| include(${CMAKE_CURRENT_LIST_DIR}/cm_message_checks_compat.cmake) |
| |
| function(cm_check_cxx_feature name) |
| set(TRY_RUN_FEATURE "${ARGN}") |
| string(TOUPPER ${name} FEATURE) |
| if(NOT DEFINED CMake_HAVE_CXX_${FEATURE}) |
| cm_message_checks_compat( |
| "Checking if compiler supports C++ ${name}" |
| __checkStart __checkPass __checkFail) |
| message(${__checkStart}) |
| if(CMAKE_CXX_STANDARD) |
| set(maybe_cxx_standard -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}) |
| else() |
| set(maybe_cxx_standard "") |
| endif() |
| if (TRY_RUN_FEATURE) |
| try_run(CMake_RUN_CXX_${FEATURE} CMake_COMPILE_CXX_${FEATURE} |
| ${CMAKE_CURRENT_BINARY_DIR} |
| ${CMAKE_CURRENT_LIST_DIR}/cm_cxx_${name}.cxx |
| CMAKE_FLAGS ${maybe_cxx_standard} |
| OUTPUT_VARIABLE OUTPUT |
| ) |
| if (CMake_RUN_CXX_${FEATURE} EQUAL "0" AND CMake_COMPILE_CXX_${FEATURE}) |
| set(CMake_HAVE_CXX_${FEATURE} ON CACHE INTERNAL "TRY_RUN" FORCE) |
| else() |
| set(CMake_HAVE_CXX_${FEATURE} OFF CACHE INTERNAL "TRY_RUN" FORCE) |
| endif() |
| else() |
| try_compile(CMake_HAVE_CXX_${FEATURE} |
| ${CMAKE_CURRENT_BINARY_DIR} |
| ${CMAKE_CURRENT_LIST_DIR}/cm_cxx_${name}.cxx |
| CMAKE_FLAGS ${maybe_cxx_standard} |
| OUTPUT_VARIABLE OUTPUT |
| ) |
| endif() |
| set(check_output "${OUTPUT}") |
| # Filter out MSBuild output that looks like a warning. |
| string(REGEX REPLACE " +0 Warning\\(s\\)" "" check_output "${check_output}") |
| # Filter out MSBuild output that looks like a warning. |
| string(REGEX REPLACE "[^\n]*warning MSB[0-9][0-9][0-9][0-9][^\n]*" "" check_output "${check_output}") |
| # Filter out warnings caused by user flags. |
| string(REGEX REPLACE "[^\n]*warning:[^\n]*-Winvalid-command-line-argument[^\n]*" "" check_output "${check_output}") |
| # Filter out warnings caused by local configuration. |
| string(REGEX REPLACE "[^\n]*warning:[^\n]*directory not found for option[^\n]*" "" check_output "${check_output}") |
| string(REGEX REPLACE "[^\n]*warning:[^\n]*object file compiled with -mlong-branch which is no longer needed[^\n]*" "" check_output "${check_output}") |
| # Filter out other warnings unrelated to feature checks. |
| string(REGEX REPLACE "[^\n]*warning:[^\n]*sprintf\\(\\) is often misused, please use snprintf[^\n]*" "" check_output "${check_output}") |
| # Filter out libhugetlbfs warnings. |
| string(REGEX REPLACE "[^\n]*libhugetlbfs [^\n]*: WARNING[^\n]*" "" check_output "${check_output}") |
| # Filter out xcodebuild warnings. |
| string(REGEX REPLACE "[^\n]* xcodebuild\\[[0-9]*:[0-9]*\\][^\n]*[Ww]arning: [^\n]*" "" check_output "${check_output}") |
| # Filter out icpc warnings |
| string(REGEX REPLACE "[^\n]*icpc: command line warning #10121: overriding [^\n]*" "" check_output "${check_output}") |
| # Filter out ld warnings. |
| string(REGEX REPLACE "[^\n]*ld: warning: [^\n]*" "" check_output "${check_output}") |
| # If using the feature causes warnings, treat it as broken/unavailable. |
| if(check_output MATCHES "(^|[ :])[Ww][Aa][Rr][Nn][Ii][Nn][Gg]") |
| set(CMake_HAVE_CXX_${FEATURE} OFF CACHE INTERNAL "TRY_COMPILE" FORCE) |
| endif() |
| if(CMake_HAVE_CXX_${FEATURE}) |
| message(${__checkPass} "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(${__checkFail} "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) |
| if (NOT CMAKE_CXX_STANDARD LESS "17") |
| if (NOT CMAKE_CROSSCOMPILING OR CMAKE_CROSSCOMPILING_EMULATOR) |
| cm_check_cxx_feature(filesystem TRY_RUN) |
| else() |
| # In cross-compiling mode, it is not possible to check implementation bugs |
| # so rely only on conformance done by compilation |
| cm_check_cxx_feature(filesystem) |
| endif() |
| else() |
| set(CMake_HAVE_CXX_FILESYSTEM FALSE) |
| endif() |