| |
| function(cm_check_cxx_feature name) |
| string(TOUPPER ${name} FEATURE) |
| if(NOT DEFINED CMake_HAVE_CXX_${FEATURE}) |
| message(STATUS "Checking if compiler supports C++ ${name}") |
| if(CMAKE_CXX_STANDARD) |
| set(maybe_cxx_standard -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}) |
| else() |
| set(maybe_cxx_standard "") |
| endif() |
| try_compile(CMake_HAVE_CXX_${FEATURE} |
| ${CMAKE_CURRENT_BINARY_DIR} |
| ${CMAKE_CURRENT_LIST_DIR}/cm_cxx_${name}.cxx |
| CMAKE_FLAGS ${maybe_cxx_standard} |
| OUTPUT_VARIABLE OUTPUT |
| ) |
| set(check_output "${OUTPUT}") |
| # Filter out MSBuild output that looks like a warning. |
| string(REGEX REPLACE " +0 Warning\\(s\\)" "" check_output "${check_output}") |
| # Filter out warnings caused by user flags. |
| string(REGEX REPLACE "[^\n]*warning:[^\n]*-Winvalid-command-line-argument[^\n]*" "" check_output "${check_output}") |
| # If using the feature causes warnings, treat it as broken/unavailable. |
| if(check_output MATCHES "[Ww]arning") |
| set(CMake_HAVE_CXX_${FEATURE} OFF CACHE INTERNAL "TRY_COMPILE" FORCE) |
| endif() |
| if(CMake_HAVE_CXX_${FEATURE}) |
| message(STATUS "Checking if compiler supports C++ ${name} - yes") |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Determining if compiler supports C++ ${name} passed with the following output:\n" |
| "${OUTPUT}\n" |
| "\n" |
| ) |
| else() |
| message(STATUS "Checking if compiler supports C++ ${name} - no") |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Determining if compiler supports C++ ${name} failed with the following output:\n" |
| "${OUTPUT}\n" |
| "\n" |
| ) |
| endif() |
| endif() |
| endfunction() |
| |
| cm_check_cxx_feature(make_unique) |
| if(CMake_HAVE_CXX_MAKE_UNIQUE) |
| set(CMake_HAVE_CXX_UNIQUE_PTR 1) |
| endif() |
| cm_check_cxx_feature(unique_ptr) |