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Check if the compiler supports std::filesystem #779

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Merged
kris-rowe merged 2 commits into from
Jun 5, 2025
Merged

Check if the compiler supports std::filesystem #779

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abe5347
Set "-fno-strict-aliasing" in SetCompilerFlags.cmake
thilinarmtb Feb 28, 2025
4e4027e
Check for `std::filesystem` support
thilinarmtb Feb 28, 2025
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8 changes: 2 additions & 6 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,8 @@ set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

include(CheckRequiredCompilerFeatures)

set(CMAKE_POSITION_INDEPENDENT_CODE ON)

option(OCCA_ENABLE_OPENMP "Build with OpenMP if available" ON)
Expand Down Expand Up @@ -80,12 +82,6 @@ if (OCCA_CLANG_BASED_TRANSPILER)
endif()

include(SetCompilerFlags)
include(CheckCXXCompilerFlag)

check_cxx_compiler_flag("-fno-strict-aliasing" COMPILER_SUPPORTS_NO_STRICT_ALIASING)
if(COMPILER_SUPPORTS_NO_STRICT_ALIASING)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-strict-aliasing")
endif()

string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UPPER)
message("-- System : ${CMAKE_SYSTEM}")
Expand Down
15 changes: 15 additions & 0 deletions cmake/CheckRequiredCompilerFeatures.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
include(CheckCXXCompilerFlag)

check_cxx_source_compiles("
#include <filesystem>

namespace fs = std::filesystem;

int main(int argc, char *argv[]) {
return 0;
}
" HAS_FILE_SYSTEM)

if (NOT HAS_FILE_SYSTEM)
message(FATAL_ERROR "CXX compiler doesn't have std::filesystem support !")
endif()
5 changes: 5 additions & 0 deletions cmake/SetCompilerFlags.cmake
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Expand Up @@ -87,3 +87,8 @@ if (OCCA_ENABLE_FORTRAN)
set_optional_fortran_flag(SUPPORTED_WNO_INTEGER_DIVISION_Fortran_FLAGS "-Wno-integer-division")

endif()

check_cxx_compiler_flag("-fno-strict-aliasing" COMPILER_SUPPORTS_NO_STRICT_ALIASING)
if(COMPILER_SUPPORTS_NO_STRICT_ALIASING)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-strict-aliasing")
endif()