This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Re: Bug in perlguts documentation?
[perl5.git] / README.cygwin
CommitLineData
8736538c
AS
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
GS
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
b4bcd662 16version of Perl is provided on the Cygwin CD. If you do not need to
f8dbba82 17customize the configuration, consider using one of these packages:
5aabfad6 18
f8dbba82 19 http://cygutils.netpedia.net/
5aabfad6 20
f8dbba82 21=head1 PREREQUISITES
8736538c 22
f8dbba82 23=head2 Cygwin = GNU+Cygnus+Windows (Don't leave UNIX without it)
8736538c 24
f8dbba82
GS
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
47dafe4d 34At the time this document was last updated, Cygwin 1.1.5 was current.
8736538c 35
f8dbba82
GS
36B<NOTE:> At this point, minimal effort has been made to provide
37compatibility with old (beta) Cygwin releases. The focus has been to
38provide a high quality release and not worry about working around old
125a13ce
FE
39bugs. If you wish to use Perl with Cygwin B20.1 or earlier, consider
40using perl5.005_03, which is available in source and binary form at
41C<http://cygutils.netpedia.net/>. If there is significant demand,
42a patch kit can be developed to port back to earlier Cygwin versions.
1cab015a 43
f8dbba82 44=head2 Cygwin Configuration
1cab015a 45
f8dbba82
GS
46While building Perl some changes may be necessary to your Cygwin setup so
47that Perl builds cleanly. These changes are B<not> required for normal
48Perl usage.
1cab015a 49
f8dbba82 50B<NOTE:> The binaries that are built will run on all Win32 versions.
125a13ce
FE
51They do not depend on your host system (Win9x/WinME, WinNT/Win2K)
52or your Cygwin configuration (I<ntea>, I<ntsec>, binary/text mounts).
53The only dependencies come from hard-coded pathnames like C</usr/local>.
54However, your host system and Cygwin configuration will affect Perl's
55runtime behavior (see L</"TEST">).
1cab015a 56
f8dbba82 57=over 4
1cab015a 58
f8dbba82 59=item * C<PATH>
1cab015a 60
f8dbba82
GS
61Set the C<PATH> environment variable so that Configure finds the Cygwin
62versions of programs. Any Windows directories should be removed or
63moved to the end of your C<PATH>.
1cab015a 64
f8dbba82 65=item * I<nroff>
1cab015a 66
f8dbba82 67If you do not have I<nroff> (which is part of the I<groff> package),
b4bcd662 68Configure will B<not> prompt you to install I<man> pages.
f8dbba82
GS
69
70=item * Permissions
71
72On WinNT with either the I<ntea> or I<ntsec> C<CYGWIN> settings, directory
73and file permissions may not be set correctly. Since the build process
125a13ce 74creates directories and files, to be safe you may want to run a `C<chmod
f8dbba82
GS
75-R +w *>' on the entire Perl source tree.
76
77Also, it is a well known WinNT "feature" that files created by a login
78that is a member of the I<Administrators> group will be owned by the
79I<Administrators> group. Depending on your umask, you may find that you
80can not write to files that you just created (because you are no longer
81the owner). When using the I<ntsec> C<CYGWIN> setting, this is not an
82issue because it "corrects" the ownership to what you would expect on
83a UNIX system.
1cab015a 84
8736538c
AS
85=back
86
f8dbba82 87=head1 CONFIGURE
8736538c 88
f8dbba82
GS
89The default options gathered by Configure with the assistance of
90F<hints/cygwin.sh> will build a Perl that supports dynamic loading
91(which requires a shared F<libperl.dll>).
f89d6eaa 92
f8dbba82 93This will run Configure and keep a record:
8736538c 94
f8dbba82 95 ./Configure 2>&1 | tee log.configure
8736538c 96
b4bcd662 97If you are willing to accept all the defaults run Configure with B<-de>.
f8dbba82 98However, several useful customizations are available.
5aabfad6 99
f8dbba82 100=head2 Strip Binaries
5aabfad6 101
f8dbba82
GS
102It is possible to strip the EXEs and DLLs created by the build process.
103The resulting binaries will be significantly smaller. If you want the
104binaries to be stripped, you can either add a B<-s> option when Configure
105prompts you,
8736538c 106
f8dbba82 107 Any additional ld flags (NOT including libraries)? [none] -s
5db16f6a 108 Any special flags to pass to gcc to use dynamic linking? [none] -s
f8dbba82
GS
109 Any special flags to pass to ld2 to create a dynamically loaded library?
110 [none] -s
8736538c 111
f8dbba82
GS
112or you can edit F<hints/cygwin.sh> and uncomment the relevant variables
113near the end of the file.
