{
"mode": "man",
"parameter": "perlcygwin",
"section": "1",
"url": "https://www.chedong.com/phpMan.php/man/perlcygwin/1/json",
"generated": "2026-10-04T14:00:53Z",
"synopsis": "This document will help you configure, make, test and install Perl on Cygwin. This document\nalso describes features of Cygwin that will affect how Perl behaves at runtime.\nNOTE: There are pre-built Perl packages available for Cygwin and a version of Perl is\nprovided in the normal Cygwin install. If you do not need to customize the configuration,\nconsider using one of those packages.",
"sections": {
"NAME": {
"content": "perlcygwin - Perl for Cygwin\n",
"subsections": []
},
"SYNOPSIS": {
"content": "This document will help you configure, make, test and install Perl on Cygwin. This document\nalso describes features of Cygwin that will affect how Perl behaves at runtime.\n\nNOTE: There are pre-built Perl packages available for Cygwin and a version of Perl is\nprovided in the normal Cygwin install. If you do not need to customize the configuration,\nconsider using one of those packages.\n",
"subsections": []
},
"PREREQUISITES FOR COMPILING PERL ON CYGWIN": {
"content": "",
"subsections": [
{
"name": "Cygwin = GNU+Cygnus+Windows (Don't leave UNIX without it)",
"content": "The Cygwin tools are ports of the popular GNU development tools for Win32 platforms. They\nrun thanks to the Cygwin library which provides the UNIX system calls and environment these\nprograms expect. More information about this project can be found at:\n\n\n\nA recent net or commercial release of Cygwin is required.\n\nAt the time this document was last updated, Cygwin 3.0.7 was current.\n"
},
{
"name": "Cygwin Configuration",
"content": "While building Perl some changes may be necessary to your Cygwin setup so that Perl builds\ncleanly. These changes are not required for normal Perl usage.\n\nNOTE: The binaries that are built will run on all Win32 versions. They do not depend on your\nhost system or your Cygwin configuration (binary/text mounts, cygserver). The only\ndependencies come from hard-coded pathnames like /usr/local. However, your host system and\nCygwin configuration will affect Perl's runtime behavior (see \"TEST\").\n\n• \"PATH\"\n\nSet the \"PATH\" environment variable so that Configure finds the Cygwin versions of\nprograms. Any not-needed Windows directories should be removed or moved to the end of\nyour \"PATH\".\n\n• nroff\n\nIf you do not have nroff (which is part of the groff package), Configure will not prompt\nyou to install man pages.\n"
}
]
},
"CONFIGURE PERL ON CYGWIN": {
"content": "The default options gathered by Configure with the assistance of hints/cygwin.sh will build a\nPerl that supports dynamic loading (which requires a shared cygperl516.dll).\n\nThis will run Configure and keep a record:\n\n./Configure 2>&1 | tee log.configure\n\nIf you are willing to accept all the defaults run Configure with -de. However, several\nuseful customizations are available.\n",
"subsections": [
{
"name": "Stripping Perl Binaries on Cygwin",
"content": "It is possible to strip the EXEs and DLLs created by the build process. The resulting\nbinaries will be significantly smaller. If you want the binaries to be stripped, you can\neither add a -s option when Configure prompts you,\n\nAny additional ld flags (NOT including libraries)? [none] -s\nAny special flags to pass to g++ to create a dynamically loaded\nlibrary?\n[none] -s\nAny special flags to pass to gcc to use dynamic linking? [none] -s\n\nor you can edit hints/cygwin.sh and uncomment the relevant variables near the end of the\nfile.\n"
