Regexp bug in the docs, spotted by Enache's eagle eyes.
[p5sagit/p5-mst-13.2.git] / README.cygwin
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8736538c 1If you read this file _as_is_, just ignore the funny characters you
2see. It is written in the POD format (see pod/perlpod.pod) which is
3specially designed to be readable as is.
5aabfad6 4
8736538c 5=head1 NAME
5aabfad6 6
f8dbba82 7README.cygwin - Perl for Cygwin
5aabfad6 8
8736538c 9=head1 SYNOPSIS
5aabfad6 10
f8dbba82 11This document will help you configure, make, test and install Perl
12on Cygwin. This document also describes features of Cygwin that will
13affect how Perl behaves at runtime.
5aabfad6 14
f8dbba82 15B<NOTE:> There are pre-built Perl packages available for Cygwin and a
37a78d01 16version of Perl is provided in the normal Cygwin install. If you do
17not need to customize the configuration, consider using one of those
18packages.
5aabfad6 19
5aabfad6 20
a83b6f46 21=head1 PREREQUISITES FOR COMPILING PERL ON CYGWIN
8736538c 22
f8dbba82 23=head2 Cygwin = GNU+Cygnus+Windows (Don't leave UNIX without it)
8736538c 24
f8dbba82 25The Cygwin tools are ports of the popular GNU development tools for Win32
26platforms. They run thanks to the Cygwin library which provides the UNIX
27system calls and environment these programs expect. More information
28about this project can be found at:
8736538c 29
47dafe4d 30 http://www.cygwin.com/
1cab015a 31
f8dbba82 32A recent net or commercial release of Cygwin is required.
8736538c 33
538204d5 34At the time this document was last updated, Cygwin 1.3.22 was current.
8736538c 35
1cab015a 36
f8dbba82 37=head2 Cygwin Configuration
1cab015a 38
f8dbba82 39While building Perl some changes may be necessary to your Cygwin setup so
40that Perl builds cleanly. These changes are B<not> required for normal
41Perl usage.
1cab015a 42
f8dbba82 43B<NOTE:> The binaries that are built will run on all Win32 versions.
125a13ce 44They do not depend on your host system (Win9x/WinME, WinNT/Win2K)
45or your Cygwin configuration (I<ntea>, I<ntsec>, binary/text mounts).
46The only dependencies come from hard-coded pathnames like C</usr/local>.
47However, your host system and Cygwin configuration will affect Perl's
48runtime behavior (see L</"TEST">).
1cab015a 49
f8dbba82 50=over 4
1cab015a 51
f8dbba82 52=item * C<PATH>
1cab015a 53
f8dbba82 54Set the C<PATH> environment variable so that Configure finds the Cygwin
55versions of programs. Any Windows directories should be removed or
56moved to the end of your C<PATH>.
1cab015a 57
f8dbba82 58=item * I<nroff>
1cab015a 59
f8dbba82 60If you do not have I<nroff> (which is part of the I<groff> package),
b4bcd662 61Configure will B<not> prompt you to install I<man> pages.
f8dbba82 62
63=item * Permissions
64
65On WinNT with either the I<ntea> or I<ntsec> C<CYGWIN> settings, directory
66and file permissions may not be set correctly. Since the build process
125a13ce 67creates directories and files, to be safe you may want to run a `C<chmod
f8dbba82 68-R +w *>' on the entire Perl source tree.
69
70Also, it is a well known WinNT "feature" that files created by a login
71that is a member of the I<Administrators> group will be owned by the
72I<Administrators> group. Depending on your umask, you may find that you
73can not write to files that you just created (because you are no longer
74the owner). When using the I<ntsec> C<CYGWIN> setting, this is not an
75issue because it "corrects" the ownership to what you would expect on
76a UNIX system.
