File: CheckProblematicConfigurations.cmake

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (19 lines) | stat: -rw-r--r-- 945 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 

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()