--- fim-0.3/configure.ac
+++ fim-0.3/configure.ac
@@ -86,10 +86,6 @@
 AC_MSG_RESULT($fim_cv_prefix)
 
 AC_ISC_POSIX
-AM_C_PROTOTYPES
-if test "x$U" != "x"; then
-  AC_MSG_ERROR(Compiler not ANSI compliant)
-fi
 #AC_PROG_CPP
 AC_PROG_MAKE_SET