1cab015a 77
8736538c 78=back
79
a83b6f46 80=head1 CONFIGURE PERL ON CYGWIN
8736538c 81
f8dbba82 82The default options gathered by Configure with the assistance of
83F<hints/cygwin.sh> will build a Perl that supports dynamic loading
84(which requires a shared F<libperl.dll>).
f89d6eaa 85
f8dbba82 86This will run Configure and keep a record:
8736538c 87
f8dbba82 88 ./Configure 2>&1 | tee log.configure
8736538c 89
b4bcd662 90If you are willing to accept all the defaults run Configure with B<-de>.
f8dbba82 91However, several useful customizations are available.
5aabfad6 92
a83b6f46 93=head2 Stripping Perl Binaries on Cygwin
5aabfad6 94
f8dbba82 95It is possible to strip the EXEs and DLLs created by the build process.
96The resulting binaries will be significantly smaller. If you want the
97binaries to be stripped, you can either add a B<-s> option when Configure
98prompts you,
8736538c 99
f8dbba82 100 Any additional ld flags (NOT including libraries)? [none] -s
5db16f6a 101 Any special flags to pass to gcc to use dynamic linking? [none] -s
f8dbba82 102 Any special flags to pass to ld2 to create a dynamically loaded library?
103 [none] -s
8736538c 104
f8dbba82 105or you can edit F<hints/cygwin.sh> and uncomment the relevant variables
106near the end of the file.
8736538c 107
a83b6f46 108=head2 Optional Libraries for Perl on Cygwin
8736538c 109
f8dbba82 110Several Perl functions and modules depend on the existence of
111some optional libraries. Configure will find them if they are
112installed in one of the directories listed as being used for library
37a78d01 113searches. Pre-built packages for most of these are available from
114the Cygwin installer.
8736538c 115
f8dbba82 116=over 4
8736538c 117
f8dbba82 118=item * C<-lcrypt>
8736538c 119
125a13ce 120The crypt package distributed with Cygwin is a Linux compatible 56-bit
121DES crypt port by Corinna Vinschen.
122
123Alternatively, the crypt libraries in GNU libc have been ported to Cygwin.
1cab015a 124
5db16f6a 125The DES based Ultra Fast Crypt port was done by Alexey Truhan:
1cab015a 126
2ca463cb 127 ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/porters/Okhapkin_Sergey/cw32crypt-dist-0.tgz
f8dbba82 128
129NOTE: There are various export restrictions on DES implementations,
130see the glibc README for more details.
1cab015a 131
f8dbba82 132The MD5 port was done by Andy Piper:
1cab015a 133
2ca463cb 134 ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/porters/Okhapkin_Sergey/libcrypt.tgz
1cab015a 135
f8dbba82 136=item * C<-lgdbm> (C<use GDBM_File>)
1cab015a 137
a0457be1 138GDBM is available for Cygwin.
125a13ce 139
f8dbba82 140=item * C<-ldb> (C<use DB_File>)
1cab015a 141
f8dbba82 142BerkeleyDB is available for Cygwin. Some details can be found in
143F<ext/DB_File/DB_File.pm>.
1cab015a 144
125a13ce 145NOTE: The BerkeleyDB library only completely works on NTFS partitions.
146
f8dbba82 147=item * C<-lcygipc> (C<use IPC::SysV>)
148
6b49d266 149A port of SysV IPC is available for Cygwin.
150
151NOTE: This has B<not> been extensively tested. In particular,
b4bcd662 152C<d_semctl_semun> is undefined because it fails a Configure test
153and on Win9x the I<shm*()> functions seem to hang. It also creates
154a compile time dependency because F<perl.h> includes F<<sys/ipc.h>>
155and F<<sys/sem.h>> (which will be required in the future when compiling
47f4f673 156CPAN modules). NO LONGER SUPPORTED!
157
158=item * C<-lutil>
159
160Included with the standard Cygwin netrelease is the inetutils package
161which includes libutil.a.