},
{
"name": "Optional Libraries for Perl on Cygwin",
"content": "Several Perl functions and modules depend on the existence of some optional libraries.\nConfigure will find them if they are installed in one of the directories listed as being used\nfor library searches. Pre-built packages for most of these are available from the Cygwin\ninstaller.\n\n• \"-lcrypt\"\n\nThe crypt package distributed with Cygwin is a Linux compatible 56-bit DES crypt port by\nCorinna Vinschen.\n\nAlternatively, the crypt libraries in GNU libc have been ported to Cygwin.\n\nAs of libcrypt 1.3 (March 2016), you will need to install the libcrypt-devel package for\nConfigure to detect crypt().\n\n• \"-lgdbmcompat\" (\"use GDBMFile\")\n\nGDBM is available for Cygwin.\n\nNOTE: The GDBM library only works on NTFS partitions.\n\n• \"-ldb\" (\"use DBFile\")\n\nBerkeleyDB is available for Cygwin.\n\nNOTE: The BerkeleyDB library only completely works on NTFS partitions.\n\n• \"cygserver\" (\"use IPC::SysV\")\n\nA port of SysV IPC is available for Cygwin.\n\nNOTE: This has not been extensively tested. In particular, \"dsemctlsemun\" is undefined\nbecause it fails a Configure test. It also creates a compile time dependency because\nperl.h includes and (which will be required in the future when\ncompiling CPAN modules). CURRENTLY NOT SUPPORTED!\n\n• \"-lutil\"\n\nIncluded with the standard Cygwin netrelease is the inetutils package which includes\nlibutil.a.\n"
},
{
"name": "Configure-time Options for Perl on Cygwin",
"content": "The INSTALL document describes several Configure-time options. Some of these will work with\nCygwin, others are not yet possible. Also, some of these are experimental. You can either\nselect an option when Configure prompts you or you can define (undefine) symbols on the\ncommand line.\n\n• \"-Uusedl\"\n\nUndefining this symbol forces Perl to be compiled statically.\n\n• \"-Dusemymalloc\"\n\nBy default Perl does not use the malloc() included with the Perl source, because it was\nslower and not entirely thread-safe. If you want to force Perl to build with the old\n-Dusemymalloc define this.\n\n• \"-Uuseperlio\"\n\nUndefining this symbol disables the PerlIO abstraction. PerlIO is now the default; it is\nnot recommended to disable PerlIO.\n\n• \"-Dusemultiplicity\"\n\nMultiplicity is required when embedding Perl in a C program and using more than one\ninterpreter instance. This is only required when you build a not-threaded perl with\n\"-Uuseithreads\".\n\n• \"-Uuse64bitint\"\n\nBy default Perl uses 64 bit integers. If you want to use smaller 32 bit integers, define\nthis symbol.\n\n• \"-Duselongdouble\"\n\ngcc supports long doubles (12 bytes). However, several additional long double math\nfunctions are necessary to use them within Perl ({atan2, cos, exp, floor, fmod, frexp,\nisnan, log, modf, pow, sin, sqrt}l, strtold). These are not yet available with newlib,\nthe Cygwin libc.\n\n• \"-Uuseithreads\"\n\nDefine this symbol if you want not-threaded faster perl.\n\n• \"-Duselargefiles\"\n\nCygwin uses 64-bit integers for internal size and position calculations, this will be\ncorrectly detected and defined by Configure.\n\n• \"-Dmksymlinks\"\n\nUse this to build perl outside of the source tree. Details can be found in the INSTALL\ndocument. This is the recommended way to build perl from sources.\n"
}
]
},
"MAKE ON CYGWIN": {
"content": "Simply run make and wait:\n\nmake -jn 2>&1 | tee log.make\n\nwhere n is the maximum number of simultaneous compilations you want; omitting this parameter\nis the same as specifying \"-j1\".\n",