8736538c 114
f8dbba82 115=head2 Optional Libraries
8736538c 116
f8dbba82
GS
117Several Perl functions and modules depend on the existence of
118some optional libraries. Configure will find them if they are
119installed in one of the directories listed as being used for library
120searches. Pre-built packages for most of these are available at
121C<http://cygutils.netpedia.net/>.
8736538c 122
f8dbba82 123=over 4
8736538c 124
f8dbba82 125=item * C<-lcrypt>
8736538c 126
125a13ce
FE
127The crypt package distributed with Cygwin is a Linux compatible 56-bit
128DES crypt port by Corinna Vinschen.
129
130Alternatively, the crypt libraries in GNU libc have been ported to Cygwin.
1cab015a 131
5db16f6a 132The DES based Ultra Fast Crypt port was done by Alexey Truhan:
1cab015a 133
b4bcd662 134 ftp://ftp.franken.de/pub/win32/develop/gnuwin32/cygwin/porters/Okhapkin_Sergey/cw32crypt-dist-0.tgz
f8dbba82
GS
135
136NOTE: There are various export restrictions on DES implementations,
137see the glibc README for more details.
1cab015a 138
f8dbba82 139The MD5 port was done by Andy Piper:
1cab015a 140
b4bcd662 141 ftp://ftp.franken.de/pub/win32/develop/gnuwin32/cygwin/porters/Okhapkin_Sergey/libcrypt.tgz
1cab015a 142
f8dbba82 143=item * C<-lgdbm> (C<use GDBM_File>)
1cab015a 144
f8dbba82
GS
145GDBM is available for Cygwin. GDBM's ndbm/dbm compatibility feature
146also makes C<NDBM_File> and C<ODBM_File> possible (although they add
147little extra value).
1cab015a 148
125a13ce
FE
149NOTE: The ndbm/dbm emulations only completely work on NTFS partitions.
150
f8dbba82 151=item * C<-ldb> (C<use DB_File>)
1cab015a 152
f8dbba82
GS
153BerkeleyDB is available for Cygwin. Some details can be found in
154F<ext/DB_File/DB_File.pm>.
1cab015a 155
125a13ce
FE
156NOTE: The BerkeleyDB library only completely works on NTFS partitions.
157
f8dbba82
GS
158=item * C<-lcygipc> (C<use IPC::SysV>)
159
6b49d266
FE
160A port of SysV IPC is available for Cygwin.
161
162NOTE: This has B<not> been extensively tested. In particular,
b4bcd662
GS
163C<d_semctl_semun> is undefined because it fails a Configure test
164and on Win9x the I<shm*()> functions seem to hang. It also creates
165a compile time dependency because F<perl.h> includes F<<sys/ipc.h>>
166and F<<sys/sem.h>> (which will be required in the future when compiling
167CPAN modules).
1cab015a
FE
168
169=back
170
f8dbba82
GS
171=head2 Configure-time Options
172
0a110db2
GS
173The F<INSTALL> document describes several Configure-time options. Some of
174these will work with Cygwin, others are not yet possible. Also, some of
175these are experimental. You can either select an option when Configure
176prompts you or you can define (undefine) symbols on the command line.
f8dbba82
GS
177
178=over 4
179
180=item * C<-Uusedl>
181
0a110db2 182Undefining this symbol forces Perl to be compiled statically.
f8dbba82
GS
183
184=item * C<-Uusemymalloc>
1cab015a 185
f8dbba82 186By default Perl uses the malloc() included with the Perl source. If you
0a110db2 187want to force Perl to build with the system malloc() undefine this symbol.
1cab015a 188
6b49d266 189=item * C<-Dusemultiplicity>
1cab015a 190
f8dbba82
GS
191Multiplicity is required when embedding Perl in a C program and using
192more than one interpreter instance. This works with the Cygwin port.
1cab015a 193
f8dbba82 194=item * C<-Duseperlio>
1cab015a 195
f8dbba82 196The PerlIO abstraction works with the Cygwin port.
1cab015a 197
0a110db2 198=item * C<-Duse64bitint>
1cab015a 199
f8dbba82 200I<gcc> supports 64-bit integers. However, several additional long long
5db16f6a 201functions are necessary to use them within Perl (I<{strtol,strtoul}l>).
f8dbba82 202These are B<not> yet available with Cygwin.
