Following private discussion, this version of the patch enables
-fno-strict-aliasing selectively by architecture, to avoid possibly
slowing down those that don't need it.
(I included sparc, which currently works, because the big-endian code is
undefined as opposed to guaranteed wrong, and hence might break later
from an apparently unrelated change.)
If this is what the problem is, it is still present in 2.12rc, and the
same fix should work there.
diff -up debian/rules_orig debian/rules
--- debian/rules_orig 2013-09-12 23:01:10.938897982 +0100
+++ debian/rules 2013-09-16 23:55:27.712339252 +0100
@@ -6,8 +6,14 @@
#http://wiki.debian.org/Hardening#Notes_for_packages_using_CMake
CPPFLAGS:=$(shell dpkg-buildflags --get CPPFLAGS)
+ifneq (,$(findstring $(DEB_HOST_ARCH), amd64 i386 mipsel ia64 armel armhf arm64))
CFLAGS:=$(shell dpkg-buildflags --get CFLAGS) $(CPPFLAGS)
CXXFLAGS:=$(shell dpkg-buildflags --get CXXFLAGS) $(CPPFLAGS)
+else
+#required on big-endian architectures, see bug 722115
+CFLAGS:=$(shell dpkg-buildflags --get CFLAGS) $(CPPFLAGS) -fno-strict-aliasing
+CXXFLAGS:=$(shell dpkg-buildflags --get CXXFLAGS) $(CPPFLAGS) -fno-strict-aliasing
+endif
LDFLAGS:=$(shell dpkg-buildflags --get LDFLAGS)
CMAKE_FLAGS = \
