add macro define for inlining
diff --git a/configure.in b/configure.in
index d2d2c68..c74ab25 100644
--- a/configure.in
+++ b/configure.in
@@ -141,7 +141,7 @@
 else
 CFLAGS="$CFLAGS -O3 -DNDEBUG"
 	if test x$GCC = xyes; then
-		CFLAGS="$CFLAGS -fomit-frame-pointer -funroll-loops -finline-functions"
+		CFLAGS="$CFLAGS -fomit-frame-pointer -funroll-loops -finline-functions -Winline -DFLAC__INLINE=__inline__"
 	fi
 fi