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Fix old versions of CMake erroneously reporting

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Intel LLVM as Clang

Fixes #4315
This commit is contained in:
Tobias Markus 2024-05-14 11:27:20 +02:00
parent 33af80a883
commit c6346a12ac
1 changed files with 15 additions and 2 deletions
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17
googletest/cmake/internal_utils.cmake
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@ -96,10 +96,23 @@ macro(config_compiler_and_linker)
set(cxx_no_exception_flags "-fno-exceptions")
set(cxx_strict_flags "-W -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wunused-parameter -Wcast-align -Winline -Wredundant-decls")
set(cxx_no_rtti_flags "-fno-rtti")
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
# CMake versions less than 3.20 will erroneously report
# IntelLLVM compilers as clang. Therefore we check if
# we're really dealing with IntelLLVM as compiler.
# See https://github.com/google/googletest/issues/4315
set(compiler_is_really_intel_llvm FALSE)
if (${CMAKE_VERSION} VERSION_LESS 3.20)
string(FIND "${CMAKE_CXX_COMPILER}" "icpx" icpx_position)
if (icpx_position GREATER -1)
set(compiler_is_really_intel_llvm TRUE)
endif()
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT compiler_is_really_intel_llvm)
set(cxx_strict_flags "${cxx_strict_flags} -Wchar-subscripts")
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
if (CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM" OR compiler_is_really_intel_llvm)
set(cxx_base_flags "${cxx_base_flags} -Wno-implicit-float-size-conversion -ffp-model=precise")
endif()
elseif (CMAKE_COMPILER_IS_GNUCXX)