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334522ca58
Add a new CMake file to expand on for more problematic configurations in the future. Related to #54645 Reviewed By: beanz, phosek, smeenai Differential Revision: https://reviews.llvm.org/D123777
20 lines
945 B
CMake
20 lines
945 B
CMake
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option(LLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS OFF "Set this option to ON to allow problematic toolchain configurations. Use on your own risk.")
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macro(log_problematic MESSAGE)
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if(LLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS)
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message(WARNING "${MESSAGE}")
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else()
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message(FATAL_ERROR "${MESSAGE}\nYou can force usage of this configuration by passing -DLLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS=ON")
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endif()
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endmacro()
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# MSVC and /arch:AVX is untested and have created problems before. See:
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# https://github.com/llvm/llvm-project/issues/54645
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if(${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
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string(TOLOWER "${CMAKE_CXX_FLAGS} ${CMAKE_C_FLAGS}" _FLAGS)
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if(_FLAGS MATCHES "/arch:avx[0-9]*")
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log_problematic("Compiling LLVM with MSVC and the /arch:AVX flag is known to cause issues with parts of LLVM.\nSee https://github.com/llvm/llvm-project/issues/54645 for details.\nUse clang-cl if you want to enable AVX instructions.")
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endif()
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endif()
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