A recent net or commercial release of Cygwin is required.
-At the time this document was last updated, Cygwin 1.3.22 was current.
+At the time this document was last updated, Cygwin 1.5.2 was current.
=head2 Cygwin Configuration
On WinNT with either the I<ntea> or I<ntsec> C<CYGWIN> settings, directory
and file permissions may not be set correctly. Since the build process
-creates directories and files, to be safe you may want to run a `C<chmod
--R +w *>' on the entire Perl source tree.
+creates directories and files, to be safe you may want to run a
+C<chmod -R +w *> on the entire Perl source tree.
Also, it is a well known WinNT "feature" that files created by a login
that is a member of the I<Administrators> group will be owned by the
GDBM is available for Cygwin.
+NOTE: The GDBM library only works on NTFS partitions.
+
=item * C<-ldb> (C<use DB_File>)
-BerkeleyDB is available for Cygwin. Some details can be found in
-F<ext/DB_File/DB_File.pm>.
+BerkeleyDB is available for Cygwin.
NOTE: The BerkeleyDB library only completely works on NTFS partitions.
and on Win9x the I<shm*()> functions seem to hang. It also creates
a compile time dependency because F<perl.h> includes F<<sys/ipc.h>>
and F<<sys/sem.h>> (which will be required in the future when compiling
-CPAN modules). NO LONGER SUPPORTED!
+CPAN modules). CURRENTLY NOT SUPPORTED!
=item * C<-lutil>
=item * C<-Uuseperlio>
-Undefining this symbol disables the PerlIO abstraction, PerlIO is now the
-default, it is not recommended to disable PerlIO.
+Undefining this symbol disables the PerlIO abstraction. PerlIO is now the
+default; it is not recommended to disable PerlIO.
=item * C<-Dusemultiplicity>
=item * C<-Duse64bitint>
By default Perl uses 32 bit integers. If you want to use larger 64
-bit integers, define this symbol. If there is trouble, check that
-your Cygwin installation is up to date.
+bit integers, define this symbol.
=item * C<-Duselongdouble>
=item * C<-Dusethreads>
POSIX threads are implemented in Cygwin, define this symbol if you want
-a threaded perl. If there is trouble, check that your Cygwin installation
-is up to date.
+a threaded perl.
=item * C<-Duselargefiles>
-Although Win32 supports large files, Cygwin currently uses 32-bit integers
-for internal size and position calculations.
+Cygwin uses 64-bit integers for internal size and position calculations,
+this will be correctly detected and defined by Configure.
=item * C<-Dmksymlinks>
Use this to build perl outside of the source tree. This works with Cygwin.
Details can be found in the F<INSTALL> document. This is the recommended
-way to build perl form sources.
+way to build perl from sources.
=back
=item * I<dlsym()>
I<ld2> is needed to build dynamic libraries, but it does not exist
-when C<dlsym()> checking occurs (it is not created until `C<make>' runs).
+when C<dlsym()> checking occurs (it is not created until C<make> runs).
You will see the following message:
Checking whether your C<dlsym()> needs a leading underscore ...
make 2>&1 | tee log.make
-=head2 Warnings on Cygwin
+=head2 Errors on Cygwin
-Warnings like these are normal:
+Errors like these are normal:
- perl.c: In function `S_parse_body':
- perl.c:1468: warning: implicit declaration of function `init_os_extras'
- ...
- pp_sys.c:289: warning: `S_emulate_eaccess' defined but not used
- ...
- perlio.c: In function `perlsio_binmode':
- perlio.c:98: warning: implicit declaration of function `setmode'
- perlio.c:98: warning: passing arg 1 of `Perl_PerlIO_fileno' from incompatible pointer type
...
make: [extra.pods] Error 1 (ignored)
...
=head2 ld2 on Cygwin
-During `C<make>', I<ld2> will be created and installed in your $installbin
+During C<make>, I<ld2> will be created and installed in your $installbin
directory (where you said to put public executables). It does not
-wait until the `C<make install>' process to install the I<ld2> script,
-this is because the remainder of the `C<make>' refers to I<ld2> without
+wait until the C<make install> process to install the I<ld2> script,
+this is because the remainder of the C<make> refers to I<ld2> without
fully specifying its path and does this from multiple subdirectories.