1cab015a 162
163=back
164
a83b6f46 165=head2 Configure-time Options for Perl on Cygwin
f8dbba82 166
0a110db2 167The F<INSTALL> document describes several Configure-time options. Some of
168these will work with Cygwin, others are not yet possible. Also, some of
169these are experimental. You can either select an option when Configure
170prompts you or you can define (undefine) symbols on the command line.
f8dbba82 171
172=over 4
173
174=item * C<-Uusedl>
175
0a110db2 176Undefining this symbol forces Perl to be compiled statically.
f8dbba82 177
178=item * C<-Uusemymalloc>
1cab015a 179
538204d5 180By default Perl uses the C<malloc()> included with the Perl source. If you
181want to force Perl to build with the system C<malloc()> undefine this symbol.
1cab015a 182
33bf3ba1 183=item * C<-Uuseperlio>
184
bbebedce 185Undefining this symbol disables the PerlIO abstraction. PerlIO is now the
186default; it is not recommended to disable PerlIO.
33bf3ba1 187
6b49d266 188=item * C<-Dusemultiplicity>
1cab015a 189
f8dbba82 190Multiplicity is required when embedding Perl in a C program and using
191more than one interpreter instance. This works with the Cygwin port.
1cab015a 192
0a110db2 193=item * C<-Duse64bitint>
1cab015a 194
407b02b1 195By default Perl uses 32 bit integers. If you want to use larger 64
196bit integers, define this symbol. If there is trouble, check that
197your Cygwin installation is up to date.
1cab015a 198
f8dbba82 199=item * C<-Duselongdouble>
1cab015a 200
f8dbba82 201I<gcc> supports long doubles (12 bytes). However, several additional
202long double math functions are necessary to use them within Perl
5cb3728c 203(I<{atan2, cos, exp, floor, fmod, frexp, isnan, log, modf, pow, sin, sqrt}l,
204strtold>).
f8dbba82 205These are B<not> yet available with Cygwin.
1cab015a 206
f8dbba82 207=item * C<-Dusethreads>
1cab015a 208
27008580 209POSIX threads are implemented in Cygwin, define this symbol if you want
210a threaded perl. If there is trouble, check that your Cygwin installation
211is up to date.
f8dbba82 212
213=item * C<-Duselargefiles>
214
0a110db2 215Although Win32 supports large files, Cygwin currently uses 32-bit integers
5db16f6a 216for internal size and position calculations.
1cab015a 217
a0457be1 218=item * C<-Dmksymlinks>
219
220Use this to build perl outside of the source tree. This works with Cygwin.
538204d5 221Details can be found in the F<INSTALL> document. This is the recommended
bbebedce 222way to build perl from sources.
a0457be1 223
1cab015a 224=back
225
a83b6f46 226=head2 Suspicious Warnings on Cygwin
1cab015a 227
f8dbba82 228You may see some messages during Configure that seem suspicious.
8736538c 229
f8dbba82 230=over 4
8736538c 231
b4bcd662 232=item * I<dlsym()>
0a110db2 233
234I<ld2> is needed to build dynamic libraries, but it does not exist
538204d5 235when C<dlsym()> checking occurs (it is not created until `C<make>' runs).
0a110db2 236You will see the following message:
237
538204d5 238 Checking whether your C<dlsym()> needs a leading underscore ...
b4bcd662 239 ld2: not found
0a110db2 240 I can't compile and run the test program.
241 I'm guessing that dlsym doesn't need a leading underscore.
242
243Since the guess is correct, this is not a problem.
244
b4bcd662 245=item * Win9x and C<d_eofnblk>
5db16f6a 246
247Win9x does not correctly report C<EOF> with a non-blocking read on a
248closed pipe. You will see the following messages:
249
250 But it also returns -1 to signal EOF, so be careful!
251 WARNING: you can't distinguish between EOF and no data!
252
253 *** WHOA THERE!!! ***
254 The recommended value for $d_eofnblk on this machine was "define"!
255 Keep the recommended value? [y]
256
257At least for consistency with WinNT, you should keep the recommended
258value.
259
0a110db2 260=item * Compiler/Preprocessor defines
261
262The following error occurs because of the Cygwin C<#define> of
263C<_LONG_DOUBLE>:
264
265 Guessing which symbols your C compiler and preprocessor define...
fb652349 266 try.c:<line#>: missing binary operator
0a110db2 267
fb652349 268This failure does not seem to cause any problems. With older gcc
269versions, "parse error" is reported instead of "missing binary
270operator".
