# HIPFLAGS

New in version 3.21.

This is a CMake Environment Variable. Its initial value is taken from the calling process environment.

Default compilation flags to be used when compiling `HIP` files. Will only be used by CMake on the first configuration to determine `HIP` default compilation flags, after which the value for `HIPFLAGS` is stored in the cache as `CMAKE_HIP_FLAGS`. For any configuration run (including the first), the environment variable will be ignored if the `CMAKE_HIP_FLAGS` variable is defined.

See also `CMAKE_HIP_FLAGS_INIT`.