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