diff options
| -rw-r--r-- | CMakeLists.txt | 17 | ||||
| -rw-r--r-- | Source/Checks/cm_cxx17_check.cmake | 36 | ||||
| -rw-r--r-- | Source/Checks/cm_cxx17_check.cpp | 7 |
3 files changed, 56 insertions, 4 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 945ae8d..e4d2a9a 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -64,11 +64,20 @@ if(NOT DEFINED CMAKE_CXX_STANDARD AND NOT CMake_NO_CXX_STANDARD) if (CMAKE_CXX_COMPILER_ID STREQUAL SunPro AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.14) set(CMAKE_CXX_STANDARD 98) else() - include(${CMake_SOURCE_DIR}/Source/Checks/cm_cxx14_check.cmake) - if(NOT CMake_CXX14_BROKEN) - set(CMAKE_CXX_STANDARD 14) + if(NOT CMAKE_VERSION VERSION_LESS 3.8) + include(${CMake_SOURCE_DIR}/Source/Checks/cm_cxx17_check.cmake) else() - set(CMAKE_CXX_STANDARD 11) + set(CMake_CXX17_BROKEN 1) + endif() + if(NOT CMake_CXX17_BROKEN) + set(CMAKE_CXX_STANDARD 17) + else() + include(${CMake_SOURCE_DIR}/Source/Checks/cm_cxx14_check.cmake) + if(NOT CMake_CXX14_BROKEN) + set(CMAKE_CXX_STANDARD 14) + else() + set(CMAKE_CXX_STANDARD 11) + endif() endif() endif() endif() diff --git a/Source/Checks/cm_cxx17_check.cmake b/Source/Checks/cm_cxx17_check.cmake new file mode 100644 index 0000000..83d3971 --- /dev/null +++ b/Source/Checks/cm_cxx17_check.cmake @@ -0,0 +1,36 @@ +set(CMake_CXX17_BROKEN 0) +if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang") + if(NOT CMAKE_CXX17_STANDARD_COMPILE_OPTION) + set(CMake_CXX17_WORKS 0) + endif() + if(NOT DEFINED CMake_CXX17_WORKS) + message(STATUS "Checking if compiler supports needed C++17 constructs") + try_compile(CMake_CXX17_WORKS + ${CMAKE_CURRENT_BINARY_DIR} + ${CMAKE_CURRENT_LIST_DIR}/cm_cxx17_check.cpp + CMAKE_FLAGS -DCMAKE_CXX_STANDARD=17 + OUTPUT_VARIABLE OUTPUT + ) + if(CMake_CXX17_WORKS AND "${OUTPUT}" MATCHES "error: no member named.*gets.*in the global namespace") + set_property(CACHE CMake_CXX17_WORKS PROPERTY VALUE 0) + endif() + if(CMake_CXX17_WORKS) + message(STATUS "Checking if compiler supports needed C++17 constructs - yes") + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log + "Determining if compiler supports needed C++17 constructs passed with the following output:\n" + "${OUTPUT}\n" + "\n" + ) + else() + message(STATUS "Checking if compiler supports needed C++17 constructs - no") + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log + "Determining if compiler supports needed C++17 constructs failed with the following output:\n" + "${OUTPUT}\n" + "\n" + ) + endif() + endif() + if(NOT CMake_CXX17_WORKS) + set(CMake_CXX17_BROKEN 1) + endif() +endif() diff --git a/Source/Checks/cm_cxx17_check.cpp b/Source/Checks/cm_cxx17_check.cpp new file mode 100644 index 0000000..2cbf1d5 --- /dev/null +++ b/Source/Checks/cm_cxx17_check.cpp @@ -0,0 +1,7 @@ +#include <cstdio> +#include <unordered_map> + +int main() +{ + return 0; +} |