cuda requires gcc-5 or less by testing value of ALTERNATE_HOST_COMPILER which is /usr/bin/gcc.  By setting ALTERNATE_HOST_COMPILER to gcc-5 CUDA can use gcc-5 in systems where default /usr/bin/gcc is gcc-7
cuda requires gcc-5 or less by testing value of ALTERNATE_HOST_COMPILER which is /usr/bin/gcc.  By setting ALTERNATE_HOST_COMPILER to gcc-5 CUDA can use gcc-5 in systems where default /usr/bin/gcc is gcc-7

ROCm-Developer-Tools/hcc2,ROCm-Developer-Tools/hcc2,ROCm-Developer-Tools/hcc2