"subsections": []
},
"TEST ON CYGWIN": {
"content": "There are two steps to running the test suite:\n\nmake test 2>&1 | tee log.make-test\n\ncd t; ./perl harness 2>&1 | tee ../log.harness\n\nThe same tests are run both times, but more information is provided when running as \"./perl\nharness\", and you can run the tests in parallel by instead specifying\n\ncd t; TESTJOBS=n ./perl harness 2>&1 | tee ../log.harness\n\nwhere n is the maximum number of tests to run simulataneously.\n\nTest results vary depending on your host system and your Cygwin configuration. If a test can\npass in some Cygwin setup, it is always attempted and explainable test failures are\ndocumented. It is possible for Perl to pass all the tests, but it is more likely that some\ntests will fail for one of the reasons listed below.\n",
"subsections": [
{
"name": "File Permissions on Cygwin",
"content": "UNIX file permissions are based on sets of mode bits for {read,write,execute} for each\n{user,group,other}. By default Cygwin only tracks the Win32 read-only attribute represented\nas the UNIX file user write bit (files are always readable, files are executable if they have\na .{com,bat,exe} extension or begin with \"#!\", directories are always readable and\nexecutable). On WinNT with the ntea \"CYGWIN\" setting, the additional mode bits are stored as\nextended file attributes. On WinNT with the default ntsec \"CYGWIN\" setting, permissions use\nthe standard WinNT security descriptors and access control lists. Without one of these\noptions, these tests will fail (listing not updated yet):\n\nFailed Test List of failed\n------------------------------------\nio/fs.t 5, 7, 9-10\nlib/anydbm.t 2\nlib/db-btree.t 20\nlib/db-hash.t 16\nlib/db-recno.t 18\nlib/gdbm.t 2\nlib/ndbm.t 2\nlib/odbm.t 2\nlib/sdbm.t 2\nop/stat.t 9, 20 (.tmp not an executable extension)\n"
},
{
"name": "NDBM_File and ODBM_File do not work on FAT filesystems",
"content": "Do not use NDBMFile or ODBMFile on FAT filesystem. They can be built on a FAT filesystem,\nbut many tests will fail:\n\n../ext/NDBMFile/ndbm.t 13 3328 71 59 83.10% 1-2 4 16-71\n../ext/ODBMFile/odbm.t 255 65280 ?? ?? % ??\n../lib/AnyDBMFile.t 2 512 12 2 16.67% 1 4\n../lib/Memoize/t/errors.t 0 139 11 5 45.45% 7-11\n../lib/Memoize/t/tiendbm.t 13 3328 4 4 100.00% 1-4\nrun/freshperl.t 97 1 1.03% 91\n\nIf you intend to run only on FAT (or if using AnyDBMFile on FAT), run Configure with the\n-Uindbm and -Uidbm options to prevent NDBMFile and ODBMFile being built.\n\nWith NTFS (and no CYGWIN=nontsec), there should be no problems even if perl was built on FAT.\n\nfork() failures in io* tests\nA fork() failure may result in the following tests failing:\n\next/IO/lib/IO/t/iomultihomed.t\next/IO/lib/IO/t/iosock.t\next/IO/lib/IO/t/iounix.t\n\nSee comment on fork in \"Miscellaneous\" below.\n"
}
]
},
"Specific features of the Cygwin port": {
"content": "",
"subsections": [
{
"name": "Script Portability on Cygwin",
"content": "Cygwin does an outstanding job of providing UNIX-like semantics on top of Win32 systems.\nHowever, in addition to the items noted above, there are some differences that you should\nknow about. This is a very brief guide to portability, more information can be found in the\nCygwin documentation.\n\n• Pathnames\n\nCygwin pathnames are separated by forward (/) slashes, Universal Naming Codes (//UNC) are\nalso supported. Since cygwin-1.7 non-POSIX pathnames should not be used. Names may\ncontain all printable characters.