CMake uses this environment variable value, in combination with its own | |
builtin default flags for the toolchain, to initialize and store the | |
|CMAKE_LANG_FLAGS| cache entry. | |
This occurs the first time a build tree is configured for language |LANG|. | |
For any configuration run (including the first), the environment variable | |
will be ignored if the |CMAKE_LANG_FLAGS| variable is already defined. |