Mercurial > gnulib
view m4/putenv.m4 @ 40153:878ddb87671b
mountlist: Merge two .m4 files.
* m4/mountlist.m4 (gl_MOUNTLIST): Inline gl_LIST_MOUNTED_FILE_SYSTEMS.
(AC_FUNC_GETMNTENT): Move to here, from m4/ls-mntd-fs.m4.
* m4/ls-mntd-fs.m4: Remove file.
* modules/mountlist (Files): Remove m4/ls-mntd-fs.m4.
author | Bruno Haible <bruno@clisp.org> |
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date | Sun, 27 Jan 2019 11:45:28 +0100 |
parents | b06060465f09 |
children |
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# putenv.m4 serial 22 dnl Copyright (C) 2002-2019 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. dnl From Jim Meyering. dnl dnl Check whether putenv ("FOO") removes FOO from the environment. dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that. AC_DEFUN([gl_FUNC_PUTENV], [ AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([for putenv compatible with GNU and SVID], [gl_cv_func_svid_putenv], [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[ /* Put it in env. */ if (putenv ("CONFTEST_putenv=val")) return 1; /* Try to remove it. */ if (putenv ("CONFTEST_putenv")) return 2; /* Make sure it was deleted. */ if (getenv ("CONFTEST_putenv") != 0) return 3; return 0; ]])], gl_cv_func_svid_putenv=yes, gl_cv_func_svid_putenv=no, dnl When crosscompiling, assume putenv is broken. [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_svid_putenv="guessing yes" ;; # Guess no on native Windows. mingw*) gl_cv_func_svid_putenv="guessing no" ;; # If we don't know, assume the worst. *) gl_cv_func_svid_putenv="guessing no" ;; esac ]) ]) case "$gl_cv_func_svid_putenv" in *yes) ;; *) REPLACE_PUTENV=1 ;; esac ]) # Prerequisites of lib/putenv.c. AC_DEFUN([gl_PREREQ_PUTENV], [ AC_CHECK_DECLS([_putenv]) ])