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include(CheckCXXCompilerFlag)
include(CheckCXXSourceCompiles)
# Check for oneAPI compiler (some older CMake versions detect as Clang)
if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
check_cxx_source_compiles("#if (defined(__INTEL_CLANG_COMPILER) || defined(__INTEL_LLVM_COMPILER))
int main() { return 0; }
#else
not oneAPI
#endif" OPENMP_HAVE_ONEAPI_COMPILER)
if (OPENMP_HAVE_ONEAPI_COMPILER)
# According to CMake documentation, the compiler id should
# be IntelLLVM when detected oneAPI
set(CMAKE_C_COMPILER_ID "IntelLLVM")
set(CMAKE_CXX_COMPILER_ID "IntelLLVM")
endif()
endif()
check_cxx_compiler_flag(-Wall OPENMP_HAVE_WALL_FLAG)
check_cxx_compiler_flag(-Werror OPENMP_HAVE_WERROR_FLAG)
check_cxx_compiler_flag(-fcolor-diagnostics OPENMP_HAVE_COLOR_DIAGNOSTICS)
# Additional warnings that are not enabled by -Wall.
check_cxx_compiler_flag(-Wcast-qual OPENMP_HAVE_WCAST_QUAL_FLAG)
check_cxx_compiler_flag(-Wformat-pedantic OPENMP_HAVE_WFORMAT_PEDANTIC_FLAG)
check_cxx_compiler_flag(-Wimplicit-fallthrough OPENMP_HAVE_WIMPLICIT_FALLTHROUGH_FLAG)
check_cxx_compiler_flag(-Wsign-compare OPENMP_HAVE_WSIGN_COMPARE_FLAG)
# Warnings that we want to disable because they are too verbose or fragile.
# GCC silently accepts any -Wno-<foo> option, but warns about those options
# being unrecognized only if the compilation triggers other warnings to be
# printed. Therefore, check for whether the compiler supports options in the
# form -W<foo>, and if supported, add the corresponding -Wno-<foo> option.
check_cxx_compiler_flag(-Wenum-constexpr-conversion OPENMP_HAVE_WENUM_CONSTEXPR_CONVERSION_FLAG)
check_cxx_compiler_flag(-Wextra OPENMP_HAVE_WEXTRA_FLAG)
check_cxx_compiler_flag(-Wpedantic OPENMP_HAVE_WPEDANTIC_FLAG)
check_cxx_compiler_flag(-Wmaybe-uninitialized OPENMP_HAVE_WMAYBE_UNINITIALIZED_FLAG)
# Additional flags for optimizing created libraries.
check_cxx_compiler_flag(-fno-semantic-interposition OPENMP_HAVE_NO_SEMANTIC_INTERPOSITION)
check_cxx_compiler_flag(-ffunction-section OPENMP_HAVE_FUNCTION_SECTIONS)
check_cxx_compiler_flag(-fdata-sections OPENMP_HAVE_DATA_SECTIONS)
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