diff -Nurd autoconf/lib/autoconf/c.m4 autoconf/lib/autoconf/c.m4
--- autoconf/lib/autoconf/c.m4	2008-06-17 21:41:23.000000000 +0300
+++ autoconf/lib/autoconf/c.m4	2008-06-17 22:04:53.000000000 +0300
@@ -224,7 +224,7 @@
 #ifdef __cplusplus
 extern "C"
 #endif
-char $2 ();])], [return $2 ();])])
+char $2 ();])], [return $2 () ? 1 : 0])])
 
 
 # AC_LANG_FUNC_LINK_TRY(C)(FUNCTION)
@@ -273,7 +273,7 @@
 #if defined __stub_$1 || defined __stub___$1
 choke me
 #endif
-], [return $1 ();])])
+], [return $1 () ? 1 : 0])])
 
 
 # AC_LANG_BOOL_COMPILE_TRY(C)(PROLOGUE, EXPRESSION)