/ |
| 1965 | |
| 1966 | Assuming the users in your site are still actively using perl 5.6.0 and |
| 1967 | 5.005 after you installed 5.6.1, you can continue to install add-on |
| 1968 | extensions using any of perl 5.6.1, 5.6.0, or 5.005. The installations |
| 1969 | of these different versions remain distinct, but remember that the newer |
| 1970 | versions of perl are automatically set up to search the site libraries of |
| 1971 | the older ones. This means that installing a new extension with 5.005 |
| 1972 | will make it visible to all three versions. Later, if you install the |
| 1973 | same extension using, say, perl 5.6.1, it will override the 5.005-installed |
| 1974 | version, but only for perl 5.6.1. |
| 1975 | |
| 1976 | This way, you can choose to share compatible extensions, but also upgrade |
| 1977 | to a newer version of an extension that may be incompatible with earlier |
| 1978 | versions, without breaking the earlier versions' installations. |
| 1979 | |
| 1980 | =head2 Maintaining completely separate versions |
| 1981 | |
| 1982 | Many users prefer to keep all versions of perl in completely |
| 1983 | separate directories. This guarantees that an update to one version |
| 1984 | won't interfere with another version. (The defaults guarantee this for |
| 1985 | libraries after 5.6.0, but not for executables. TODO?) One convenient |
| 1986 | way to do this is by using a separate prefix for each version, such as |
| 1987 | |
| 1988 | sh Configure -Dprefix=/opt/perl5.004 |
| 1989 | |
| 1990 | and adding /opt/perl5.004/bin to the shell PATH variable. Such users |
| 1991 | may also wish to add a symbolic link /usr/local/bin/perl so that |
| 1992 | scripts can still start with #!/usr/local/bin/perl. |
| 1993 | |
| 1994 | Others might share a common directory for maintenance sub-versions |
| 1995 | (e.g. 5.004 for all 5.004_0x versions), but change directory with |
| 1996 | each major version. |
| 1997 | |
| 1998 | If you are installing a development subversion, you probably ought to |
| 1999 | seriously consider using a separate directory, since development |
| 2000 | subversions may not have all the compatibility wrinkles ironed out |
| 2001 | yet. |
| 2002 | |
| 2003 | =head2 Upgrading from 5.005 to 5.6.0 |
| 2004 | |
| 2005 | Most extensions built and installed with versions of perl |
| 2006 | prior to 5.005_50 will not need to be recompiled to be used with |
| 2007 | 5.6.0. If you find you do need to rebuild an extension with 5.6.0, |
| 2008 | you may safely do so without disturbing the 5.005 installation. |
| 2009 | (See L<"Coexistence with earlier versions of perl5"> above.) |
| 2010 | |
| 2011 | See your installed copy of the perllocal.pod file for a (possibly |
| 2012 | incomplete) list of locally installed modules. Note that you want |
| 2013 | perllocal.pod not perllocale.pod for installed module information. |
| 2014 | |
| 2015 | =head1 Coexistence with perl4 |
| 2016 | |
| 2017 | You can safely install perl5 even if you want to keep perl4 around. |
| 2018 | |
| 2019 | By default, the perl5 libraries go into /usr/local/lib/perl5/, so |
| 2020 | they don't override the perl4 libraries in /usr/local/lib/perl/. |
| 2021 | |
| 2022 | In your /usr/local/bin directory, you should have a binary named |
| 2023 | perl4.036. That will not be touched by the perl5 installation |
| 2024 | process. Most perl4 scripts should run just fine under perl5. |
| 2025 | However, if you have any scripts that require perl4, you can replace |
| 2026 | the #! line at the top of them by #!/usr/local/bin/perl4.036 (or |
| 2027 | whatever the appropriate pathname is). See pod/perltrap.pod for |
| 2028 | possible problems running perl4 scripts under perl5. |
| 2029 | |
| 2030 | =head1 cd /usr/include; h2ph *.h sys/*.h |
| 2031 | |
| 2032 | Some perl scripts need to be able to obtain information from the |
| 2033 | system header files. This command will convert the most commonly used |
| 2034 | header files in /usr/include into files that can be easily interpreted |
| 2035 | by perl. These files will be placed in the architecture-dependent |
| 2036 | library ($archlib) directory you specified to Configure. |
| 2037 | |
| 2038 | Note: Due to differences in the C and perl languages, the conversion |
| 2039 | of the header files is not perfect. You will probably have to |
| 2040 | hand-edit some of the converted files to get them to parse correctly. |
| 2041 | For example, h2ph breaks spectacularly on type casting and certain |
| 2042 | structures. |
| 2043 | |
| 2044 | =head1 installhtml --help |
| 2045 | |
| 2046 | Some sites may wish to make perl documentation available in HTML |
| 2047 | format. The installhtml utility can be used to convert pod |
| 2048 | documentation into linked HTML files and install them. |
| 2049 | |
| 2050 | Currently, the supplied ./installhtml script does not make use of the |
| 2051 | html Configure variables. This should be fixed in a future release. |
| 2052 | |
