--- a/configure.in	2015-03-15 18:59:12.557417149 +0100
+++ b/configure.in	2015-03-15 18:59:29.273416518 +0100
@@ -8,7 +8,6 @@
 AC_PROG_CC
 AC_PROG_CXX
 AC_ISC_POSIX
-AM_C_PROTOTYPES
 if test "x$U" != "x"; then
   AC_MSG_ERROR(Compiler not ANSI compliant)
 fi