move _GNU_SOURCE to AM_CFLAGS

diff --git a/Makefile.am b/Makefile.am
index d194002..22e314d 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -23,9 +23,11 @@ gummibootlibdir = $(prefix)/lib/gummiboot
 
 AM_CPPFLAGS = -include config.h
 AM_CFLAGS = \
+       -D_GNU_SOURCE \
        -Wall \
        -Wextra \
-       -Wmissing-prototypes
+       -Wmissing-prototypes \
+       -Wno-unused-parameter
 AM_LDFLAGS =
 
 EXTRA_DIST = autogen.sh README LICENSE
@@ -41,7 +43,6 @@ gummiboot_SOURCES = \
 
 gummiboot_CFLAGS = \
        $(AM_CFLAGS) \
-       -Wno-unused-parameter -D_GNU_SOURCE \
        -DMACHINE_TYPE_NAME=\"$(MACHINE_TYPE_NAME)\" \
        -DGUMMIBOOTLIBDIR=\"$(gummibootlibdir)\" \
        $(BLKID_CFLAGS)