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#serial 4
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.
dnl
AC_DEFUN(jm_FUNC_PUTENV,
[AC_CACHE_CHECK([for SVID conformant putenv], jm_cv_func_svid_putenv,
[AC_TRY_RUN([
int
main ()
{
/* Put it in env. */
if (putenv ("CONFTEST_putenv=val"))
exit (1);
/* Try to remove it. */
if (putenv ("CONFTEST_putenv"))
exit (1);
/* Make sure it was deleted. */
if (getenv ("CONFTEST_putenv") != 0)
exit (1);
exit (0);
}
],
jm_cv_func_svid_putenv=yes,
jm_cv_func_svid_putenv=no,
dnl When crosscompiling, assume putenv is broken.
jm_cv_func_svid_putenv=no)
])
if test $jm_cv_func_svid_putenv = no; then
AC_LIBOBJ(putenv)
AC_DEFINE_UNQUOTED(putenv, rpl_putenv,
[Define to rpl_putenv if the replacement function should be used.])
fi
])
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