\n\nFile names are case insensitive, but case preserving. A pathname that contains a\nbackslash or drive letter is a Win32 pathname, and not subject to the translations\napplied to POSIX style pathnames, but cygwin will warn you, so better convert them to\nPOSIX.\n\nFor conversion we have Cygwin::wintoposixpath() and Cygwin::posixtowinpath().\n\nSince cygwin-1.7 pathnames are UTF-8 encoded.\n\n• Text/Binary\n\nSince cygwin-1.7 textmounts are deprecated and strongly discouraged.\n\nWhen a file is opened it is in either text or binary mode. In text mode a file is\nsubject to CR/LF/Ctrl-Z translations. With Cygwin, the default mode for an open() is\ndetermined by the mode of the mount that underlies the file. See \"Cygwin::isbinmount\"().\nPerl provides a binmode() function to set binary mode on files that otherwise would be\ntreated as text. sysopen() with the \"OTEXT\" flag sets text mode on files that otherwise\nwould be treated as binary:\n\nsysopen(FOO, \"bar\", OWRONLY|OCREAT|OTEXT)\n\nlseek(), tell() and sysseek() only work with files opened in binary mode.\n\nThe text/binary issue is covered at length in the Cygwin documentation.\n\n• PerlIO\n\nPerlIO overrides the default Cygwin Text/Binary behaviour. A file will always be treated\nas binary, regardless of the mode of the mount it lives on, just like it is in UNIX. So\nCR/LF translation needs to be requested in either the open() call like this:\n\nopen(FH, \">:crlf\", \"out.txt\");\n\nwhich will do conversion from LF to CR/LF on the output, or in the environment settings\n(add this to your .bashrc):\n\nexport PERLIO=crlf\n\nwhich will pull in the crlf PerlIO layer which does LF -> CRLF conversion on every output\ngenerated by perl.\n\n• .exe\n\nThe Cygwin stat(), lstat() and readlink() functions make the .exe extension transparent\nby looking for foo.exe when you ask for foo (unless a foo also exists). Cygwin does not\nrequire a .exe extension, but gcc adds it automatically when building a program.\nHowever, when accessing an executable as a normal file (e.g., cp in a makefile) the .exe\nis not transparent. The install program included with Cygwin automatically appends a\n.exe when necessary.\n\n• Cygwin vs. Windows process ids\n\nCygwin processes have their own pid, which is different from the underlying windows pid.\nMost posix compliant Proc functions expect the cygwin pid, but several Win32::Process\nfunctions expect the winpid. E.g. $$ is the cygwin pid of /usr/bin/perl, which is not the\nwinpid. Use Cygwin::pidtowinpid() and Cygwin::winpidtopid() to translate between\nthem.\n\n• Cygwin vs. Windows errors\n\nUnder Cygwin, $^E is the same as $!. When using Win32 API Functions, use\nWin32::GetLastError() to get the last Windows error.\n\n• rebase errors on fork or system\n\nUsing fork() or system() out to another perl after loading multiple dlls may result on a\nDLL baseaddress conflict. The internal cygwin error looks like like the following:\n\n0 [main] perl 8916 childinfofork::abort: data segment start:\nparent (0xC1A000) != child(0xA6A000)\n\nor:\n\n183 [main] perl 3588 C:\\cygwin\\bin\\perl.exe: * fatal error -\nunable to remap C:\\cygwin\\bin\\cygsvnsubr-1-0.dll to same address\nas parent(0x6FB30000) != 0x6FE60000 46 [main] perl 3488 fork: child\n3588 - died waiting for dll loading, errno11\n\nSee It helps if not too\nmany DLLs are loaded in memory so the available address space is larger, e.g. stopping\nthe MS Internet Explorer might help.\n\n+Use the rebase utilities to resolve the conflicting dll addresses. The rebase package\nis included in the Cygwin setup. Use setup.exe from to\ninstall it.