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-rw-r--r--Makefile.am2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am
index 46191f7..9dfdb69 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,7 +5,7 @@ CLEANFILES = *~
bin_PROGRAMS = lcd4linux
-AM_CFLAGS = $(X_CFLAGS) -Wall
+AM_CFLAGS = $(X_CFLAGS) -D_GNU_SOURCE -Wall
lcd4linux_LDFLAGS = $(X_LIBS)
if WITH_X
lcd4linux_LDADD = -lX11