2f08927fd5
This reverts commit fa65a228f4b46346e69e9b95805a8bcfa8483a60. This relands commit ab405fb6e9ff9202ca722f632b945d4b84c653f5. There was an issue where CMake versions <3.23.0 would not properly parse dep files, causing the build to file. This patch fixes that by just making CMake versions <3.23.0 use the fallback behavior.
44 lines
1.7 KiB
CMake
44 lines
1.7 KiB
CMake
# CMake policy settings shared between LLVM projects
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# MSVC debug information format flags are selected via
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# CMAKE_MSVC_DEBUG_INFORMATION_FORMAT, instead of
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# embedding flags in e.g. CMAKE_CXX_FLAGS_RELEASE.
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# New in CMake 3.25.
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#
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# Supports debug info with SCCache
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# (https://github.com/mozilla/sccache?tab=readme-ov-file#usage)
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# avoiding “fatal error C1041: cannot open program database; if
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# multiple CL.EXE write to the same .PDB file, please use /FS"
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if(POLICY CMP0141)
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cmake_policy(SET CMP0141 NEW)
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endif()
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# CMP0144: find_package() uses uppercase <PackageName>_ROOT variables.
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# New in CMake 3.27: https://cmake.org/cmake/help/latest/policy/CMP0144.html
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if(POLICY CMP0144)
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cmake_policy(SET CMP0144 NEW)
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endif()
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# CMP0147: Visual Studio Generators build custom commands in parallel.
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# New in CMake 3.27: https://cmake.org/cmake/help/latest/policy/CMP0147.html
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if(POLICY CMP0147)
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cmake_policy(SET CMP0147 NEW)
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endif()
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# CMP0156: De-duplicate libraries on link lines based on linker capabilities.
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# New in CMake 3.29: https://cmake.org/cmake/help/latest/policy/CMP0156.html
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# Avoids the deluge of 'ld: warning: ignoring duplicate libraries' warnings when
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# building with the Apple linker.
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if(POLICY CMP0156)
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cmake_policy(SET CMP0156 NEW)
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# CMP0179: De-duplication of static libraries on link lines keeps first occurrence.
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# Dependent on CMP0156=NEW. Unifies the behaviour across platforms.
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# Works around a LLD bug ELF backend bug (#116669) and required for CMP0156
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# to have an effect for affected versions. Also fixes building with CMake 3.31.0,
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# which lacked the workaround of ignoring CMP0156 unless this is enabled.
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if(POLICY CMP0179)
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cmake_policy(SET CMP0179 NEW)
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endif()
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endif()
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