[Skiboot] [PATCH] Honor compilation flags passed from the environment

[Frédéric Bonnard]

From: Frederic Bonnard <frediz at linux.vnet.ibm.com>

Adding the environment variables CFLAGS, CPPFLAGS and LDFLAGS to the one in the
Makefiles. Debian/Ubuntu use this mechanism to do hardened builds.

Signed-off-by: Frederic Bonnard <frediz at linux.vnet.ibm.com>
---
 external/gard/Makefile     | 6 +++---
 external/opal-prd/Makefile | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/external/gard/Makefile b/external/gard/Makefile
index 4f0400e..de940ee 100644
--- a/external/gard/Makefile
+++ b/external/gard/Makefile
@@ -4,10 +4,10 @@ prefix = /usr/local/
 sbindir = $(prefix)/sbin
 
 CC = $(CROSS_COMPILE)gcc
-CFLAGS = -m64 -Werror -Wall -g2 -ggdb
-LDFLAGS = -m64
+CFLAGS += -m64 -Werror -Wall -g2 -ggdb
+LDFLAGS += -m64
 ASFLAGS = -m64
-CPPFLAGS = -I. -I../../
+CPPFLAGS += -I. -I../../
 
 OBJS = file_flash.o gard.o libflash.o libffs.o ecc.o
 
diff --git a/external/opal-prd/Makefile b/external/opal-prd/Makefile
index 433ab71..fa5872a 100644
--- a/external/opal-prd/Makefile
+++ b/external/opal-prd/Makefile
@@ -1,9 +1,9 @@
 CC = $(CROSS_COMPILE)gcc
 
-CFLAGS = -m64 -Werror -Wall -g2 -ggdb
-LDFLAGS = -m64
+CFLAGS += -m64 -Werror -Wall -g2 -ggdb
+LDFLAGS += -m64
 ASFLAGS = -m64
-CPPFLAGS = -I. -I../../include -I../../
+CPPFLAGS += -I. -I../../include -I../../
 
 prefix = /usr/local/
 sbindir = $(prefix)/sbin
-- 
1.9.1