0a110db2 271
5db16f6a 272=back
273
a83b6f46 274=head1 MAKE ON CYGWIN
5aabfad6 275
b4bcd662 276Simply run I<make> and wait:
f8dbba82 277
278 make 2>&1 | tee log.make
279
a83b6f46 280=head2 Warnings on Cygwin
f8dbba82 281
282Warnings like these are normal:
283
fb652349 284 perl.c: In function `S_parse_body':
285 perl.c:1468: warning: implicit declaration of function `init_os_extras'
286 ...
287 pp_sys.c:289: warning: `S_emulate_eaccess' defined but not used
288 ...
289 perlio.c: In function `perlsio_binmode':
290 perlio.c:98: warning: implicit declaration of function `setmode'
291 perlio.c:98: warning: passing arg 1 of `Perl_PerlIO_fileno' from incompatible pointer type
292 ...
293 make: [extra.pods] Error 1 (ignored)
294 ...
295 make: [extras.make] Error 1 (ignored)
f8dbba82 296
a83b6f46 297=head2 ld2 on Cygwin
f8dbba82 298
299During `C<make>', I<ld2> will be created and installed in your $installbin
300directory (where you said to put public executables). It does not
301wait until the `C<make install>' process to install the I<ld2> script,
302this is because the remainder of the `C<make>' refers to I<ld2> without
303fully specifying its path and does this from multiple subdirectories.
304The assumption is that $installbin is in your current C<PATH>. If this
b4bcd662 305is not the case `C<make>' will fail at some point. If this happens,
306just manually copy I<ld2> from the source directory to somewhere in
307your C<PATH>.
f8dbba82 308
a83b6f46 309=head1 TEST ON CYGWIN
f8dbba82 310
311There are two steps to running the test suite:
312
313 make test 2>&1 | tee log.make-test
314
315 cd t;./perl harness 2>&1 | tee ../log.harness
316
317The same tests are run both times, but more information is provided when
318running as `C<./perl harness>'.
5aabfad6 319
f8dbba82 320Test results vary depending on your host system and your Cygwin
b4bcd662 321configuration. If a test can pass in some Cygwin setup, it is always
322attempted and explainable test failures are documented. It is possible
125a13ce 323for Perl to pass all the tests, but it is more likely that some tests
324will fail for one of the reasons listed below.
1cab015a 325
a83b6f46 326=head2 File Permissions on Cygwin
1cab015a 327
f8dbba82 328UNIX file permissions are based on sets of mode bits for
b4bcd662 329{read,write,execute} for each {user,group,other}. By default Cygwin
330only tracks the Win32 read-only attribute represented as the UNIX file
331user write bit (files are always readable, files are executable if they
332have a F<.{com,bat,exe}> extension or begin with C<#!>, directories are
333always readable and executable). On WinNT with the I<ntea> C<CYGWIN>
334setting, the additional mode bits are stored as extended file attributes.
335On WinNT with the I<ntsec> C<CYGWIN> setting, permissions use the standard
336WinNT security descriptors and access control lists. Without one of
47f4f673 337these options, these tests will fail (listing not updated yet):
1cab015a 338
f8dbba82 339 Failed Test List of failed
340 ------------------------------------
341 io/fs.t 5, 7, 9-10
342 lib/anydbm.t 2
343 lib/db-btree.t 20
344 lib/db-hash.t 16
345 lib/db-recno.t 18
346 lib/gdbm.t 2
f8dbba82 347 lib/ndbm.t 2
348 lib/odbm.t 2
349 lib/sdbm.t 2
350 op/stat.t 9, 20 (.tmp not an executable extension)
1cab015a 351
fb652349 352=head2 NDBM_File and ODBM_File do not work on FAT filesystems
353
354Do not use NDBM_File or ODBM_File on FAT filesystem. They can be
355built on a FAT filesystem, but many tests will fail:
356
357 ../ext/NDBM_File/ndbm.t 13 3328 71 59 83.10% 1-2 4 16-71
358 ../ext/ODBM_File/odbm.t 255 65280 ?? ?? % ??