| 2053 | The following command-line is an example of one used to convert |
| 2054 | perl documentation: |
| 2055 | |
| 2056 | ./installhtml \ |
| 2057 | --podroot=. \ |
| 2058 | --podpath=lib:ext:pod:vms \ |
| 2059 | --recurse \ |
| 2060 | --htmldir=/perl/nmanual \ |
| 2061 | --htmlroot=/perl/nmanual \ |
| 2062 | --splithead=pod/perlipc \ |
| 2063 | --splititem=pod/perlfunc \ |
| 2064 | --libpods=perlfunc:perlguts:perlvar:perlrun:perlop \ |
| 2065 | --verbose |
| 2066 | |
| 2067 | See the documentation in installhtml for more details. It can take |
| 2068 | many minutes to execute a large installation and you should expect to |
| 2069 | see warnings like "no title", "unexpected directive" and "cannot |
| 2070 | resolve" as the files are processed. We are aware of these problems |
| 2071 | (and would welcome patches for them). |
| 2072 | |
| 2073 | You may find it helpful to run installhtml twice. That should reduce |
| 2074 | the number of "cannot resolve" warnings. |
| 2075 | |
| 2076 | =head1 cd pod && make tex && (process the latex files) |
| 2077 | |
| 2078 | Some sites may also wish to make the documentation in the pod/ directory |
| 2079 | available in TeX format. Type |
| 2080 | |
| 2081 | (cd pod && make tex && <process the latex files>) |
| 2082 | |
| 2083 | =head1 Reporting Problems |
| 2084 | |
| 2085 | If you have difficulty building perl, and none of the advice in this file |
| 2086 | helps, and careful reading of the error message and the relevant manual |
| 2087 | pages on your system doesn't help either, then you should send a message |
| 2088 | to either the comp.lang.perl.misc newsgroup or to perlbug@perl.org with |
| 2089 | an accurate description of your problem. |
| 2090 | |
| 2091 | Please include the output of the ./myconfig shell script that comes with |
| 2092 | the distribution. Alternatively, you can use the perlbug program that |
| 2093 | comes with the perl distribution, but you need to have perl compiled |
| 2094 | before you can use it. (If you have not installed it yet, you need to |
| 2095 | run C<./perl -Ilib utils/perlbug> instead of a plain C<perlbug>.) |
| 2096 | |
| 2097 | Please try to make your message brief but clear. Trim out unnecessary |
| 2098 | information. Do not include large files (such as config.sh or a complete |
| 2099 | Configure or make log) unless absolutely necessary. Do not include a |
| 2100 | complete transcript of your build session. Just include the failing |
| 2101 | commands, the relevant error messages, and whatever preceding commands |
| 2102 | are necessary to give the appropriate context. Plain text should |
| 2103 | usually be sufficient--fancy attachments or encodings may actually |
| 2104 | reduce the number of people who read your message. Your message |
| 2105 | will get relayed to over 400 subscribers around the world so please |
| 2106 | try to keep it brief but clear. |
| 2107 | |
| 2108 | =head1 DOCUMENTATION |
| 2109 | |
| 2110 | Read the manual entries before running perl. The main documentation |
| 2111 | is in the pod/ subdirectory and should have been installed during the |
| 2112 | build process. Type B<man perl> to get started. Alternatively, you |
| 2113 | can type B<perldoc perl> to use the supplied perldoc script. This is |
| 2114 | sometimes useful for finding things in the library modules. |
| 2115 | |
| 2116 | Under UNIX, you can produce a documentation book in postscript form, |
| 2117 | along with its table of contents, by going to the pod/ subdirectory and |
| 2118 | running (either): |
| 2119 | |
| 2120 | ./roffitall -groff # If you have GNU groff installed |
| 2121 | ./roffitall -psroff # If you have psroff |
| 2122 | |
| 2123 | This will leave you with two postscript files ready to be printed. |
| 2124 | (You may need to fix the roffitall command to use your local troff |
| 2125 | set-up.) |
| 2126 | |
| 2127 | Note that you must have performed the installation already before running |
| 2128 | the above, since the script collects the installed files to generate |
| 2129 | the documentation. |
| 2130 | |
| 2131 | =head1 AUTHOR |
| 2132 | |
| 2133 | Original author: Andy Dougherty doughera@lafayette.edu , borrowing very |
| 2134 | heavily from the original README by Larry Wall, with lots of helpful |
| 2135 | feedback and additions from the perl5-porters@perl.org folks. |
| 2136 | |
| 2137 | If you have problems, corrections, or questions, please see |
| 2138 | L<"Reporting Problems"> above. |
| 2139 | |
| 2140 | =head1 REDISTRIBUTION |
| 2141 | |
| 2142 | This document is part of the Perl package and may be distributed under |
| 2143 | the same terms as perl itself, with the following additional request: |
| 2144 | If you are distributing a modified version of perl (perhaps as part of |
| 2145 | a larger package) please B<do> modify these installation instructions |
| 2146 | and the contact information to match your distribution. |
| 2147 | |
| 2148 | =head1 LAST MODIFIED |
| 2149 | |
| 2150 | $Id: INSTALL,v 1.58 1999/07/23 14:43:00 doughera Exp $ |