\n\n1. kill all perl processes and run\n\"> or\n\n2. kill all cygwin processes and services, and run setup.exe.\n\n• Miscellaneous\n\nFile locking using the \"FGETLK\" command to fcntl() is a stub that returns \"ENOSYS\".\n\nThe Cygwin chroot() implementation has holes (it can not restrict file access by native\nWin32 programs).\n\nInplace editing \"perl -i\" of files doesn't work without doing a backup of the file being\nedited \"perl -i.bak\" because of windowish restrictions, therefore Perl adds the suffix\n\".bak\" automatically if you use \"perl -i\" without specifying a backup extension.\n"
},
{
"name": "Prebuilt methods:",
"content": "\"Cwd::cwd\"\nReturns the current working directory.\n\n\"Cygwin::pidtowinpid\"\nTranslates a cygwin pid to the corresponding Windows pid (which may or may not be the\nsame).\n\n\"Cygwin::winpidtopid\"\nTranslates a Windows pid to the corresponding cygwin pid (if any).\n\n\"Cygwin::wintoposixpath\"\nTranslates a Windows path to the corresponding cygwin path respecting the current mount\npoints. With a second non-null argument returns an absolute path. Double-byte characters\nwill not be translated.\n\n\"Cygwin::posixtowinpath\"\nTranslates a cygwin path to the corresponding cygwin path respecting the current mount\npoints. With a second non-null argument returns an absolute path. Double-byte characters\nwill not be translated.\n\nCygwin::mounttable()\nReturns an array of [mntdir, mntfsname, mnttype, mntopts].\n\nperl -e 'for $i (Cygwin::mounttable) {print join(\" \",@$i),\"\\n\";}'\n/bin c:\\cygwin\\bin system binmode,cygexec\n/usr/bin c:\\cygwin\\bin system binmode\n/usr/lib c:\\cygwin\\lib system binmode\n/ c:\\cygwin system binmode\n/cygdrive/c c: system binmode,noumount\n/cygdrive/d d: system binmode,noumount\n/cygdrive/e e: system binmode,noumount\n\n\"Cygwin::mountflags\"\nReturns the mount type and flags for a specified mount point. A comma-separated string\nof mntent->mnttype (always \"system\" or \"user\"), then the mntent->mntopts, where the\nfirst is always \"binmode\" or \"textmode\".\n\nsystem|user,binmode|textmode,exec,cygexec,cygdrive,mixed,\nnotexec,managed,nosuid,devfs,proc,noumount\n\nIf the argument is \"/cygdrive\", then just the volume mount settings, and the cygdrive\nmount prefix are returned.\n\nUser mounts override system mounts.\n\n$ perl -e 'print Cygwin::mountflags \"/usr/bin\"'\nsystem,binmode,cygexec\n$ perl -e 'print Cygwin::mountflags \"/cygdrive\"'\nbinmode,cygdrive,/cygdrive\n\n\"Cygwin::isbinmount\"\nReturns true if the given cygwin path is binary mounted, false if the path is mounted in\ntextmode.\n\n\"Cygwin::syncwinenv\"\nCygwin does not initialize all original Win32 environment variables. See the bottom of\nthis page for \"Restricted Win32\nenvironment\".\n\nCertain Win32 programs called from cygwin programs might need some environment variable,\nsuch as e.g. ADODB needs %COMMONPROGRAMFILES%. Call Cygwin::syncwinenv() to copy all\nWin32 environment variables to your process and note that cygwin will warn on every\nencounter of non-POSIX paths.\n"
}
]
},
"INSTALL PERL ON CYGWIN": {
"content": "This will install Perl, including man pages.\n\nmake install 2>&1 | tee log.make-install\n\nNOTE: If \"STDERR\" is redirected \"make install\" will not prompt you to install perl into\n/usr/bin.\n\nYou may need to be Administrator to run \"make install\". If you are not, you must have write\naccess to the directories in question.\n\nInformation on installing the Perl documentation in HTML format can be found in the INSTALL\ndocument.\n",
"subsections": []
