A recent net or commercial release of Cygwin is required.
-At the time this document was last updated, Cygwin 1.3.5 was current.
+At the time this document was last updated, Cygwin 1.3.12 was current.
=head2 Cygwin Configuration
The DES based Ultra Fast Crypt port was done by Alexey Truhan:
- ftp://ftp.franken.de/pub/win32/develop/gnuwin32/cygwin/porters/Okhapkin_Sergey/cw32crypt-dist-0.tgz
+ ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/porters/Okhapkin_Sergey/cw32crypt-dist-0.tgz
NOTE: There are various export restrictions on DES implementations,
see the glibc README for more details.
The MD5 port was done by Andy Piper:
- ftp://ftp.franken.de/pub/win32/develop/gnuwin32/cygwin/porters/Okhapkin_Sergey/libcrypt.tgz
+ ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/porters/Okhapkin_Sergey/libcrypt.tgz
=item * C<-lgdbm> (C<use GDBM_File>)
-GDBM is available for Cygwin. GDBM's ndbm/dbm compatibility feature
-also makes C<NDBM_File> and C<ODBM_File> possible (although they add
-little extra value).
-
-NOTE: The ndbm/dbm emulations only completely work on NTFS partitions.
+GDBM is available for Cygwin.
=item * C<-ldb> (C<use DB_File>)
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).
+CPAN modules). NO LONGER SUPPORTED!
+
+=item * C<-lutil>
+
+Included with the standard Cygwin netrelease is the inetutils package
+which includes libutil.a.
=back
=item * C<-Duse64bitint>
-I<gcc> supports 64-bit integers. However, several additional long long
-functions are necessary to use them within Perl (I<{strtol,strtoul}l>).
-These are B<not> yet available with Cygwin.
+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.
=item * C<-Duselongdouble>
I<gcc> supports long doubles (12 bytes). However, several additional
long double math functions are necessary to use them within Perl
-(I<{atan2,cos,exp,floor,fmod,frexp,isnan,log,modf,pow,sin,sqrt}l,strtold>).
+(I<{atan2, cos, exp, floor, fmod, frexp, isnan, log, modf, pow, sin, sqrt}l,
+strtold>).
These are B<not> yet available with Cygwin.
=item * C<-Dusethreads>
-POSIX threads are B<not> yet implemented in Cygwin.
+POSIX threads are B<not> yet implemented in Cygwin completely.
=item * C<-Duselargefiles>
Although Win32 supports large files, Cygwin currently uses 32-bit integers
for internal size and position calculations.
+=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.
+
=back
=head2 Suspicious Warnings on Cygwin
C<_LONG_DOUBLE>:
Guessing which symbols your C compiler and preprocessor define...
- try.c:<line#>: parse error
+ try.c:<line#>: missing binary operator
-This failure does not seem to cause any problems.
+This failure does not seem to cause any problems. With older gcc
+versions, "parse error" is reported instead of "missing binary
+operator".
=back
Warnings like these are normal:
- warning: overriding commands for target <file>
- warning: ignoring old commands for target <file>
-
- dllwrap: no export definition file provided
- dllwrap: creating one, but that may not be what you want
+ 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)
+ ...
+ make: [extras.make] Error 1 (ignored)
=head2 ld2 on Cygwin
setting, the additional mode bits are stored as extended file attributes.
On WinNT with the I<ntsec> C<CYGWIN> setting, permissions use the standard
WinNT security descriptors and access control lists. Without one of
-these options, these tests will fail:
+these options, these tests will fail (listing not updated yet):
Failed Test List of failed
------------------------------------
lib/sdbm.t 2
op/stat.t 9, 20 (.tmp not an executable extension)
-=head2 Hard Links on Cygwin
+=head2 NDBM_File and ODBM_File do not work on FAT filesystems
-FAT partitions do not support hard links (whereas NTFS does), in which
-case Cygwin implements link() by copying the file. On remote (network)
-drives Cygwin's stat() always sets C<st_nlink> to 1, so the link count
-for remote directories and files is not available. In either case,
-these tests will fail:
+Do not use NDBM_File or ODBM_File on FAT filesystem. They can be
+built on a FAT filesystem, but many tests will fail:
- Failed Test List of failed
- ------------------------------------
- io/fs.t 4
- op/stat.t 3
+ ../ext/NDBM_File/ndbm.t 13 3328 71 59 83.10% 1-2 4 16-71
+ ../ext/ODBM_File/odbm.t 255 65280 ?? ?? % ??
+ ../lib/AnyDBM_File.t 2 512 12 2 16.67% 1 4
+ ../lib/Memoize/t/errors.t 0 139 11 5 45.45% 7-11
+ ../lib/Memoize/t/tie_ndbm.t 13 3328 4 4 100.00% 1-4
+ run/fresh_perl.t 97 1 1.03% 91
-=head2 Filetime Granularity on Cygwin
+If you intend to run only on FAT (or if using AnyDBM_File on FAT),
+run Configure with the -Ui_ndbm and -Ui_dbm options to prevent
+NDBM_File and ODBM_File being built.
