klimek 503f0a9868 Implement user experience for LIPO / ThinLTO users. ... Add flag --convert_lipo_to_thinlto, which allows builds with LLVM to use ThinLTO when the user specifies LIPO + FDO flags; if that flag is not set, and the user requests a build with LLVM, the compile will now fail. Add an attribute supports_lipo to the DefaultCpuToolchain crosstool proto and skip default toolchains that do not support LIPO when the user has specified LIPO flags in the toolchain selection; this enables CROSSTOOL files to cause an implicit fallback to a hybrid / LIPO toolchain when using an LLVM toolchain as the default. Add a CrosstoolBuilder to MockCcSupport and add a new method setupCrosstoolFromScratch that allows unit tests to fully control the setup. The other methods available in MockCcSupport will always load in a default CROSSTOOL file and may show different unit test results depending on the content of that file. RELNOTES: None. PiperOrigin-RevId: 163819246		2019-01-09 08:53:47 +01:00
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com/github/bazelbuild/bazel/src/main/protobuf	Implement user experience for LIPO / ThinLTO users.	2019-01-09 08:53:47 +01:00