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[LLVM] Ship clang resource headers and compiler-rt builtins; disable LZMA - #724
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…LZMA Needed by projects/orc-pgo, whose driver is built on the clang libraries and links LLVM statically into user executables: - clang-resource-headers: builtin headers (stddef.h, arm_neon.h, ...). - compiler-rt builtins only (LLVM_ENABLE_RUNTIMES=compiler-rt, every compiler-rt runtime off, non-Windows), e.g. libclang_rt.osx.a for __builtin_available. - LLVM_ENABLE_LZMA=OFF so static LLVM consumers don't link liblzma. Also fix the distribution component list: the list(APPEND ... LLVM MLIR) after the CACHE set never reached the cache (only cache entries survive a -C script), so build the full list first and cache it once.
makslevental
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First PR of the
orc-pgostack (runtime PGO via embedded bitcode + ORC JIT). The project's driver is built on the clang libraries and links LLVM statically into user executables. That needs a few additions to the distribution:clang-resource-headers: clang's builtin headers (lib/clang/<N>/include:stddef.h,arm_neon.h, …). Without them the driver can't compile anything that includes them.LLVM_ENABLE_RUNTIMES=compiler-rtwith every compiler-rt runtime turned off, plus thebuiltinsdistribution component. On macOS this provideslib/clang/<N>/lib/darwin/libclang_rt.osx.a. Without it the Darwin driver silently skips the library, and e.g.__builtin_availablefails to link.LLVM_ENABLE_LZMA=OFF:llvm-config --link-static --system-libscurrently reports-llzma, so anything linking LLVM statically would pick up the liblzma dylib.Also fixes the distribution component list. The
list(APPEND … LLVM MLIR)after theCACHEset never reached the cache, because only cache entries survive a-Cscript. The cached list ended atmlir-translate. The full list is now built first and cached once.LLVM,MLIRandbuiltinsare now real dependencies ofinstall-mlirdevelopment-distribution; this was checked with a fresh configure andninja -t query.Note: none of the cache values use
FORCE, so an existing build directory keeps its old cached values. Reconfigure from a fresh build directory, or deleteCMakeCache.txt.