| CXXFLAGS | |
| -------- | |
| .. include:: ENV_VAR.txt | |
| Default compilation flags to be used when compiling ``CXX`` (C++) files. Will | |
| only be used by CMake on the first configuration to determine ``CXX`` default | |
| compilation flags, after which the value for ``CXXFLAGS`` is stored in the cache | |
| as :variable:`CMAKE_CXX_FLAGS <CMAKE_<LANG>_FLAGS>`. For any configuration run ( | |
| including the first), the environment variable will be ignored if | |
| the :variable:`CMAKE_CXX_FLAGS <CMAKE_<LANG>_FLAGS>` variable is defined. |