| |
| option(LLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS OFF "Set this option to ON to allow problematic toolchain configurations. Use on your own risk.") |
| |
| macro(log_problematic MESSAGE) |
| if(LLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS) |
| message(WARNING "${MESSAGE}") |
| else() |
| message(FATAL_ERROR "${MESSAGE}\nYou can force usage of this configuration by passing -DLLVM_ALLOW_PROBLEMATIC_CONFIGURATIONS=ON") |
| endif() |
| endmacro() |
| |
| # MSVC and /arch:AVX is untested and have created problems before. See: |
| # https://github.com/llvm/llvm-project/issues/54645 |
| if(${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC) |
| string(TOLOWER "${CMAKE_CXX_FLAGS} ${CMAKE_C_FLAGS}" _FLAGS) |
| if(_FLAGS MATCHES "/arch:avx[0-9]*") |
| 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.") |
| endif() |
| endif() |