1cab015a 203
f8dbba82 204=item * C<-Duselongdouble>
1cab015a 205
f8dbba82
GS
206I<gcc> supports long doubles (12 bytes). However, several additional
207long double math functions are necessary to use them within Perl
5d129265 208(I<{atan2,cos,exp,floor,fmod,frexp,isnan,log,modf,pow,sin,sqrt}l,strtold>).
f8dbba82 209These are B<not> yet available with Cygwin.
1cab015a 210
f8dbba82 211=item * C<-Dusethreads>
1cab015a 212
f8dbba82
GS
213POSIX threads are B<not> yet implemented in Cygwin.
214
215=item * C<-Duselargefiles>
216
0a110db2 217Although Win32 supports large files, Cygwin currently uses 32-bit integers
5db16f6a 218for internal size and position calculations.
1cab015a
FE
219
220=back
221
f8dbba82 222=head2 Suspicious Warnings
1cab015a 223
f8dbba82 224You may see some messages during Configure that seem suspicious.
8736538c 225
f8dbba82 226=over 4
8736538c 227
b4bcd662 228=item * I<dlsym()>
0a110db2
GS
229
230I<ld2> is needed to build dynamic libraries, but it does not exist
231when dlsym() checking occurs (it is not created until `C<make>' runs).
232You will see the following message:
233
234 Checking whether your dlsym() needs a leading underscore ...
b4bcd662 235 ld2: not found
0a110db2
GS
236 I can't compile and run the test program.
237 I'm guessing that dlsym doesn't need a leading underscore.
238
239Since the guess is correct, this is not a problem.
240
b4bcd662 241=item * Win9x and C<d_eofnblk>
5db16f6a
FE
242
243Win9x does not correctly report C<EOF> with a non-blocking read on a
244closed pipe. You will see the following messages:
245
246 But it also returns -1 to signal EOF, so be careful!
247 WARNING: you can't distinguish between EOF and no data!
248
249 *** WHOA THERE!!! ***
250 The recommended value for $d_eofnblk on this machine was "define"!
251 Keep the recommended value? [y]
252
253At least for consistency with WinNT, you should keep the recommended
254value.
255
0a110db2
GS
256=item * Compiler/Preprocessor defines
257
258The following error occurs because of the Cygwin C<#define> of
259C<_LONG_DOUBLE>:
260
261 Guessing which symbols your C compiler and preprocessor define...
5d129265 262 try.c:<line#>: parse error
0a110db2
GS
263
264This failure does not seem to cause any problems.
265
5db16f6a
FE
266=back
267
f8dbba82 268=head1 MAKE
5aabfad6 269
b4bcd662 270Simply run I<make> and wait:
f8dbba82
GS
271
272 make 2>&1 | tee log.make
273
274=head2 Warnings
275
276Warnings like these are normal:
277
278 warning: overriding commands for target <file>
279 warning: ignoring old commands for target <file>
280
125a13ce
FE
281 dllwrap: no export definition file provided
282 dllwrap: creating one, but that may not be what you want
f8dbba82
GS
283
284=head2 ld2
285
286During `C<make>', I<ld2> will be created and installed in your $installbin
287directory (where you said to put public executables). It does not
288wait until the `C<make install>' process to install the I<ld2> script,
289this is because the remainder of the `C<make>' refers to I<ld2> without
290fully specifying its path and does this from multiple subdirectories.
291The assumption is that $installbin is in your current C<PATH>. If this
b4bcd662
GS
292is not the case `C<make>' will fail at some point. If this happens,
293just manually copy I<ld2> from the source directory to somewhere in
294your C<PATH>.
f8dbba82
GS
295
296=head1 TEST
297
298There are two steps to running the test suite:
299
300 make test 2>&1 | tee log.make-test
301
302 cd t;./perl harness 2>&1 | tee ../log.harness
303
304The same tests are run both times, but more information is provided when
305running as `C<./perl harness>'.
5aabfad6 306
f8dbba82 307Test results vary depending on your host system and your Cygwin
b4bcd662
GS
308configuration. If a test can pass in some Cygwin setup, it is always
309attempted and explainable test failures are documented. It is possible
125a13ce
FE
310for Perl to pass all the tests, but it is more likely that some tests
311will fail for one of the reasons listed below.
