Index: libdca-0.0.5/configure.ac
===================================================================
--- libdca-0.0.5.orig/configure.ac
+++ libdca-0.0.5/configure.ac
@@ -32,7 +32,6 @@ if test x"$GCC" = x"yes"; then
     TRY_CFLAGS=`echo "$OPT_CFLAGS $CFLAGS"|sed "s/-O[0-9]*//g"`
     changequote([,])
     TRY_CFLAGS="$TRY_CFLAGS -O3"
-    AC_TRY_CFLAGS([$TRY_CFLAGS],[OPT_CFLAGS=$TRY_CFLAGS; CFLAGS=""])
 
     AC_ARG_ENABLE([debug],
 	[  --enable-debug          debug mode configuration])