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-rw-r--r--src/aclocal.m43
1 files changed, 2 insertions, 1 deletions
diff --git a/src/aclocal.m4 b/src/aclocal.m4
index d1e98522e..cd4ac9c1a 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -1462,7 +1462,8 @@ AC_DEFUN([KRB5_NEED_PROTO], [
ifelse([$3], ,[if test "x$ac_cv_func_$2" = xyes; then])
AC_CACHE_CHECK([if $2 needs a prototype provided], krb5_cv_func_$2_noproto,
AC_TRY_COMPILE([$1],
-[struct k5foo {int foo; } xx;
+[#undef $2
+struct k5foo {int foo; } xx;
extern int $2 (struct k5foo*);
$2(&xx);
],