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samba-mirror/third_party/heimdal/cf/check-var.m4
Stefan Metzmacher 7055827b8f HEIMDAL: move code from source4/heimdal* to third_party/heimdal*
This makes it clearer that we always want to do heimdal changes
via the lorikeet-heimdal repository.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>

Autobuild-User(master): Joseph Sutton <jsutton@samba.org>
Autobuild-Date(master): Wed Jan 19 21:41:59 UTC 2022 on sn-devel-184
2022-01-19 21:41:59 +00:00

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dnl $Id$
dnl
dnl rk_CHECK_VAR(variable, includes)
AC_DEFUN([rk_CHECK_VAR], [
AC_MSG_CHECKING(for $1)
AC_CACHE_VAL(ac_cv_var_$1, [
m4_ifval([$2],[
AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
void * foo(void) { return &$1; }]],[[foo()]])],
[ac_cv_var_$1=yes],[ac_cv_var_$1=no])])
if test "$ac_cv_var_$1" != yes ; then
AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
extern int $1;
int foo(void) { return $1; }]],[[foo()]])],
[ac_cv_var_$1=yes],[ac_cv_var_$1=no])
fi
])
ac_foo=`eval echo \\$ac_cv_var_$1`
AC_MSG_RESULT($ac_foo)
if test "$ac_foo" = yes; then
AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]$1), 1,
[Define if you have the `]$1[' variable.])
m4_ifval([$2], [AC_CHECK_DECLS([$1],[],[],[$2])])
fi
])
AC_WARNING_ENABLE([obsolete])
AU_DEFUN([AC_CHECK_VAR], [rk_CHECK_VAR([$2], [$1])], [foo])