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Merge pull request #10585 from amosbird/thinlto

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Enable thinLTO
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alexey-milovidov 2020-05-02 14:40:47 +03:00 committed by GitHub
commit 734aef8972
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1 changed files with 10 additions and 0 deletions
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CMakeLists.txt
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@ -223,6 +223,16 @@ if (COMPILER_CLANG)
# Display absolute paths in error messages. Otherwise KDevelop fails to navigate to correct file and opens a new file instead.
set(COMPILER_FLAGS "${COMPILER_FLAGS} -fdiagnostics-absolute-paths")
# We cannot afford to use LTO when compiling unitests, and it's not enough
# to only supply -fno-lto at the final linking stage. So we disable it
# completely.
if (NOT ENABLE_TESTS AND NOT SANITIZE)
# Link time optimization
set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -flto=thin")
set (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -flto=thin")
set (CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} -flto=thin")
endif ()
# Always prefer llvm tools when using clang. For instance, we cannot use GNU ar when llvm LTO is enabled
find_program (LLVM_AR_PATH NAMES "llvm-ar" "llvm-ar-10" "llvm-ar-9" "llvm-ar-8")