When building with a --enable-project that is neither js nor a
toolkit-based one (like browser or mobile/android), we don't want to be
building things that are specific to gecko and/or spidermonkey.
At the same time, this lifts the exception that js standalone doesn't
have an app.mozbuild included, and makes the moz.build parsers that
don't set a MOZ_BUILD_APP get the same information as they were through
toolkit.mozbuild.
We still keep mfbt, build and a few other DIRS set from the top-level,
because at the moment, there aren't really any --enable-project that
would benefit from those not being recursed.
We currently turn off the C++14 sized-deallocation facility on MSVC, and
we'd like to ensure we do the same thing for clang and gcc. To do so,
we add new functionality to moz.configure for checking and adding
compilation flags, similar to the facility for checking and adding
warning flags. The newly added facility is then used to add
-fno-sized-deallocation to the compilation flags, when the option is
supported.
Once we do this, we can't define the sized deallocation functions in
mozalloc.h; the compiler will complain that we are using
-fno-sized-deallocation, yet defining these special functions that we'll
never use. These functions were added for MinGW, where we needed to
compile with C++14 ahead of other platforms to be compatible with MSVC
headers. But they're no longer necessary, though they would be if we
removed -fno-sized-deallocation; the compiler will complain if we do
that and we'll add them back at that point.
Now that the nursery uses lazy allocation the resize decision is going to be
very quick, there's no point profiling it here.
--HG--
extra : rebase_source : 4433e516ecd1570ae38cc3647e19a0071f30a6b2
C5038 is a new warning in VS2017, similar to gcc and clang's -Wreorder, which is enabled by -Wall. We should enable C5038 so Windows developers can see these warnings locally instead of when gcc and clang fail with warnings-as-errors on Try.
https://blogs.msdn.microsoft.com/vcblog/2017/07/21/diagnostic-improvements-in-vs2017-15-3-0/
We need to suppress C5038 warnings from Windows Runtime Library header files (wrl.h) included in ANGLE and widget/windows:
z:\build\build\src\vs2017_15.4.2\SDK\Include\10.0.15063.0\winrt\wrl\wrappers\corewrappers.h(515): error C5038: data member 'Microsoft::WRL::Wrappers::Details::SyncLockWithStatusT<Microsoft::WRL::Wrappers::HandleTraits::SemaphoreTraits>::sync_' will be initialized after data member 'Microsoft::WRL::Wrappers::Details::SyncLockWithStatusT<Microsoft::WRL::Wrappers::HandleTraits::SemaphoreTraits>::status_'
...
And suppress C5038 warnings in upstream webrtc code:
media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseFilter.cpp(176): error C5038: data member 'mozilla::media::BaseFilter::mClsId' will be initialized after data member 'mozilla::media::BaseFilter::mState'
media/webrtc/trunk/webrtc/modules/video_capture/windows/BasePin.cpp(169): error C5038: data member 'mozilla::media::BasePin::mFilter' will be initialized after data member 'mozilla::media::BasePin::mLock'
media/webrtc/trunk/webrtc/modules/video_capture/windows/BasePin.cpp(170): error C5038: data member 'mozilla::media::BasePin::mLock' will be initialized after data member 'mozilla::media::BasePin::mName'
media/webrtc/trunk/webrtc/modules/video_capture/windows/BasePin.cpp(172): error C5038: data member 'mozilla::media::BasePin::mDirection' will be initialized after data member 'mozilla::media::BasePin::mQualitySink'
MozReview-Commit-ID: BMDVkvQXNoq
--HG--
extra : rebase_source : 0d5ede9530d0d0750b8fffdc1cdfdc646ec8f22a