359 ../lib/AnyDBM_File.t 2 512 12 2 16.67% 1 4
360 ../lib/Memoize/t/errors.t 0 139 11 5 45.45% 7-11
361 ../lib/Memoize/t/tie_ndbm.t 13 3328 4 4 100.00% 1-4
362 run/fresh_perl.t 97 1 1.03% 91
363
364If you intend to run only on FAT (or if using AnyDBM_File on FAT),
365run Configure with the -Ui_ndbm and -Ui_dbm options to prevent
366NDBM_File and ODBM_File being built.
367
368With NTFS (and CYGWIN=ntsec), there should be no problems even if
369perl was built on FAT.
370
538204d5 371=head2 C<fork()> failures in io_* tests
0be9fa5d 372
538204d5 373A C<fork()> failure may result in the following tests failing:
fb652349 374
375 ext/IO/lib/IO/t/io_multihomed.t
376 ext/IO/lib/IO/t/io_sock.t
377 ext/IO/lib/IO/t/io_unix.t
378
379See comment on fork in L<Miscellaneous> below.
0be9fa5d 380
a83b6f46 381=head2 Script Portability on Cygwin
1cab015a 382
b4bcd662 383Cygwin does an outstanding job of providing UNIX-like semantics on top of
384Win32 systems. However, in addition to the items noted above, there are
385some differences that you should know about. This is a very brief guide
386to portability, more information can be found in the Cygwin documentation.
1cab015a 387
f8dbba82 388=over 4
1cab015a 389
f8dbba82 390=item * Pathnames
1cab015a 391
a0457be1 392Cygwin pathnames can be separated by forward (F</>) or backward (F<\\>)
f8dbba82 393slashes. They may also begin with drive letters (F<C:>) or Universal
394Naming Codes (F<//UNC>). DOS device names (F<aux>, F<con>, F<prn>,
b4bcd662 395F<com*>, F<lpt?>, F<nul>) are invalid as base filenames. However, they
396can be used in extensions (e.g., F<hello.aux>). Names may contain all
397printable characters except these:
1cab015a 398
f8dbba82 399 : * ? " < > |
1cab015a 400
125a13ce 401File names are case insensitive, but case preserving. A pathname that
402contains a backslash or drive letter is a Win32 pathname (and not subject
403to the translations applied to POSIX style pathnames).
f8dbba82 404
405=item * Text/Binary
406
407When a file is opened it is in either text or binary mode. In text mode
5db16f6a 408a file is subject to CR/LF/Ctrl-Z translations. With Cygwin, the default
538204d5 409mode for an C<open()> is determined by the mode of the mount that underlies
410the file. Perl provides a C<binmode()> function to set binary mode on files
411that otherwise would be treated as text. C<sysopen()> with the C<O_TEXT>
5db16f6a 412flag sets text mode on files that otherwise would be treated as binary:
413
414 sysopen(FOO, "bar", O_WRONLY|O_CREAT|O_TEXT)
f8dbba82 415
538204d5 416C<lseek()>, C<tell()> and C<sysseek()> only work with files opened in binary
417mode.
5db16f6a 418
419The text/binary issue is covered at length in the Cygwin documentation.
f8dbba82 420
538204d5 421=item * PerlIO
422
423PerlIO overrides the default Cygwin Text/Binary behaviour. A file will
424always treated as binary, regardless which mode of the mount it lives on,
425just like it is in UNIX. So CR/LF translation needs to be requested in
426either the C<open()> call like this:
427
428 open(FH, ">:crlf", "out.txt");
429
430which will do conversion from LF to CR/LF on the output, or in the
431environment settings (add this to your .bashrc):
432
433 export PERLIO=crlf
434
435which will pull in the crlf PerlIO layer which does LF -> CRLF conversion
436on every output generated by perl.
