|
Packit |
33f14e |
# putenv.m4 serial 20
|
|
Packit |
33f14e |
dnl Copyright (C) 2002-2017 Free Software Foundation, Inc.
|
|
Packit |
33f14e |
dnl This file is free software; the Free Software Foundation
|
|
Packit |
33f14e |
dnl gives unlimited permission to copy and/or distribute it,
|
|
Packit |
33f14e |
dnl with or without modifications, as long as this notice is preserved.
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
dnl From Jim Meyering.
|
|
Packit |
33f14e |
dnl
|
|
Packit |
33f14e |
dnl Check whether putenv ("FOO") removes FOO from the environment.
|
|
Packit |
33f14e |
dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that.
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
AC_DEFUN([gl_FUNC_PUTENV],
|
|
Packit |
33f14e |
[
|
|
Packit |
33f14e |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
|
|
Packit |
33f14e |
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
Packit |
33f14e |
AC_CACHE_CHECK([for putenv compatible with GNU and SVID],
|
|
Packit |
33f14e |
[gl_cv_func_svid_putenv],
|
|
Packit |
33f14e |
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[
|
|
Packit |
33f14e |
/* Put it in env. */
|
|
Packit |
33f14e |
if (putenv ("CONFTEST_putenv=val"))
|
|
Packit |
33f14e |
return 1;
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
/* Try to remove it. */
|
|
Packit |
33f14e |
if (putenv ("CONFTEST_putenv"))
|
|
Packit |
33f14e |
return 2;
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
/* Make sure it was deleted. */
|
|
Packit |
33f14e |
if (getenv ("CONFTEST_putenv") != 0)
|
|
Packit |
33f14e |
return 3;
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
return 0;
|
|
Packit |
33f14e |
]])],
|
|
Packit |
33f14e |
gl_cv_func_svid_putenv=yes,
|
|
Packit |
33f14e |
gl_cv_func_svid_putenv=no,
|
|
Packit |
33f14e |
dnl When crosscompiling, assume putenv is broken.
|
|
Packit |
33f14e |
[case "$host_os" in
|
|
Packit |
33f14e |
# Guess yes on glibc systems.
|
|
Packit |
33f14e |
*-gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
|
|
Packit |
33f14e |
# If we don't know, assume the worst.
|
|
Packit |
33f14e |
*) gl_cv_func_svid_putenv="guessing no" ;;
|
|
Packit |
33f14e |
esac
|
|
Packit |
33f14e |
])
|
|
Packit |
33f14e |
])
|
|
Packit |
33f14e |
case "$gl_cv_func_svid_putenv" in
|
|
Packit |
33f14e |
*yes) ;;
|
|
Packit |
33f14e |
*)
|
|
Packit |
33f14e |
REPLACE_PUTENV=1
|
|
Packit |
33f14e |
;;
|
|
Packit |
33f14e |
esac
|
|
Packit |
33f14e |
])
|
|
Packit |
33f14e |
|
|
Packit |
33f14e |
# Prerequisites of lib/putenv.c.
|
|
Packit |
33f14e |
AC_DEFUN([gl_PREREQ_PUTENV],
|
|
Packit |
33f14e |
[
|
|
Packit |
33f14e |
AC_CHECK_DECLS([_putenv])
|
|
Packit |
33f14e |
])
|