X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=README.cygwin;h=1a8d0b45533f406a8e4aeb63420c79619abbace2;hb=f4db54055cd36d83622f77949fd6ab7c67198101;hp=eb6c2898819165494ce79188c903b8511cdb4e1d;hpb=ee8c7f5465f003860e2347a2946abacac39bd9b9;p=p5sagit%2Fp5-mst-13.2.git diff --git a/README.cygwin b/README.cygwin index eb6c289..1a8d0b4 100644 --- a/README.cygwin +++ b/README.cygwin @@ -18,7 +18,7 @@ customize the configuration, consider using one of these packages: http://cygutils.netpedia.net/ -=head1 PREREQUISITES +=head1 PREREQUISITES FOR COMPILING PERL ON CYGWIN =head2 Cygwin = GNU+Cygnus+Windows (Don't leave UNIX without it) @@ -27,20 +27,19 @@ platforms. They run thanks to the Cygwin library which provides the UNIX system calls and environment these programs expect. More information about this project can be found at: - http://sourceware.cygnus.com/cygwin/ + http://www.cygwin.com/ A recent net or commercial release of Cygwin is required. -At the time this document was written, Cygwin 1.1.1 was current. +At the time this document was last updated, Cygwin 1.1.5 was current. B At this point, minimal effort has been made to provide compatibility with old (beta) Cygwin releases. The focus has been to provide a high quality release and not worry about working around old -Cygwin bugs. If you wish to use Perl with Cygwin B20.1 or earlier, -consider using perl5.005_03, which is available in source and binary -form at C or on the Cygwin CD. If there -is significant demand, a patch kit can be developed to port back to -earlier Cygwin versions. +bugs. If you wish to use Perl with Cygwin B20.1 or earlier, consider +using perl5.005_03, which is available in source and binary form at +C. If there is significant demand, +a patch kit can be developed to port back to earlier Cygwin versions. =head2 Cygwin Configuration @@ -49,11 +48,11 @@ that Perl builds cleanly. These changes are B required for normal Perl usage. B The binaries that are built will run on all Win32 versions. -They do not depend on your host system (Win9x, WinNT) or your Cygwin -configuration (I, I, binary/text mounts). The only -dependencies come from hard-coded pathnames like C. However, -your host system and Cygwin configuration will affect Perl's runtime -behavior (see L). +They do not depend on your host system (Win9x/WinME, WinNT/Win2K) +or your Cygwin configuration (I, I, binary/text mounts). +The only dependencies come from hard-coded pathnames like C. +However, your host system and Cygwin configuration will affect Perl's +runtime behavior (see L). =over 4 @@ -72,7 +71,7 @@ Configure will B prompt you to install I pages. On WinNT with either the I or I C settings, directory and file permissions may not be set correctly. Since the build process -creates files and directories, to be safe you may want to run a `C' on the entire Perl source tree. Also, it is a well known WinNT "feature" that files created by a login @@ -85,7 +84,7 @@ a UNIX system. =back -=head1 CONFIGURE +=head1 CONFIGURE PERL ON CYGWIN The default options gathered by Configure with the assistance of F will build a Perl that supports dynamic loading @@ -98,7 +97,7 @@ This will run Configure and keep a record: If you are willing to accept all the defaults run Configure with B<-de>. However, several useful customizations are available. -=head2 Strip Binaries +=head2 Stripping Perl Binaries on Cygwin It is possible to strip the EXEs and DLLs created by the build process. The resulting binaries will be significantly smaller. If you want the @@ -113,7 +112,7 @@ prompts you, or you can edit F and uncomment the relevant variables near the end of the file. -=head2 Optional Libraries +=head2 Optional Libraries for Perl on Cygwin Several Perl functions and modules depend on the existence of some optional libraries. Configure will find them if they are @@ -125,7 +124,10 @@ C. =item * C<-lcrypt> -The crypt libraries in GNU libc have been ported to Cygwin. +The crypt package distributed with Cygwin is a Linux compatible 56-bit +DES crypt port by Corinna Vinschen. + +Alternatively, the crypt libraries in GNU libc have been ported to Cygwin. The DES based Ultra Fast Crypt port was done by Alexey Truhan: @@ -144,11 +146,15 @@ GDBM is available for Cygwin. GDBM's ndbm/dbm compatibility feature also makes C and C possible (although they add little extra value). +NOTE: The ndbm/dbm emulations only completely work on NTFS partitions. + =item * C<-ldb> (C) BerkeleyDB is available for Cygwin. Some details can be found in F. +NOTE: The BerkeleyDB library only completely works on NTFS partitions. + =item * C<-lcygipc> (C) A port of SysV IPC is available for Cygwin. @@ -162,7 +168,7 @@ CPAN modules). =back -=head2 