*.mk: DEFAULT_CPPFLAGS: -D_GNU_SOURCE

To get some definitions that are essential in our programs.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/share/mk/build/src.mk b/share/mk/build/src.mk
index 3f035f7f5e7bb6f45ecd3d4b4a3281a435ba985e..b7cf5e3e3cc9d4de9564b415d2d4e14790a1eb95 100644 (file)
--- a/share/mk/build/src.mk
+++ b/share/mk/build/src.mk
@@ -17,7 +17,9 @@ include $(MAKEFILEDIR)/verbose.mk
 PKGCONF_LIBS := libbsd-overlay
 
 
-DEFAULT_CPPFLAGS := $(shell $(PKGCONF) --cflags $(PKGCONF_LIBS) $(HIDE_ERR))
+DEFAULT_CPPFLAGS := \
+       $(shell $(PKGCONF) --cflags $(PKGCONF_LIBS) $(HIDE_ERR)) \
+       -D_GNU_SOURCE
 EXTRA_CPPFLAGS   :=
 CPPFLAGS         := $(DEFAULT_CPPFLAGS) $(EXTRA_CPPFLAGS)