Merge lp:~cjwatson/dee-qt/powerpc-pie into lp:dee-qt

[Colin Watson]

Work around pointer equality problem with -Bsymbolic-functions on powerpc/ppc64el.

dee-qt fails to build on powerpc/ppc64el with a signaltest failure. Albert Astals Cid tracked down http://lists.linaro.org/pipermail/linaro-toolchain/2014-January/003942.html which discusses a similar problem, and there's a hint in that thread that building with PIE support works around the problem. I've confirmed that this patch fixes the build on powerpc and ppc64el; for the sake of conservatism I've written it such that it only affects powerpc-based architectures.

[PS Jenkins bot (ps-jenkins)]

PASSED: Continuous integration, rev:88
http://jenkins.qa.ubuntu.com/job/dee-qt-ci/19/
Executed test runs:
    SUCCESS: http://jenkins.qa.ubuntu.com/job/dee-qt-trusty-amd64-ci/7
    SUCCESS: http://jenkins.qa.ubuntu.com/job/dee-qt-trusty-armhf-ci/7

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/dee-qt-ci/19/rebuild

review: Approve (continuous-integration)

[Albert Astals Cid (aacid)]

I can confirm that this makes it build on the porter ppc machines, weather or not this is the appropiate/better bug i have no really opinion on since this is well below my knowledge level

review: Approve

[Albert Astals Cid (aacid)]

below in the stack i mean :D

=== modified file 'debian/rules'
--- debian/rules	2013-01-31 18:29:57 +0000
+++ debian/rules	2014-03-17 13:14:17 +0000
@@ -4,6 +4,13 @@
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE=1
 
+DEB_HOST_GNU_TYPE := $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
+ifneq (,$(findstring powerpc,$(DEB_HOST_GNU_TYPE)))
+# Work around pointer equality problem with -Bsymbolic-functions:
+#   http://lists.linaro.org/pipermail/linaro-toolchain/2014-January/003944.html
+export DEB_BUILD_MAINT_OPTIONS := hardening=+pie
+endif
+
 export DPKG_GENSYMBOLS_CHECK_LEVEL=4
 
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