CSFLAGS

Preferred executable for compiling CSharp language files. Will only be used by CMake on the first configuration to determine CSharp default compilation flags, after which the value for CSFLAGS is stored in the cache as CMAKE_CSharp_FLAGS. For any configuration run (including the first), the environment variable will be ignored if the CMAKE_CSharp_FLAGS variable is defined.

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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.11/envvar/CSFLAGS.html