| # Enable scanning by default for targets that explicitly use C++ 20. |
| cmake_policy(SET CMP0155 NEW) |
| |
| # Block making C++ `import std` targets. |
| add_library(__CMAKE::CXX23 IMPORTED INTERFACE) |
| |
| # Force CMAKE_CXX_STANDARD_DEFAULT to be C++ 20. |
| set(ENV{CXXFLAGS} "$ENV{CXXFLAGS} ${CMAKE_CXX20_STANDARD_COMPILE_OPTION}") |
| enable_language(CXX) |
| |
| # Hide any real scanning rule that may be available. |
| unset(CMAKE_CXX_SCANDEP_SOURCE) |
| |
| # Create a target that does not explicitly use C++ 20 to verify it works |
| # without any scanning rule available. |
| add_executable(cmp0155-new sources/module-use.cxx) |
