2 dnl $Heimdal: check-var.m4,v 1.7 2003/02/17 00:44:57 lha Exp $
4 dnl rk_CHECK_VAR(variable, includes)
5 AC_DEFUN([rk_CHECK_VAR], [
6 AC_MSG_CHECKING(for $1)
7 AC_CACHE_VAL(ac_cv_var_$1, [
10 void * foo() { return &$1; }],
12 ac_cv_var_$1=yes, ac_cv_var_$1=no)])
13 if test "$ac_cv_var_$1" != yes ; then
14 AC_TRY_LINK([extern int $1;
15 int foo() { return $1; }],
17 ac_cv_var_$1=yes, ac_cv_var_$1=no)
20 ac_foo=`eval echo \\$ac_cv_var_$1`
21 AC_MSG_RESULT($ac_foo)
22 if test "$ac_foo" = yes; then
23 AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]$1), 1,
24 [Define if you have the `]$1[' variable.])
25 m4_ifval([$2], AC_CHECK_DECLARATION([$2],[$1]))
29 AC_WARNING_ENABLE([obsolete])
30 AU_DEFUN([AC_CHECK_VAR], [rk_CHECK_VAR([$2], [$1])], [foo])