1cab015a 312
f8dbba82 313=head2 File Permissions
1cab015a 314
f8dbba82 315UNIX file permissions are based on sets of mode bits for
b4bcd662
GS
316{read,write,execute} for each {user,group,other}. By default Cygwin
317only tracks the Win32 read-only attribute represented as the UNIX file
318user write bit (files are always readable, files are executable if they
319have a F<.{com,bat,exe}> extension or begin with C<#!>, directories are
320always readable and executable). On WinNT with the I<ntea> C<CYGWIN>
321setting, the additional mode bits are stored as extended file attributes.
322On WinNT with the I<ntsec> C<CYGWIN> setting, permissions use the standard
323WinNT security descriptors and access control lists. Without one of
324these options, these tests will fail:
1cab015a 325
f8dbba82
GS
326 Failed Test List of failed
327 ------------------------------------
328 io/fs.t 5, 7, 9-10
329 lib/anydbm.t 2
330 lib/db-btree.t 20
331 lib/db-hash.t 16
332 lib/db-recno.t 18
333 lib/gdbm.t 2
f8dbba82
GS
334 lib/ndbm.t 2
335 lib/odbm.t 2
336 lib/sdbm.t 2
337 op/stat.t 9, 20 (.tmp not an executable extension)
1cab015a 338
f8dbba82 339=head2 Hard Links
1cab015a 340
f8dbba82 341FAT partitions do not support hard links (whereas NTFS does), in which
497711e7
GS
342case Cygwin implements link() by copying the file. On remote (network)
343drives Cygwin's stat() always sets C<st_nlink> to 1, so the link count
125a13ce 344for remote directories and files is not available. In either case,
497711e7 345these tests will fail:
1cab015a 346
f8dbba82
GS
347 Failed Test List of failed
348 ------------------------------------
349 io/fs.t 4
350 op/stat.t 3
1cab015a 351
f8dbba82 352=head2 Filetime Granularity
1cab015a 353
f8dbba82
GS
354On FAT partitions the filetime granularity is 2 seconds. The following
355test will fail:
1cab015a 356
f8dbba82
GS
357 Failed Test List of failed
358 ------------------------------------
359 io/fs.t 18
1cab015a 360
f8dbba82 361=head2 Tainting Checks
1cab015a 362
f8dbba82
GS
363When Perl is running in taint mode, C<$ENV{PATH}> is considered tainted
364and not used, so DLLs not in the default system directories will not
365be found. While the tests are running you will see warnings popup from
366the system with messages like:
1cab015a 367
f8dbba82
GS
368 Win9x
369 Error Starting Program
370 A required .DLL file, CYGWIN1.DLL, was not found
1cab015a 371
f8dbba82 372 WinNT
125a13ce 373 perl.exe - Unable to Locate DLL
f8dbba82
GS
374 The dynamic link library cygwin1.dll could not be found in the
375 specified path ...
1cab015a 376
f8dbba82
GS
377Just click OK and ignore them. When running `C<make test>', 2 popups
378occur. During `C<./perl harness>', 4 popups occur. Also, these tests
379will fail:
1cab015a 380
f8dbba82
GS
381 Failed Test List of failed
382 ------------------------------------
383 op/taint.t 1, 3, 31, 37
1cab015a 384
b4bcd662
GS
385Alternatively, you can copy F<cygwin1.dll> into the directory where the
386tests run:
387
125a13ce 388 cp /bin/cygwin1.dll t
b4bcd662
GS
389
390or one of the Windows system directories (although, this is B<not>
391recommended).
1cab015a 392
f8dbba82 393=head2 /etc/group
5aabfad6 394
5db16f6a 395Cygwin does not require F</etc/group>, in which case the F<op/grent.t>
f8dbba82
GS
396test will be skipped. The check performed by F<op/grent.t> expects to
397see entries that use the members field, otherwise this test will fail:
f89d6eaa 398
f8dbba82
GS
399 Failed Test List of failed
400 ------------------------------------
401 op/grent.t 1
1cab015a 402
f8dbba82 403=head2 Script Portability
1cab015a 404
b4bcd662
GS
405Cygwin does an outstanding job of providing UNIX-like semantics on top of
406Win32 systems. However, in addition to the items noted above, there are
407some differences that you should know about. This is a very brief guide
408to portability, more information can be found in the Cygwin documentation.
