Bug#746859: iceweasel: ftbfs with GCC-4.9

[Matthias Klose]

Package: src:iceweasel
Version: 24.4.0esr-1
Severity: important
Tags: sid jessie
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-4.9

The package fails to build in a test rebuild on at least amd64 with
gcc-4.9/g++-4.9, but succeeds to build with gcc-4.8/g++-4.8. The
severity of this report may be raised before the jessie release.

The full build log can be found at:
http://people.debian.org/~doko/logs/failed-gcc49/iceweasel_24.4.0esr-1_unstable_gcc49.log
The last lines of the build log are at the end of this report.

To build with GCC 4.9, either set CC=gcc-4.9 CXX=g++-4.9 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ 

Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols
files.  For other C/C++ related build failures see the porting guide
at http://gcc.gnu.org/gcc-4.9/porting_to.html

[...]
                 from ../../dist/include/mozilla/Atomics.h:176,
                 from /«PKGBUILDDIR»/mfbt/tests/TestAtomics.cpp:6:
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = unsigned int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)1u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<unsigned int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = unsigned int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)0u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<unsigned int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)1u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)0u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = long int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)1u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<long int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = long int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)0u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<long int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = long unsigned int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)1u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<long unsigned int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
/usr/include/c++/4.9/bits/atomic_base.h: In static member function 'static bool mozilla::detail::IntrinsicMemoryOps<T, Order>::compareExchange(typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType&, T, T) [with T = long unsigned int; mozilla::MemoryOrdering Order = (mozilla::MemoryOrdering)0u; typename mozilla::detail::IntrinsicMemoryOps<T, Order>::Base::ValueType = std::atomic<long unsigned int>]':
/usr/include/c++/4.9/bits/atomic_base.h:581:70: error: failure memory model cannot be stronger than success memory model for '__atomic_compare_exchange'
  return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);
                                                                      ^
make[6]: *** [TestAtomics.o] Error 1
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [libs] Error 2
make[6]: Leaving directory `/«PKGBUILDDIR»/build-xulrunner/mfbt/tests'
make[5]: Leaving directory `/«PKGBUILDDIR»/build-xulrunner/mfbt'
make[4]: *** [libs_tier_base] Error 2
make[4]: Leaving directory `/«PKGBUILDDIR»/build-xulrunner'
make[3]: *** [tier_base] Error 2
make[3]: Leaving directory `/«PKGBUILDDIR»/build-xulrunner'
make[2]: *** [default] Error 2
dh_auto_build: make -j10 _LEAKTEST_FILES=leaktest.py JS_READLINE=1 returned exit code 2
make[2]: Leaving directory `/«PKGBUILDDIR»/build-xulrunner'
make[1]: *** [stamps/build-xulrunner] Error 2
make[1]: Leaving directory `/«PKGBUILDDIR»'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2