util/cbfstool: use _XOPEN_SOURCE=700 to find strdup(3)
Change-Id: I974c6c8733356cc8ea4e0505136a34b6055abf0c
Signed-off-by: Jonathan A. Kollasch <jakllsch@kollasch.net>
Reviewed-on: http://review.coreboot.org/10809
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
diff --git a/util/cbfstool/Makefile.inc b/util/cbfstool/Makefile.inc
index dde8c68..976f0c2 100644
--- a/util/cbfstool/Makefile.inc
+++ b/util/cbfstool/Makefile.inc
@@ -45,7 +45,7 @@
TOOLCFLAGS += -Wcast-qual -Wmissing-prototypes -Wredundant-decls -Wshadow
TOOLCFLAGS += -Wstrict-prototypes -Wwrite-strings
TOOLCPPFLAGS ?= -D_DEFAULT_SOURCE # memccpy() from string.h
-TOOLCPPFLAGS += -D_POSIX_C_SOURCE=200809L # strdup() from string.h
+TOOLCPPFLAGS += -D_XOPEN_SOURCE=700 # strdup() from string.h
TOOLCPPFLAGS += -I$(top)/util/cbfstool/flashmap
TOOLCPPFLAGS += -I$(top)/util/cbfstool
TOOLCPPFLAGS += -I$(objutil)/cbfstool