Trusty PPA build fails

[Chris Coulson]

The Trusty PPA build (71548c4) fails with an error like this:

FAILED: /usr/bin/arm-linux-gnueabihf-g++ -MMD -MF base/debug/activity_tracker.o.d -I/tmp/tmp7LfDjr/gen -I/<<PKGBUILDDIR>> -DNO_TCMALLOC -D__STDC_FORMAT_MACROS -O2 -g0 -D_FILE_OFFSET_BITS=64 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -pthread -pipe -fno-exceptions -std=c++11 -Wno-c++11-narrowing -c /<<PKGBUILDDIR>>/base/debug/activity_tracker.cc -o base/debug/activity_tracker.o
In file included from /<<PKGBUILDDIR>>/base/debug/activity_tracker.h:28:0,
                 from /<<PKGBUILDDIR>>/base/debug/activity_tracker.cc:5:
/<<PKGBUILDDIR>>/base/metrics/persistent_memory_allocator.h: In instantiation of ‘T* base::PersistentMemoryAllocator::GetAsObject(base::PersistentMemoryAllocator::Reference, uint32_t) [with T = base::debug::ThreadActivityTracker::Header; base::PersistentMemoryAllocator::Reference = unsigned int; uint32_t = unsigned int]’:
/<<PKGBUILDDIR>>/base/debug/activity_tracker.cc:1026:44: required from here
/<<PKGBUILDDIR>>/base/metrics/persistent_memory_allocator.h:281:5: error: static assertion failed: only simple objects
     static_assert(std::is_pod<T>::value, "only simple objects");
     ^
cc1plus: warning: unrecognized command line option "-Wno-c++11-narrowing" [enabled by default]
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', '/tmp/tmp7LfDjr', '-v', 'gn']' returned non-zero exit status 1
Building gn manually in a temporary directory for bootstrapping...
CMake Error at oxide/build/scripts/bootstrap-gn.cmake:59 (message):
  Failed to bootstrap Generate Ninja binary

CMake Error at oxide/build/cmake/ChromiumBuildShim.cmake:66 (message):
  Failed to bootstrap Generate Ninja binary
Call Stack (most recent call first):
  oxide/build/cmake/ChromiumBuildShim.cmake:298 (_bootstrap_gn)
  oxide/CMakeLists.txt:224 (run_generate_ninja)

-- Configuring incomplete, errors occurred!

[Chris Coulson (chrisccoulson)]

This is basically a result of std::atomic not being a POD type with GCC 4.8