},
"MANIFEST ON CYGWIN": {
"content": "These are the files in the Perl release that contain references to Cygwin. These very brief\nnotes attempt to explain the reason for all conditional code. Hopefully, keeping this up to\ndate will allow the Cygwin port to be kept as clean as possible.\n\nDocumentation\nINSTALL README.cygwin README.win32 MANIFEST\npod/perl.pod pod/perlport.pod pod/perlfaq3.pod\npod/perldelta.pod pod/perl5004delta.pod pod/perl56delta.pod\npod/perl561delta.pod pod/perl570delta.pod pod/perl572delta.pod\npod/perl573delta.pod pod/perl58delta.pod pod/perl581delta.pod\npod/perl590delta.pod pod/perlhist.pod pod/perlmodlib.pod\npod/perltoc.pod Porting/Glossary pod/perlgit.pod\nPorting/updateAUTHORS.pl\ndist/Cwd/Changes ext/Compress-Raw-Zlib/Changes\ndist/Time-HiRes/Changes\next/Compress-Raw-Zlib/README ext/Compress-Zlib/Changes\next/DBFile/Changes ext/Encode/Changes ext/Sys-Syslog/Changes\next/Win32API-File/Changes\nlib/ExtUtils/CBuilder/Changes lib/ExtUtils/Changes\nlib/ExtUtils/NOTES lib/ExtUtils/PATCHING lib/ExtUtils/README\nlib/Net/Ping/Changes lib/Test/Harness/Changes\nlib/Term/ANSIColor/ChangeLog lib/Term/ANSIColor/README\n\nBuild, Configure, Make, Install\ncygwin/Makefile.SHs\next/IPC/SysV/hints/cygwin.pl\next/NDBMFile/hints/cygwin.pl\next/ODBMFile/hints/cygwin.pl\nhints/cygwin.sh\nConfigure - help finding hints from uname,\nshared libperl required for dynamic loading\nMakefile.SH Cross/Makefile-cross-SH\n- linklibperl\nPorting/patchls - cygwin in port list\ninstallman - man pages with :: translated to .\ninstallperl - install dll, install to 'pods'\nmakedepend.SH - uwinfix\nregenlib.pl - file permissions\n\nplan9/mkfile\nvms/descripmms.template\nwin32/Makefile\n\nTests\nt/io/fs.t - no file mode checks if not ntsec\nskip rename() check when not\ncheckcase:relaxed\nt/io/tell.t - binmode\nt/lib/cygwin.t - builtin cygwin function tests\nt/op/groups.t - basegroup has ID = 0\nt/op/magic.t - $^X/symlink WORKAROUND, s/.exe//\nt/op/stat.t - no /dev, skip Win32 ftCreationTime quirk\n(cache manager sometimes preserves ctime of\nfile previously created and deleted), no -u\n(setuid)\nt/op/taint.t - can't use empty path under Cygwin Perl\nt/op/time.t - no tzset()\n\nCompiled Perl Source\nEXTERN.h - declspec(dllimport)\nXSUB.h - declspec(dllexport)\ncygwin/cygwin.c - osextras (getcwd, spawn, and several\nCygwin:: functions)\nperl.c - osextras, -i.bak\nperl.h - binmode\ndoio.c - win9x can not rename a file when it is open\nppsys.c - do not define herrno, init\npwentstruct.pwcomment\nutil.c - use setenv\nutil.h - PERLFILEISABSOLUTE macro\npp.c - Comment about Posix vs IEEE math under\nCygwin\nperlio.c - CR/LF mode\nperliol.c - Comment about EXTCONST under Cygwin\n\nCompiled Module Source\next/Compress-Raw-Zlib/Makefile.PL\n- Can't install via CPAN shell under Cygwin\next/Compress-Raw-Zlib/zlib-src/zutil.h\n- Cygwin is Unix-like and has vsnprintf\next/Errno/Errnopm.PL - Special handling for Win32 Perl under\nCygwin\next/POSIX/POSIX.xs - tzname defined externally\next/SDBMFile/sdbm/pair.c\n- EXTCONST needs to be redefined from\nEXTERN.h\next/SDBMFile/sdbm/sdbm.c\n- binary open\next/Sys/Syslog/Syslog.xs\n- Cygwin has syslog.h\next/Sys/Syslog/win32/compile.pl\n- Convert paths to Windows paths\next/Time-HiRes/HiRes.xs\n- Various timers not available\next/Time-HiRes/Makefile.PL\n- Find w32api/windows.h\next/Win32/Makefile.PL - Use various libraries under Cygwin\next/Win32/Win32.xs - Child dir and child env under Cygwin\next/Win32API-File/File.xs\n- openosfhandle not implemented