Change Details

At the end of src/CMakeLists.txt, add the following line: `add_cxx_compiler_flag(-foo)` Then run: mkdir buildcmake && cd buildcmake cmake -GNinja .. ninja -v Before the patch: CMake will output a `Performing Test FLAG_IS_SUPPORTED - Success` line and the `-foo` option will be added on the command lines, leading to a build failure. After the patch: CMake will output a `Performing Test foo_is_supported - Failed` line for the `-foo` option and it will not be added on the command lines.

At the end of src/CMakeLists.txt, add the following line: `add_cxx_compiler_flag(-foo)` Then run: mkdir buildcmake && cd buildcmake cmake -GNinja .. ninja -v Before the patch: CMake will output a `Performing Test FLAG_IS_SUPPORTED - Success` line and the `-foo` option will be added on the command lines, leading to a build failure. After the patch: CMake will output a `Performing Test have_cxx_foo - Failed` line for the `-foo` option and it will not be added on the command lines.

At the end of src/CMakeLists.txt, add the following line: `add_cxx_compiler_flag(-foo)` Then run: mkdir buildcmake && cd buildcmake cmake -GNinja .. ninja -v Before the patch: CMake will output a `Performing Test FLAG_IS_SUPPORTED - Success` line and the `-foo` option will be added on the command lines, leading to a build failure. After the patch: CMake will output a `Performing Test foo_is_supportedhave_cxx_foo - Failed` line for the `-foo` option and it will not be added on the command lines.