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Makefile: append the CFLAGS to existing ones
Allow the user to pass custom CFLAGS (eg. optimisation flags).
Do not use EXTRA_CFLAGS, append to existing CFLAGS with += (Arnout)
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
---
Patch not sent upstream.
Although not specific to buildroot, I am not sure this is the best
way to handle user-supplied CFLAGS.
diff -durN dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef.orig/Makefile dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef/Makefile
--- dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef.orig/Makefile 2012-10-22 22:02:47.541240846 +0200
+++ dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef/Makefile 2012-10-22 22:03:21.151047833 +0200
@@ -18,7 +18,8 @@
CPPFLAGS = -I libfdt -I .
WARNINGS = -Werror -Wall -Wpointer-arith -Wcast-qual -Wnested-externs \
-Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls
-CFLAGS = -g -Os -fPIC -Werror $(WARNINGS)
+CFLAGS ?= -g -Os
+CFLAGS += -fPIC $(WARNINGS)
BISON = bison
LEX = flex
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