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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2007-03-22 21:23:21 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2007-03-22 21:23:21 +0000 |
commit | cbf5993c43f49281173f185863577d86bfac6eae (patch) | |
tree | 90737c96cf15b97273a2bdc5950b3cf09f1d94ca /m4/posixver.m4 | |
download | coreutils-tarball-cbf5993c43f49281173f185863577d86bfac6eae.tar.gz |
coreutils-6.9coreutils-6.9
Diffstat (limited to 'm4/posixver.m4')
-rw-r--r-- | m4/posixver.m4 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/m4/posixver.m4 b/m4/posixver.m4 new file mode 100644 index 0000000..f60a094 --- /dev/null +++ b/m4/posixver.m4 @@ -0,0 +1,45 @@ +# posixver.m4 serial 9 +dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_POSIXVER], +[ + AC_LIBOBJ([posixver]) + + AC_REQUIRE([gl_DEFAULT_POSIX2_VERSION]) +]) + +# Set the default level of POSIX conformance at configure-time. +# Build with `./configure DEFAULT_POSIX2_VERSION=199209 ...' to +# support the older version, thus preserving portability with +# scripts that use sort +1, tail +32, etc. +# Note however, that this breaks tools that might run commands +# like `sort +some-file' that conform with the newer standard. +AC_DEFUN([gl_DEFAULT_POSIX2_VERSION], +[ + AC_MSG_CHECKING([for desired default level of POSIX conformance]) + gl_default_posix2_version=none-specified + if test -n "$ac_cv_env_DEFAULT_POSIX2_VERSION_set"; then + gl_default_posix2_version=$ac_cv_env_DEFAULT_POSIX2_VERSION_value + AC_DEFINE_UNQUOTED(DEFAULT_POSIX2_VERSION, + $gl_default_posix2_version, + [Define the default level of POSIX conformance. The value is of + the form YYYYMM, specifying the year and month the standard was + adopted. If not defined here, it defaults to the value of + _POSIX2_VERSION in <unistd.h>. Define to 199209 to default to + POSIX 1003.2-1992, which makes standard programs like `head', + `tail', and `sort' accept obsolete options like `+10' and + `-10'. Define to 200112 to default to POSIX 1003.1-2001, which + makes these standard programs treat leading-`+' operands as + file names and require modern usages like `-n 10' instead of + `-10'. Whether defined here or not, the default can be + overridden at run time via the _POSIX2_VERSION environment + variable.]) + fi + AC_MSG_RESULT($gl_default_posix2_version) + AC_ARG_VAR( + [DEFAULT_POSIX2_VERSION], + [POSIX version to default to; see 'config.hin'.]) +]) |