1cab015a 409
f8dbba82 410=over 4
1cab015a 411
f8dbba82 412=item * Pathnames
1cab015a 413
f8dbba82
GS
414Cygwin pathnames can be separated by forward (F</>) or backward (F<\>)
415slashes. They may also begin with drive letters (F<C:>) or Universal
416Naming Codes (F<//UNC>). DOS device names (F<aux>, F<con>, F<prn>,
b4bcd662
GS
417F<com*>, F<lpt?>, F<nul>) are invalid as base filenames. However, they
418can be used in extensions (e.g., F<hello.aux>). Names may contain all
419printable characters except these:
1cab015a 420
f8dbba82 421 : * ? " < > |
1cab015a 422
125a13ce
FE
423File names are case insensitive, but case preserving. A pathname that
424contains a backslash or drive letter is a Win32 pathname (and not subject
425to the translations applied to POSIX style pathnames).
f8dbba82
GS
426
427=item * Text/Binary
428
429When a file is opened it is in either text or binary mode. In text mode
5db16f6a
FE
430a file is subject to CR/LF/Ctrl-Z translations. With Cygwin, the default
431mode for an open() is determined by the mode of the mount that underlies
432the file. Perl provides a binmode() function to set binary mode on files
433that otherwise would be treated as text. sysopen() with the C<O_TEXT>
434flag sets text mode on files that otherwise would be treated as binary:
435
436 sysopen(FOO, "bar", O_WRONLY|O_CREAT|O_TEXT)
f8dbba82 437
5db16f6a
FE
438lseek(), tell() and sysseek() only work with files opened in binary mode.
439
440The text/binary issue is covered at length in the Cygwin documentation.
f8dbba82
GS
441
442=item * F<.exe>
443
497711e7
GS
444The Cygwin stat(), lstat() and readlink() functions make the F<.exe>
445extension transparent by looking for F<foo.exe> when you ask for F<foo>
446(unless a F<foo> also exists). Cygwin does not require a F<.exe>
447extension, but I<gcc> adds it automatically when building a program.
448However, when accessing an executable as a normal file (e.g., I<cp>
449in a makefile) the F<.exe> is not transparent. The I<install> included
450with Cygwin automatically appends a F<.exe> when necessary.
f8dbba82
GS
451
452=item * chown()
453
b4bcd662
GS
454On WinNT chown() can change a file's user and group IDs. On Win9x chown()
455is a no-op, although this is appropriate since there is no security model.
f8dbba82
GS
456
457=item * Miscellaneous
458
459File locking using the C<F_GETLK> command to fcntl() is a stub that
460returns C<ENOSYS>.
461
f8dbba82 462Win9x can not rename() an open file (although WinNT can).
1cab015a 463
125a13ce
FE
464The Cygwin chroot() implementation has holes (it can not restrict file
465access by native Win32 programs).
466
1cab015a
FE
467=back
468
f8dbba82
GS
469=head1 INSTALL
470
b4bcd662 471This will install Perl, including I<man> pages.
f8dbba82 472
5db16f6a
FE
473 make install | tee log.make-install
474
475NOTE: If C<STDERR> is redirected `C<make install>' will B<not> prompt
476you to install I<perl> into F</usr/bin>.
1cab015a 477
f8dbba82
GS
478You may need to be I<Administrator> to run `C<make install>'. If you
479are not, you must have write access to the directories in question.
1cab015a 480
f8dbba82
GS
481Information on installing the Perl documentation in HTML format can be
482found in the F<INSTALL> document.
1cab015a 483
f8dbba82 484=head1 MANIFEST
1cab015a 485
f8dbba82
GS
486These are the files in the Perl release that contain references to Cygwin.
487These very brief notes attempt to explain the reason for all conditional
488code. Hopefully, keeping this up to date will allow the Cygwin port to
489be kept as clean as possible.
1cab015a 490
f8dbba82 491=over 4
1cab015a 492
f8dbba82 493=item Documentation
1cab015a 494
47dafe4d 495 INSTALL README.cygwin README.win32 MANIFEST
5d129265 496 Changes Changes5.005 Changes5.004 Changes5.6
47dafe4d
FE
497 pod/perl.pod pod/perlport.pod pod/perlfaq3.pod
498 pod/perldelta.pod pod/perl5004delta.pod pod/perl56delta.pod
499 pod/perlhist.pod pod/perlmodlib.pod pod/buildtoc.PL pod/perltoc.pod
1cab015a 500
f8dbba82 501=item Build, Configure, Make, Install
1cab015a 502
f8dbba82
GS
503 cygwin/Makefile.SHs
504 cygwin/ld2.in
505 cygwin/perlld.in
506 ext/IPC/SysV/hints/cygwin.pl
507 ext/NDBM_File/hints/cygwin.pl
508 ext/ODBM_File/hints/cygwin.pl
509 hints/cygwin.sh
f8dbba82
GS
510 Configure - help finding hints from uname,
511 shared libperl required for dynamic loading
6b49d266
FE
512 Makefile.SH - linklibperl
513 Porting/patchls - cygwin in port list
f8dbba82 514 installman - man pages with :: translated to .
