(CMake Error at BadCommand.cmake:1 \(add_custom_target\): Error evaluating generator expression: \$<OUTPUT_CONFIG:a> Expression did not evaluate to a known generator expression Call Stack \(most recent call first\): CMakeLists.txt:3 \(include\) )+(CMake Error at BadCommand.cmake:1 \(add_custom_target\): Error evaluating generator expression: \$<COMMAND_CONFIG:b> Expression did not evaluate to a known generator expression Call Stack \(most recent call first\): CMakeLists.txt:3 \(include\) )+