cb90d5b3ef
Some linkers do not require that libraries are repeated on the command line. The Apple linker emits warnings when duplicate libraries are specified, resulting in a wall of warnings. CMP0156 deduplicates libraries on the command line when the linker doesn't require them. This patch enables CMP0156 to quiet the warnings when using a version of CMake that recognizes it (CMake 3.29 and newer).
41 lines
1.4 KiB
CMake
41 lines
1.4 KiB
CMake
# CMake policy settings shared between LLVM projects
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# CMP0116: Ninja generators transform `DEPFILE`s from `add_custom_command()`
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# New in CMake 3.20. https://cmake.org/cmake/help/latest/policy/CMP0116.html
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if(POLICY CMP0116)
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cmake_policy(SET CMP0116 OLD)
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endif()
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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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endif()
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