Hi, Bug 1512504 has now landed on autoland, meaning that compiling Firefox with MSVC is now not supported anymore. MSVC is however still necessary as a build requirement for its headers and libraries (as well as its assembler on aarch64 and the preprocessor for midl ; and maybe a few other things)
Mike On Thu, Dec 06, 2018 at 03:00:12PM -0500, Ted Mielczarek wrote: > Hello, > > In light of the fact that we've switched to clang-cl for our Windows > builds[1], we are planning to drop support for compiling Firefox with MSVC in > the near future[2]. Our estimate is that this will happen sometime in Q1. > Supporting more than one compiler is a maintenance burden and we've already > seen developers spend considerable time getting their patches that work with > clang-cl to build with MSVC. We are currently blocked by the fact that our > aarch64-windows builds are still using MSVC and we are waiting on upstream > clang-cl work to switch those builds to clang-cl. Once that takes place we no > longer have a compelling reason to continue supporting MSVC. > > To preempt the question--when this happens we intend to make MSVC error in > configure, and not just move MSVC to Tier 3 "patches welcome" status. Our > reasoning is that Tier 3 configurations still create work: developers spend > time building in those configurations, and lack of CI coverage means that > when they inevitably break they waste time trying to fix things. Bugs get > filed, and other developers waste time trying to help or reviewing patches to > fix things. Explicitly unsupporting MSVC is the best way for us to convey the > fact that developers should not be using it and we will not accept patches to > fix issues that only affect MSVC. > > If you have specific reasons for continuing to use MSVC please let us know. > If there are deficiencies in clang-cl compared to MSVC we should get them > filed and fixed. > > Thanks, > -Ted > > 1. https://bugzilla.mozilla.org/show_bug.cgi?id=1443590 > 2. https://bugzilla.mozilla.org/show_bug.cgi?id=1512504 > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
