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[FreeBSD/releng/9.2.git] / crypto / heimdal / cf / need-proto.m4
1 dnl $Id: need-proto.m4 14166 2004-08-26 12:35:42Z joda $
2 dnl
3 dnl
4 dnl Check if we need the prototype for a function
5 dnl
6
7 dnl AC_NEED_PROTO(includes, function)
8
9 AC_DEFUN([AC_NEED_PROTO], [
10 if test "$ac_cv_func_$2+set" != set -o "$ac_cv_func_$2" = yes; then
11 AC_CACHE_CHECK([if $2 needs a prototype], ac_cv_func_$2_noproto,
12 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$1
13 struct foo { int foo; } xx;
14 extern int $2 (struct foo*);]],[[$2(&xx)]])],
15 [eval "ac_cv_func_$2_noproto=yes"],
16 [eval "ac_cv_func_$2_noproto=no"]))
17 if test "$ac_cv_func_$2_noproto" = yes; then
18         AC_DEFINE(AS_TR_CPP(NEED_[]$2[]_PROTO), 1,
19                 [define if the system is missing a prototype for $2()])
20 fi
21 fi
22 ])