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Brad King authored
Users can create it through an explicit command-line option if desired. Initializing the variable as an empty cache entry can wipe out a normal variable of the same name that may have been set by a toolchain file. Since commit v3.8.0-rc1~261^2~11 (CUDA: Use the host compiler for linking CUDA executables and shared libs, 2016-09-19) we save the value of `CMAKE_CUDA_HOST_COMPILER` persistently in the compiler information file as a normal variable. Fixes: #17935
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