1 dnl $Id: check-var.m4,v 1.6 2001/08/21 12:00:16 joda Exp $
3 dnl rk_CHECK_VAR(variable, includes)
4 AC_DEFUN([rk_CHECK_VAR], [
5 AC_MSG_CHECKING(for $1)
6 AC_CACHE_VAL(ac_cv_var_$1, [
7 AC_TRY_LINK([extern int $1;
8 int foo() { return $1; }],
10 ac_cv_var_$1=yes, ac_cv_var_$1=no)
12 ac_foo=`eval echo \\$ac_cv_var_$1`
13 AC_MSG_RESULT($ac_foo)
14 if test "$ac_foo" = yes; then
15 AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]$1), 1,
16 [Define if you have the `]$1[' variable.])
17 m4_ifval([$2], AC_CHECK_DECLARATION([$2],[$1]))
21 AC_WARNING_ENABLE([obsolete])
22 AU_DEFUN([AC_CHECK_VAR], [rk_CHECK_VAR([$2], [$1])], [foo])