5db16f6a 515 installperl - install dll/ld2/perlld, install to pods
6b49d266 516 makedepend.SH - uwinfix
1cab015a 517
f8dbba82 518=item Tests
1cab015a 519
f8dbba82 520 t/io/tell.t - binmode
5d129265 521 t/lib/b.t - ignore Cwd from os_extras
5db16f6a
FE
522 t/lib/glob-basic.t - Win32 directory list access differs from read mode
523 t/op/magic.t - $^X/symlink WORKAROUND, s/.exe//
524 t/op/stat.t - no /dev, skip Win32 ftCreationTime quirk
525 (cache manager sometimes preserves ctime of file
526 previously created and deleted), no -u (setuid)
f8dbba82
GS
527
528=item Compiled Perl Source
529
f8dbba82
GS
530 EXTERN.h - __declspec(dllimport)
531 XSUB.h - __declspec(dllexport)
b4bcd662 532 cygwin/cygwin.c - os_extras (getcwd, spawn)
6b49d266 533 perl.c - os_extras
f8dbba82 534 perl.h - binmode
6b49d266 535 doio.c - win9x can not rename a file when it is open
b4bcd662 536 pp_sys.c - do not define h_errno, pp_system with spawn
47dafe4d 537 util.c - use setenv
f8dbba82
GS
538
539=item Compiled Module Source
540
541 ext/POSIX/POSIX.xs - tzname defined externally
542 ext/SDBM_File/sdbm/pair.c
543 - EXTCONST needs to be redefined from EXTERN.h
544 ext/SDBM_File/sdbm/sdbm.c
545 - binary open
546
547=item Perl Modules/Scripts
548
6b49d266 549 lib/Cwd.pm - hook to internal Cwd::cwd
f8dbba82
GS
550 lib/ExtUtils/MakeMaker.pm
551 - require MM_Cygwin.pm
552 lib/ExtUtils/MM_Cygwin.pm
553 - canonpath, cflags, manifypods, perl_archive
497711e7 554 lib/File/Find.pm - on remote drives stat() always sets st_nlink to 1
6b49d266 555 lib/File/Spec/Unix.pm - preserve //unc
5d129265 556 lib/File/Temp.pm - no directory sticky bit
6b49d266 557 lib/perl5db.pl - use stdin not /dev/tty
6b49d266 558 utils/perldoc.PL - version comment
1cab015a
FE
559
560=back
f89d6eaa 561
f8dbba82
GS
562=head1 BUGS
563
b4bcd662 564When I<make> starts, it warns about overriding commands for F<perlmain.o>.
f8dbba82 565
125a13ce 566`C<make clean>' does not remove library F<.def> or F<.exe.stackdump>
f8dbba82
GS
567files.
568
569The I<ld2> script contains references to the source directory. You should
b4bcd662 570change these to $installbin after `C<make install>'.
f8dbba82 571
125a13ce
FE
572Support for swapping real and effective user and group IDs is incomplete.
573On WinNT Cygwin provides setuid(), seteuid(), setgid() and setegid().
574However, additional Cygwin calls for manipulating WinNT access tokens
575and security contexts are required.
576
b53af0b8
EF
577When building DLLs, `C<dllwrap --export-all-symbols>' is used to export
578global symbols. It might be better to generate an explicit F<.def> file
579(see F<makedef.pl>). Also, DLLs can now be build with `C<gcc -shared>'.
580
f8dbba82
GS
581=head1 AUTHORS
582
b4bcd662 583Charles Wilson <cwilson@ece.gatech.edu>,
47dafe4d 584Eric Fifer <egf7@columbia.edu>,
b4bcd662
GS
585alexander smishlajev <als@turnhere.com>,
586Steven Morlock <newspost@morlock.net>,
587Sebastien Barre <Sebastien.Barre@utc.fr>,
588Teun Burgers <burgers@ecn.nl>.
f8dbba82
GS
589
590=head1 HISTORY
591
b53af0b8 592Last updated: 9 November 2000