-On FAT partitions the filetime granularity is 2 seconds. The following
-test will fail:
+With NTFS (and CYGWIN=ntsec), there should be no problems even if
+perl was built on FAT.
- Failed Test List of failed
- ------------------------------------
- io/fs.t 18
-
-=head2 Tainting Checks on Cygwin
-
-When Perl is running in taint mode, C<$ENV{PATH}> is considered tainted
-and not used, so DLLs not in the default system directories will not
-be found. While the tests are running you will see warnings popup from
-the system with messages like:
+=head2 fork() failures in io_* tests
- Win9x
- Error Starting Program
- A required .DLL file, CYGWIN1.DLL, was not found
+A fork() failure may result in the following tests failing:
- WinNT
- perl.exe - Unable to Locate DLL
- The dynamic link library cygwin1.dll could not be found in the
- specified path ...
-
-Just click OK and ignore them. When running `C<make test>', 2 popups
-occur. During `C<./perl harness>', 4 popups occur. Also, these tests
-will fail:
-
- Failed Test List of failed
- ------------------------------------
- op/taint.t 1, 3, 31, 37
+ ext/IO/lib/IO/t/io_multihomed.t
+ ext/IO/lib/IO/t/io_sock.t
+ ext/IO/lib/IO/t/io_unix.t
-Alternatively, you can copy F<cygwin1.dll> into the directory where the
-tests run:
-
- cp /bin/cygwin1.dll t
-
-or one of the Windows system directories (although, this is B<not>
-recommended).
-
-=head2 /etc/group on Cygwin
-
-Cygwin does not require F</etc/group>, in which case the F<op/grent.t>
-test will be skipped. The check performed by F<op/grent.t> expects to
-see entries that use the members field, otherwise this test will fail:
-
- Failed Test List of failed
- ------------------------------------
- op/grent.t 1
+See comment on fork in L<Miscellaneous> below.
=head2 Script Portability on Cygwin
=item * Pathnames
-Cygwin pathnames can be separated by forward (F</>) or backward (F<\>)
+Cygwin pathnames can be separated by forward (F</>) or backward (F<\\>)
slashes. They may also begin with drive letters (F<C:>) or Universal
Naming Codes (F<//UNC>). DOS device names (F<aux>, F<con>, F<prn>,
F<com*>, F<lpt?>, F<nul>) are invalid as base filenames. However, they
The Cygwin chroot() implementation has holes (it can not restrict file
access by native Win32 programs).
+Inplace editing C<perl -i> of files doesn't work without doing a backup
+of the file being edited C<perl -i.bak> because of windowish restrictions,
+so Perl adds the C<.bak> automatically if you just use C<perl -i>.
+
+Using fork() after loading multiple dlls may fail with an internal cygwin
+error like the following:
+
+ 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
+
+ 200 [main] perl 377147 sync_with_child: child -395691(0xB8) died before initialization with status code 0x1
+ 1370 [main] perl 377147 sync_with_child: *** child state child loading dlls
+
+Use the rebase utility to resolve the conflicting dll addresses.
+See: http://www.tishler.net/jason/software/rebase/
+and http://sources.redhat.com/ml/cygwin/2002-07/msg00276.html
+
=back
=head1 INSTALL PERL ON CYGWIN
This will install Perl, including I<man> pages.
- make install | tee log.make-install
+ make install 2>&1 | tee log.make-install
NOTE: If C<STDERR> is redirected `C<make install>' will B<not> prompt
you to install I<perl> into F</usr/bin>.
These are the files in the Perl release that contain references to Cygwin.
These very brief notes attempt to explain the reason for all conditional
code. Hopefully, keeping this up to date will allow the Cygwin port to
-be kept as clean as possible.
+be kept as clean as possible (listing not updated yet).
=over 4
=head1 BUGS ON CYGWIN
-When I<make> starts, it warns about overriding commands for F<perlmain.o>.
-
-`C<make clean>' does not remove library F<.def> or F<.exe.stackdump>
-files.
-
-The I<ld2> script contains references to the source directory. You should
-change these to $installbin after `C<make install>'.
-
Support for swapping real and effective user and group IDs is incomplete.
On WinNT Cygwin provides setuid(), seteuid(), setgid() and setegid().
However, additional Cygwin calls for manipulating WinNT access tokens
and security contexts are required.
-When building DLLs, `C<dllwrap --export-all-symbols>' is used to export
-global symbols. It might be better to generate an explicit F<.def> file
-(see F<makedef.pl>). Also, DLLs can now be build with `C<gcc -shared>'.
-
=head1 AUTHORS
Charles Wilson <cwilson@ece.gatech.edu>,
alexander smishlajev <als@turnhere.com>,
Steven Morlock <newspost@morlock.net>,
Sebastien Barre <Sebastien.Barre@utc.fr>,
-Teun Burgers <burgers@ecn.nl>.
+Teun Burgers <burgers@ecn.nl>,
+Gerrit Haase <gh@familiehaase.de>.
=head1 HISTORY
-Last updated: 9 November 2000
+Last updated: 2002-10-07