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# CMake detects Intel compiler (based on LLVM) as Clang
# Was fixed in Cmake 3.20. When we require 3.20 this can be deleted.
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM")
  try_compile(GMX_INTEL_LLVM "${CMAKE_BINARY_DIR}" SOURCES "${CMAKE_SOURCE_DIR}/cmake/TestIntelLLVM.cpp" OUTPUT_VARIABLE GMX_INTEL_LLVM_VERSION)
  if (GMX_INTEL_LLVM)
    if(GMX_INTEL_LLVM_VERSION MATCHES ": ([0-9]+) ")
      set(GMX_INTEL_LLVM_VERSION ${CMAKE_MATCH_1})
    else()
      message(WARNING "Intel LLVM version detection failed. Output: ${GMX_INTEL_LLVM_VERSION}")
    endif()
  endif()
endif()