etc/services - sync with NetBSD-8
[minix.git] / crypto / external / bsd / heimdal / dist / cf / check-var.m4
blobeed3796efda14998dada8480ca37f859be13f996
1 dnl Id
2 dnl
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 m4_ifval([$2],[
8         AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
9         void * foo(void) { return &$1; }]],[[foo()]])],
10             [ac_cv_var_$1=yes],[ac_cv_var_$1=no])])
11 if test "$ac_cv_var_$1" != yes ; then
12 AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
13 extern int $1;
14 int foo(void) { return $1; }]],[[foo()]])],
15             [ac_cv_var_$1=yes],[ac_cv_var_$1=no])
18 ac_foo=`eval echo \\$ac_cv_var_$1`
19 AC_MSG_RESULT($ac_foo)
20 if test "$ac_foo" = yes; then
21         AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]$1), 1, 
22                 [Define if you have the `]$1[' variable.])
23         m4_ifval([$2], AC_CHECK_DECLS([$1],[],[],[$2]))
27 AC_WARNING_ENABLE([obsolete])
28 AU_DEFUN([AC_CHECK_VAR], [rk_CHECK_VAR([$2], [$1])], [foo])