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xserver_xorg-server: use -O2 build optimization level

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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.

Fixes bug #8436.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
[Thomas: add comment in .mk file, add reference to bug.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Gustavo Zacarias 2016-05-05 21:08:27 -03:00 committed by Thomas Petazzoni
parent f80735ce39
commit 5500211e20
1 changed files with 4 additions and 1 deletions
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package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
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@ -56,13 +56,16 @@ XSERVER_XORG_SERVER_DEPENDENCIES = \
mcookie \
host-pkgconf
# We force -O2 regardless of the optimization level chosen by the
# user, as the X.org server is known to trigger some compiler bugs at
# -Os on several architectures.
XSERVER_XORG_SERVER_CONF_OPTS = \
--disable-config-hal \
--disable-xnest \
--disable-xephyr \
--disable-dmx \
--with-builder-addr=buildroot@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