under\nCygwin\next/Win32CORE/Win32CORE.c\n- declspec(dllexport)\n\nPerl Modules/Scripts\next/B/t/OptreeCheck.pm - Comment about stderr/stdout order under\nCygwin\next/Digest-SHA/bin/shasum\n- Use binary mode under Cygwin\next/Sys/Syslog/win32/Win32.pm\n- Convert paths to Windows paths\next/Time-HiRes/HiRes.pm\n- Comment about various timers not available\next/Win32API-File/File.pm\n- openosfhandle not implemented under\nCygwin\next/Win32CORE/Win32CORE.pm\n- History of Win32CORE under Cygwin\nlib/Cwd.pm - hook to internal Cwd::cwd\nlib/ExtUtils/CBuilder/Platform/cygwin.pm\n- use gcc for ld, and link to libperl.dll.a\nlib/ExtUtils/CBuilder.pm\n- Cygwin is Unix-like\nlib/ExtUtils/Install.pm - Install and rename issues under Cygwin\nlib/ExtUtils/MM.pm - OS classifications\nlib/ExtUtils/MMAny.pm - Example for Cygwin\nlib/ExtUtils/MakeMaker.pm\n- require MMCygwin.pm\nlib/ExtUtils/MMCygwin.pm\n- canonpath, cflags, manifypods, perlarchive\nlib/File/Fetch.pm - Comment about quotes using a Cygwin example\nlib/File/Find.pm - on remote drives stat() always sets\nstnlink to 1\nlib/File/Spec/Cygwin.pm - casetolerant\nlib/File/Spec/Unix.pm - preserve //unc\nlib/File/Spec/Win32.pm - References a message on cygwin.com\nlib/File/Spec.pm - Pulls in lib/File/Spec/Cygwin.pm\nlib/File/Temp.pm - no directory sticky bit\nlib/Module/CoreList.pm - List of all module files and versions\nlib/Net/Domain.pm - No domainname command under Cygwin\nlib/Net/Netrc.pm - Bypass using stat() under Cygwin\nlib/Net/Ping.pm - ECONREFUSED is EAGAIN under Cygwin\nlib/Pod/Find.pm - Set 'pods' dir\nlib/Pod/Perldoc/ToMan.pm - '-c' switch for pod2man\nlib/Pod/Perldoc.pm - Use 'less' pager, and use .exe extension\nlib/Term/ANSIColor.pm - Cygwin terminal info\nlib/perl5db.pl - use stdin not /dev/tty\nutils/perlbug.PL - Add CYGWIN environment variable to report\n\nPerl Module Tests\ndist/Cwd/t/cwd.t\next/Compress-Zlib/t/14gzopen.t\next/DBFile/t/db-btree.t\next/DBFile/t/db-hash.t\next/DBFile/t/db-recno.t\next/DynaLoader/t/DynaLoader.t\next/File-Glob/t/basic.t\next/GDBMFile/t/gdbm.t\next/POSIX/t/sysconf.t\next/POSIX/t/time.t\next/SDBMFile/t/sdbm.t\next/Sys/Syslog/t/syslog.t\next/Time-HiRes/t/HiRes.t\next/Win32/t/Unicode.t\next/Win32API-File/t/file.t\next/Win32CORE/t/win32core.t\nlib/AnyDBMFile.t\nlib/Archive/Extract/t/01Archive-Extract.t\nlib/Archive/Tar/t/02methods.t\nlib/ExtUtils/t/Embed.t\nlib/ExtUtils/t/eucommand.t\nlib/ExtUtils/t/MMCygwin.t\nlib/ExtUtils/t/MMUnix.t\nlib/File/Compare.t\nlib/File/Copy.t\nlib/File/Find/t/find.t\nlib/File/Path.t\nlib/File/Spec/t/crossplatform.t\nlib/File/Spec/t/Spec.t\nlib/Net/hostent.t\nlib/Net/Ping/t/110icmpinst.t\nlib/Net/Ping/t/500pingicmp.t\nlib/Net/t/netrc.t\nlib/Pod/Simple/t/perlcyg.pod\nlib/Pod/Simple/t/perlcygo.txt\nlib/Pod/Simple/t/perlfaq.pod\nlib/Pod/Simple/t/perlfaqo.txt\nlib/User/grent.t\nlib/User/pwent.t\n",
"subsections": []
},
"BUGS ON CYGWIN": {
"content": "Support for swapping real and effective user and group IDs is incomplete. On WinNT Cygwin\nprovides setuid(), seteuid(), setgid() and setegid(). However, additional Cygwin calls for\nmanipulating WinNT access tokens and security contexts are required.\n",
"subsections": []
},
"AUTHORS": {
"content": "Charles Wilson , Eric Fifer , alexander smishlajev\n, Steven Morlock , Sebastien Barre\n, Teun Burgers , Gerrit P. Haase\n, Reini Urban , Jan Dubois , Jerry\nD. Hedden .\n",
"subsections": []
},
"HISTORY": {
"content": "Last updated: 2019-11-14\n\nperl v5.38.2 2026-08-18 PERLCYGWIN(1)",
"subsections": []
}
},
"summary": "perlcygwin - Perl for Cygwin",
"flags": [],
"examples": [],
"see_also": []
}