alsaloop: Use AM_CFLAGS in Makefile.am

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/alsaloop/Makefile.am b/alsaloop/Makefile.am
index f76eafde83dec5885e2a459fd7ed4f58c970295b..a6949116f701a296a01036365ba23f3761df8c7e 100644 (file)
--- a/alsaloop/Makefile.am
+++ b/alsaloop/Makefile.am
@@ -1,6 +1,6 @@
 INCLUDES = -I$(top_srcdir)/include
 LDADD = -lm
-CFLAGS += -D_GNU_SOURCE
+AM_CFLAGS = -D_GNU_SOURCE
 if HAVE_SAMPLERATE
 LDADD += -lsamplerate
 endif