437
f8dbba82 438=item * F<.exe>
439
538204d5 440The Cygwin C<stat()>, C<lstat()> and C<readlink()> functions make the F<.exe>
497711e7 441extension transparent by looking for F<foo.exe> when you ask for F<foo>
442(unless a F<foo> also exists). Cygwin does not require a F<.exe>
443extension, but I<gcc> adds it automatically when building a program.
444However, when accessing an executable as a normal file (e.g., I<cp>
445in a makefile) the F<.exe> is not transparent. The I<install> included
446with Cygwin automatically appends a F<.exe> when necessary.
f8dbba82 447
538204d5 448=item * C<chown()>
f8dbba82 449
538204d5 450On WinNT C<chown()> can change a file's user and group IDs. On Win9x C<chown()>
b4bcd662 451is a no-op, although this is appropriate since there is no security model.
f8dbba82 452
453=item * Miscellaneous
454
538204d5 455File locking using the C<F_GETLK> command to C<fcntl()> is a stub that
f8dbba82 456returns C<ENOSYS>.
457
538204d5 458Win9x can not C<rename()> an open file (although WinNT can).
1cab015a 459
538204d5 460The Cygwin C<chroot()> implementation has holes (it can not restrict file
125a13ce 461access by native Win32 programs).
462
c030f24b 463Inplace editing C<perl -i> of files doesn't work without doing a backup
464of the file being edited C<perl -i.bak> because of windowish restrictions,
538204d5 465therefore Perl adds the suffix C<.bak> automatically if you use C<perl -i>
27008580 466without specifying a backup extension.
818c4caa 467
538204d5 468Using C<fork()> after loading multiple dlls may fail with an internal cygwin
fb652349 469error like the following:
470
471 C:\CYGWIN\BIN\PERL.EXE: *** couldn't allocate memory 0x10000(4128768) for 'C:\CYGWIN\LIB\PERL5\5.6.1\CYGWIN-MULTI\AUTO\SOCKET\SOCKET.DLL' alignment, Win32 error 8
472
473 200 [main] perl 377147 sync_with_child: child -395691(0xB8) died before initialization with status code 0x1
474 1370 [main] perl 377147 sync_with_child: *** child state child loading dlls
475
27008580 476Use the rebase utility to resolve the conflicting dll addresses. The
477rebase package is included in the Cygwin netrelease. Use setup.exe from
538204d5 478F<http://www.cygwin.com/setup.exe> to install it and run rebaseall.
fb652349 479
1cab015a 480=back
481
a83b6f46 482=head1 INSTALL PERL ON CYGWIN
f8dbba82 483
b4bcd662 484This will install Perl, including I<man> pages.
f8dbba82 485
a0457be1 486 make install 2>&1 | tee log.make-install
5db16f6a 487
488NOTE: If C<STDERR> is redirected `C<make install>' will B<not> prompt
489you to install I<perl> into F</usr/bin>.
1cab015a 490
f8dbba82 491You may need to be I<Administrator> to run `C<make install>'. If you
492are not, you must have write access to the directories in question.
1cab015a 493
f8dbba82 494Information on installing the Perl documentation in HTML format can be
495found in the F<INSTALL> document.
1cab015a 496
a83b6f46 497=head1 MANIFEST ON CYGWIN
1cab015a 498
f8dbba82 499These are the files in the Perl release that contain references to Cygwin.
500These very brief notes attempt to explain the reason for all conditional
501code. Hopefully, keeping this up to date will allow the Cygwin port to
47f4f673 502be kept as clean as possible (listing not updated yet).
1cab015a 503
f8dbba82 504=over 4
1cab015a 505
f8dbba82 506=item Documentation
1cab015a 507
47dafe4d 508 INSTALL README.cygwin README.win32 MANIFEST
5d129265 509 Changes Changes5.005 Changes5.004 Changes5.6
47dafe4d 510 pod/perl.pod pod/perlport.pod pod/perlfaq3.pod
511 pod/perldelta.pod pod/perl5004delta.pod pod/perl56delta.pod
512 pod/perlhist.pod pod/perlmodlib.pod pod/buildtoc.PL pod/perltoc.pod
1cab015a 513
f8dbba82 514=item Build, Configure, Make, Install
1cab015a 515
f8dbba82 516 cygwin/Makefile.SHs
517 cygwin/ld2.in
518 cygwin/perlld.in
519 ext/IPC/SysV/hints/cygwin.pl
520 ext/NDBM_File/hints/cygwin.pl
521 ext/ODBM_File/hints/cygwin.pl
522 hints/cygwin.sh
f8dbba82 523 Configure - help finding hints from uname,
524 shared libperl required for dynamic loading
6b49d266 525 Makefile.SH - linklibperl
526 Porting/patchls - cygwin in port list
f8dbba82 527 installman - man pages with :: translated to .
