[Buildroot] [PATCH] xserver_xorg-server: use -O2 build optimization level

[Gustavo Zacarias]

The xorg server is somewhat sensitive to certain gcc versions combined
with -Os, particularly for ARM and MIPS, typically in the form of the
following symptom/error:

(EE) Segmentation fault at address 0x0
(EE)
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting

Force -O2 to work around this problem - for a target rootfs that uses
X11 the tradeoff is minimal since a sample/test image for qemu vexpress
with X11 + xinit + xterm + twm + xclock + gtk2 with demos is 60+ MB.

And it's less complicated than trying to find all of the bad
combinations.

Signed-off-by: Gustavo Zacarias <gustavo at zacarias.com.ar>
---
 package/x11r7/xserver_xorg-server/xserver_xorg-server.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk b/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
index 617bcbc..9de6d91 100644
--- a/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
+++ b/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
@@ -62,7 +62,7 @@ XSERVER_XORG_SERVER_CONF_OPTS = \
 	--disable-xephyr \
 	--disable-dmx \
 	--with-builder-addr=buildroot at buildroot.org \
-	CFLAGS="$(TARGET_CFLAGS) -I$(STAGING_DIR)/usr/include/pixman-1" \
+	CFLAGS="$(TARGET_CFLAGS) -I$(STAGING_DIR)/usr/include/pixman-1 -O2" \
 	--with-fontrootdir=/usr/share/fonts/X11/ \
 	--$(if $(BR2_PACKAGE_XSERVER_XORG_SERVER_XVFB),en,dis)able-xvfb
 
-- 
2.7.3