--- a/src/gmp/configure.in
+++ b/src/gmp/configure.in
@@ -67,7 +67,7 @@
 dnl  Note that there's a copy of these options in the top-level Makefile.am,
 dnl  so update there too if changing anything.
 dnl
-AM_INIT_AUTOMAKE([1.8 gnu no-dependencies $(top_builddir)/ansi2knr])
+AM_INIT_AUTOMAKE([1.8 gnu no-dependencies])
 AM_CONFIG_HEADER(config.h:config.in)
 AM_MAINTAINER_MODE
 
@@ -1880,7 +1880,6 @@
 GMP_PROG_CC_FOR_BUILD
 GMP_PROG_CPP_FOR_BUILD
 GMP_PROG_EXEEXT_FOR_BUILD
-GMP_C_FOR_BUILD_ANSI
 GMP_CHECK_LIBM_FOR_BUILD
 
 
@@ -2025,9 +2024,6 @@
 fi
 echo "      MPN_PATH=\"$path\""
 
-
-# Automake ansi2knr support.
-AM_C_PROTOTYPES
 
 GMP_PROG_AR
 GMP_PROG_NM