| CMake Error at NonValidTarget-C_COMPILER_VERSION.cmake:1 \(add_custom_command\): | |
| Error evaluating generator expression: | |
| \$<C_COMPILER_VERSION> | |
| \$<C_COMPILER_VERSION> may only be used with binary targets. It may not be | |
| used with add_custom_command or add_custom_target. | |
| Call Stack \(most recent call first\): | |
| CMakeLists.txt:3 \(include\) |