Configure-time Options +=head2 Configure-time Options for Perl on Cygwin The F document describes several Configure-time options. Some of these will work with Cygwin, others are not yet possible. Also, some of @@ -199,7 +205,7 @@ These are B yet available with Cygwin. I 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,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 yet available with Cygwin. =item * C<-Dusethreads> @@ -213,24 +219,12 @@ for internal size and position calculations. =back -=head2 Suspicious Warnings +=head2 Suspicious Warnings on Cygwin You may see some messages during Configure that seem suspicious. =over 4 -=item * Whoa There - -Cygwin does not yet implement chroot() functionality, but has a stub -function that returns C. You will see a message when Configure -detects that its guess conflicts with the hint file. - - *** WHOA THERE!!! *** - The recommended value for $d_chroot on this machine was "undef"! - Keep the recommended value? [y] - -You should keep the recommended value. - =item * I I is needed to build dynamic libraries, but it does not exist @@ -259,43 +253,35 @@ closed pipe. You will see the following messages: At least for consistency with WinNT, you should keep the recommended value. -=item * Checking how std your stdio is... - -Configure reports: - - Your stdio doesn't appear very std. - -This is correct. - =item * Compiler/Preprocessor defines The following error occurs because of the Cygwin C<#define> of C<_LONG_DOUBLE>: Guessing which symbols your C compiler and preprocessor define... - try.c:3847: parse error + try.c:: parse error This failure does not seem to cause any problems. =back -=head1 MAKE +=head1 MAKE ON CYGWIN Simply run I and wait: make 2>&1 | tee log.make -=head2 Warnings +=head2 Warnings on Cygwin Warnings like these are normal: warning: overriding commands for target warning: ignoring old commands for target - Warning: no export definition file provided - dllwrap will create one, but may not be what you want + dllwrap: no export definition file provided + dllwrap: creating one, but that may not be what you want -=head2 ld2 +=head2 ld2 on Cygwin During `C', I will be created and installed in your $installbin directory (where you said to put public executables). It does not @@ -307,7 +293,7 @@ is not the case `C' will fail at some point. If this happens, just manually copy I from the source directory to somewhere in your C. -=head1 TEST +=head1 TEST ON CYGWIN There are two steps to running the test suite: @@ -321,10 +307,10 @@ running as `C<./perl harness>'. Test results vary depending on your host system and your Cygwin configuration. If a test can pass in some Cygwin setup, it is always attempted and explainable test failures are documented. It is possible -that Perl will pass all the tests, but it is more likely that some tests -will fail for one of these reasons. +for Perl to pass all the tests, but it is more likely that some tests +will fail for one of the reasons listed below. -=head2 File Permissions +=head2 File Permissions on Cygwin UNIX file permissions are based on sets of mode bits for {read,write,execute} for each {user,group,other}. By default Cygwin @@ -350,17 +336,20 @@ these options, these tests will fail: lib/sdbm.t 2 op/stat.t 9, 20 (.tmp not an executable extension) -=head2 Hard Links +=head2 Hard Links on Cygwin FAT partitions do not support hard links (whereas NTFS does), in which -case Cygwin implements link() by copying the file. These tests will fail: +case Cygwin implements link() by copying the file. On remote (network) +drives Cygwin's stat() always sets C to 1, so the link count +for remote directories and files is not available. In either case, +these tests will fail: Failed Test List of failed ------------------------------------ io/fs.t 4 op/stat.t 3 -=head2 Filetime Granularity +=head2 Filetime Granularity on Cygwin On FAT partitions the filetime granularity is 2 seconds. The following test will fail: @@ -369,7 +358,7 @@ test will fail: ------------------------------------ io/fs.t 18 -=head2 Tainting Checks +=head2 Tainting Checks on Cygwin When Perl is running in taint mode, C<$ENV{PATH}> is considered tainted and not used, so DLLs not in the default system directories will not @@ -381,7 +370,7 @@ the system with messages like: A required .DLL file, CYGWIN1.DLL, was not found WinNT - perl.exe or sh.exe - Unable to Locate DLL + perl.exe - Unable to Locate DLL The dynamic link library cygwin1.dll could not be found in the specified path ... @@ -396,12 +385,12 @@ will fail: Alternatively, you can copy F into the directory where the tests run: - cp `type -p cygwin1.dll` t + cp /bin/cygwin1.dll t or one of the Windows system directories (although, this is B recommended). -=head2 /etc/group +=head2 /etc/group on Cygwin Cygwin does not require F, in which case the F test will be skipped. The check performed by F expects to @@ -411,7 +400,7 @@ see entries that use the members field, otherwise this test will fail: ------------------------------------ op/grent.t 1 -=head2 Script Portability +=head2 Script Portability on Cygwin Cygwin does an outstanding job of providing UNIX-like semantics on top of Win32 systems. However, in addition to the items noted above, there are @@ -431,7 +420,9 @@ printable characters except these: : * ? " < > | -File names are case insensitive, but case preserving. +File names are case insensitive, but case preserving. A pathname that +contains a backslash or drive letter is a Win32 pathname (and not subject +to the translations applied to POSIX style pathnames). =item * Text/Binary @@ -450,13 +441,13 @@ The text/binary issue is covered at length in the Cygwin documentation. =item * F<.exe> -The Cygwin stat() makes the F<.exe> extension transparent by looking for -F when you ask for F (unless a F also exists). Cygwin -does not require a F<.exe> extension, but I adds it automatically -when building a program. However, when accessing an executable as a -normal file (e.g., I in a makefile) the F<.exe> is not transparent. -The I included with Cygwin automatically appends a F<.exe> -when necessary. +The Cygwin stat(), lstat() and readlink() functions make the F<.exe> +extension transparent by looking for F when you ask for F +(unless a F also exists). Cygwin does not require a F<.exe> +extension, but I adds it automatically when building a program. +However, when accessing an executable as a normal file (e.g., I +in a makefile) the F<.exe> is not transparent. The I included +with Cygwin automatically appends a F<.exe> when necessary. =item * chown() @@ -470,9 +461,12 @@ returns C. Win9x can not rename() an open file (although WinNT can). +The Cygwin chroot() implementation has holes (it can not restrict file +access by native Win32 programs). + =back -=head1 INSTALL +=head1 INSTALL PERL ON CYGWIN This will install Perl, including I pages. @@ -487,7 +481,7 @@ are not, you must have write access to the directories in question. Information on installing the Perl documentation in HTML format can be found in the F document. -=head1 MANIFEST +=head1 MANIFEST ON CYGWIN 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 @@ -498,11 +492,11 @@ be kept as clean as possible. =item Documentation - INSTALL README.cygwin - Changes Changes5.005 Changes5.004 - AUTHORS MAINTAIN MANIFEST README.win32 - pod/perl.pod pod/perlfaq3.pod pod/perlhist.pod pod/perlmodlib.pod - pod/perlport.pod pod/perltoc.pod pod/perldelta.pod pod/perl5004delta.pod + INSTALL README.cygwin README.win32 MANIFEST + 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 =item Build, Configure, Make, Install @@ -524,6 +518,7 @@ be kept as clean as possible. =item Tests t/io/tell.t - binmode + t/lib/b.t - ignore Cwd from os_extras t/lib/glob-basic.t - Win32 directory list access differs from read mode t/op/magic.t - $^X/symlink WORKAROUND, s/.exe// t/op/stat.t - no /dev, skip Win32 ftCreationTime quirk @@ -539,9 +534,7 @@ be kept as clean as possible. perl.h - binmode doio.c - win9x can not rename a file when it is open pp_sys.c - do not define h_errno, pp_system with spawn - mg.c - environ WORKAROUND - unixish.h - environ WORKAROUND - util.c - environ WORKAROUND + util.c - use setenv =item Compiled Module Source @@ -558,27 +551,37 @@ be kept as clean as possible. - require MM_Cygwin.pm lib/ExtUtils/MM_Cygwin.pm - canonpath, cflags, manifypods, perl_archive + lib/File/Find.pm - on remote drives stat() always sets st_nlink to 1 lib/File/Spec/Unix.pm - preserve //unc + lib/File/Temp.pm - no directory sticky bit lib/perl5db.pl - use stdin not /dev/tty - utils/perlcc.PL - DynaLoader.a in compile, -DUSEIMPORTLIB utils/perldoc.PL - version comment =back -=head1 BUGS +=head1 BUGS ON CYGWIN When I starts, it warns about overriding commands for F. -`C' does not remove library F<.def> and F<.exe.stackdump> +`C' does not remove library F<.def> or F<.exe.stackdump> files. The I script contains references to the source directory. You should change these to $installbin after `C'. +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' is used to export +global symbols. It might be better to generate an explicit F<.def> file +(see F). Also, DLLs can now be build with `C'. + =head1 AUTHORS Charles Wilson , -Eric Fifer , +Eric Fifer , alexander smishlajev , Steven Morlock , Sebastien Barre , @@ -586,4 +589,4 @@ Teun Burgers . =head1 HISTORY -Last updated: 5 May 2000 +Last updated: 9 November 2000