The assumption is that $installbin is in your current C<PATH>. If this
-is not the case `C<make>' will fail at some point. If this happens,
+is not the case C<make> will fail at some point. If this happens,
just manually copy I<ld2> from the source directory to somewhere in
your C<PATH>.
cd t;./perl harness 2>&1 | tee ../log.harness
The same tests are run both times, but more information is provided when
-running as `C<./perl harness>'.
+running as C<./perl harness>.
Test results vary depending on your host system and your Cygwin
configuration. If a test can pass in some Cygwin setup, it is always
See comment on fork in L<Miscellaneous> below.
+=head1 Specific features of the Cygwin port
+
=head2 Script Portability on Cygwin
Cygwin does an outstanding job of providing UNIX-like semantics on top of
in a makefile) the F<.exe> is not transparent. The I<install> included
with Cygwin automatically appends a F<.exe> when necessary.
+=item * cygwin vs. windows process ids
+
+Cygwin processes have their own pid, which is different from the
+underlying windows pid. Most posix compliant Proc functions expect
+the cygwin pid, but several Win32::Process functions expect the
+winpid. E.g. C<$$> is the cygwin pid of F</usr/bin/perl>, which is not
+the winpid. Use C<Cygwin::winpid_to_pid()> and C<Cygwin::winpid_to_pid()>
+to translate between them.
+
=item * C<chown()>
On WinNT C<chown()> can change a file's user and group IDs. On Win9x C<chown()>
=back
+=head2 Prebuilt methods:
+
+=over 4
+
+=item C<Cwd::cwd>
+
+Returns current working directory.
+
+=item C<Cygwin::pid_to_winpid>
+
+Translates a cygwin pid to the corresponding Windows pid (which may or
+may not be the same).
+
+=item C<Cygwin::winpid_to_pid>
+
+Translates a Windows pid to the corresponding cygwin pid (if any).
+
+=back
+
=head1 INSTALL PERL ON CYGWIN
This will install Perl, including I<man> pages.
make install 2>&1 | tee log.make-install
-NOTE: If C<STDERR> is redirected `C<make install>' will B<not> prompt
+NOTE: If C<STDERR> is redirected C<make install> will B<not> prompt
you to install I<perl> into F</usr/bin>.
-You may need to be I<Administrator> to run `C<make install>'. If you
+You may need to be I<Administrator> to run C<make install>. If you
are not, you must have write access to the directories in question.
Information on installing the Perl documentation in HTML format can be
Changes Changes5.005 Changes5.004 Changes5.6
pod/perl.pod pod/perlport.pod pod/perlfaq3.pod
pod/perldelta.pod pod/perl5004delta.pod pod/perl56delta.pod
- pod/perlhist.pod pod/perlmodlib.pod pod/buildtoc.PL pod/perltoc.pod
+ pod/perlhist.pod pod/perlmodlib.pod perl/buildtoc pod/perltoc.pod
=item Build, Configure, Make, Install
t/op/stat.t - no /dev, skip Win32 ftCreationTime quirk
(cache manager sometimes preserves ctime of file
previously created and deleted), no -u (setuid)
+ t/lib/cygwin.t - builtin cygwin function tests
=item Compiled Perl Source
EXTERN.h - __declspec(dllimport)
XSUB.h - __declspec(dllexport)
- cygwin/cygwin.c - os_extras (getcwd, spawn)
+ cygwin/cygwin.c - os_extras (getcwd, spawn, Cygwin::winpid_to_pid,
+ Cygwin::pid_to_winpid)
perl.c - os_extras
perl.h - binmode
doio.c - win9x can not rename a file when it is open
=head1 HISTORY
-Last updated: 2003-03-20
+Last updated: 2005-02-11
https://perl5.git.perl.org / perl5.git / blobdiff