New in version 3.19.
This is a CMake Environment Variable. Its initial value is taken from the calling process environment.
Default compilation flags to be used when compiling
ISPC files. Will only be used by CMake on the first configuration to determine
ISPC default compilation flags, after which the value for
ISPCFLAGS is stored in the cache as CMAKE_ISPC_FLAGS. For any configuration run (including the first), the environment variable will be ignored if the CMAKE_ISPC_FLAGS variable is defined.
See also CMAKE_ISPC_FLAGS_INIT.
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