xref: /llvm-project/openmp/cmake/config-ix.cmake (revision 15279e7569108cccb49ca1fcfdfae420124d3fac) 
1include(CheckCXXCompilerFlag)
2include(CheckCXXSourceCompiles)
3
4# Check for oneAPI compiler (some older CMake versions detect as Clang)
5if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
6  check_cxx_source_compiles("#if (defined(__INTEL_CLANG_COMPILER) || defined(__INTEL_LLVM_COMPILER))
7                             int main() { return 0; }
8                             #else
9                             not oneAPI
10                             #endif" OPENMP_HAVE_ONEAPI_COMPILER)
11  if (OPENMP_HAVE_ONEAPI_COMPILER)
12    # According to CMake documentation, the compiler id should
13    # be IntelLLVM when detected oneAPI
14    set(CMAKE_C_COMPILER_ID "IntelLLVM")
15    set(CMAKE_CXX_COMPILER_ID "IntelLLVM")
16  endif()
17endif()
18
19check_cxx_compiler_flag(-Wall OPENMP_HAVE_WALL_FLAG)
20check_cxx_compiler_flag(-Werror OPENMP_HAVE_WERROR_FLAG)
21check_cxx_compiler_flag(-fcolor-diagnostics OPENMP_HAVE_COLOR_DIAGNOSTICS)
22
23# Additional warnings that are not enabled by -Wall.
24check_cxx_compiler_flag(-Wcast-qual OPENMP_HAVE_WCAST_QUAL_FLAG)
25check_cxx_compiler_flag(-Wformat-pedantic OPENMP_HAVE_WFORMAT_PEDANTIC_FLAG)
26check_cxx_compiler_flag(-Wimplicit-fallthrough OPENMP_HAVE_WIMPLICIT_FALLTHROUGH_FLAG)
27check_cxx_compiler_flag(-Wsign-compare OPENMP_HAVE_WSIGN_COMPARE_FLAG)
28
29# Warnings that we want to disable because they are too verbose or fragile.
30
31# GCC silently accepts any -Wno-<foo> option, but warns about those options
32# being unrecognized only if the compilation triggers other warnings to be
33# printed. Therefore, check for whether the compiler supports options in the
34# form -W<foo>, and if supported, add the corresponding -Wno-<foo> option.
35
36check_cxx_compiler_flag(-Wextra OPENMP_HAVE_WEXTRA_FLAG)
37check_cxx_compiler_flag(-Wpedantic OPENMP_HAVE_WPEDANTIC_FLAG)
38check_cxx_compiler_flag(-Wmaybe-uninitialized OPENMP_HAVE_WMAYBE_UNINITIALIZED_FLAG)
39
40# Additional flags for optimizing created libraries.
41
42check_cxx_compiler_flag(-fno-semantic-interposition OPENMP_HAVE_NO_SEMANTIC_INTERPOSITION)
43check_cxx_compiler_flag(-ffunction-section OPENMP_HAVE_FUNCTION_SECTIONS)
44check_cxx_compiler_flag(-fdata-sections OPENMP_HAVE_DATA_SECTIONS)
45