5db16f6a 528 installperl - install dll/ld2/perlld, install to pods
6b49d266 529 makedepend.SH - uwinfix
1cab015a 530
f8dbba82 531=item Tests
1cab015a 532
f8dbba82 533 t/io/tell.t - binmode
5d129265 534 t/lib/b.t - ignore Cwd from os_extras
5db16f6a 535 t/lib/glob-basic.t - Win32 directory list access differs from read mode
536 t/op/magic.t - $^X/symlink WORKAROUND, s/.exe//
537 t/op/stat.t - no /dev, skip Win32 ftCreationTime quirk
538 (cache manager sometimes preserves ctime of file
539 previously created and deleted), no -u (setuid)
f8dbba82 540
541=item Compiled Perl Source
542
f8dbba82 543 EXTERN.h - __declspec(dllimport)
544 XSUB.h - __declspec(dllexport)
b4bcd662 545 cygwin/cygwin.c - os_extras (getcwd, spawn)
6b49d266 546 perl.c - os_extras
f8dbba82 547 perl.h - binmode
6b49d266 548 doio.c - win9x can not rename a file when it is open
b4bcd662 549 pp_sys.c - do not define h_errno, pp_system with spawn
47dafe4d 550 util.c - use setenv
f8dbba82 551
552=item Compiled Module Source
553
554 ext/POSIX/POSIX.xs - tzname defined externally
555 ext/SDBM_File/sdbm/pair.c
556 - EXTCONST needs to be redefined from EXTERN.h
557 ext/SDBM_File/sdbm/sdbm.c
558 - binary open
559
560=item Perl Modules/Scripts
561
6b49d266 562 lib/Cwd.pm - hook to internal Cwd::cwd
f8dbba82 563 lib/ExtUtils/MakeMaker.pm
564 - require MM_Cygwin.pm
565 lib/ExtUtils/MM_Cygwin.pm
566 - canonpath, cflags, manifypods, perl_archive
497711e7 567 lib/File/Find.pm - on remote drives stat() always sets st_nlink to 1
6b49d266 568 lib/File/Spec/Unix.pm - preserve //unc
5d129265 569 lib/File/Temp.pm - no directory sticky bit
6b49d266 570 lib/perl5db.pl - use stdin not /dev/tty
6b49d266 571 utils/perldoc.PL - version comment
1cab015a 572
573=back
f89d6eaa 574
a83b6f46 575=head1 BUGS ON CYGWIN
f8dbba82 576
125a13ce 577Support for swapping real and effective user and group IDs is incomplete.
538204d5 578On WinNT Cygwin provides C<setuid()>, C<seteuid()>, C<setgid()> and C<setegid()>.
125a13ce 579However, additional Cygwin calls for manipulating WinNT access tokens
580and security contexts are required.
581
f8dbba82 582=head1 AUTHORS
583
b4bcd662 584Charles Wilson <cwilson@ece.gatech.edu>,
47dafe4d 585Eric Fifer <egf7@columbia.edu>,
b4bcd662 586alexander smishlajev <als@turnhere.com>,
587Steven Morlock <newspost@morlock.net>,
588Sebastien Barre <Sebastien.Barre@utc.fr>,
a0457be1 589Teun Burgers <burgers@ecn.nl>,
27008580 590Gerrit P. Haase <gp@familiehaase.de>.
f8dbba82 591
592=head1 HISTORY
593
27008580 594Last updated: 2003-03-20