diff --git a/configure.in b/configure.in
index eb71bdf0b0...342baf10c5 100644
--- a/configure.in
+++ b/configure.in
@@ -102,16 +102,16 @@
 
 AC_C_CONST
 AC_TYPE_INTPTR_T
-AX_CFLAGS_GCC_OPTION(-Wall)
-AX_CFLAGS_GCC_OPTION(-Wextra)
+AX_CHECK_COMPILE_FLAG(-Wall)
+AX_CHECK_COMPILE_FLAG(-Wextra)
 
 dnl Overly-enthusiastic warning suppression.
 save_CFLAGS="$CFLAGS"
-AX_CFLAGS_GCC_OPTION([-Wgnu-zero-variadic-macro-arguments], ,
+AX_CHECK_COMPILE_FLAG([-Wgnu-zero-variadic-macro-arguments],
                      AC_DEFINE([HAVE_VARIADIC_MACRO_WARNING], 1,
                                [Define if compiler recognises warning option]))
-AX_CFLAGS_GCC_OPTION([-Werror=unknown-warning-option])
-AX_CFLAGS_GCC_OPTION([-Wformat-truncation], ,
+AX_CHECK_COMPILE_FLAG([-Werror=unknown-warning-option])
+AX_CHECK_COMPILE_FLAG([-Wformat-truncation],
                      AC_DEFINE([HAVE_FORMAT_TRUNCATION_WARNING], 1,
                                [Define if compiler recognises warning option]))
 CFLAGS="$save_CFLAGS"
@@ -242,13 +242,13 @@
 else
 	if test "x$enable_debug" = "xgdb"
 	then
-		AX_CFLAGS_GCC_OPTION([-ggdb])
-		AX_CFLAGS_GCC_OPTION([-O0])
+		AX_CHECK_COMPILE_FLAG([-ggdb])
+		AX_CHECK_COMPILE_FLAG([-O0])
 		COMPILE_DEBUG='gdb'
 	fi
 	if test "x$ac_cv_cflags_gcc_option__ggdb" = "x"
 	then
-		AX_CFLAGS_GCC_OPTION([-g])
+		AX_CHECK_COMPILE_FLAG([-g])
 		COMPILE_DEBUG='yes'
 	fi
 	EXTRA_OBJS="$EXTRA_OBJS null_out.o md5.o"