CMake Error at WrongArguments.cmake:[0-9]+ \(add_custom_target\): Error evaluating generator expression: \$<PATH_EQUAL> \$<PATH_EQUAL> expression requires 2 comma separated parameters, but got 0 instead. Call Stack \(most recent call first\): CMakeLists.txt:[0-9]+ \(include\) CMake Error at WrongArguments.cmake:[0-9]+ \(add_custom_target\): Error evaluating generator expression: \$<PATH_EQUAL:> \$<PATH_EQUAL> expression requires 2 comma separated parameters, but got 1 instead. Call Stack \(most recent call first\): CMakeLists.txt:[0-9]+ \(include\) CMake Error at WrongArguments.cmake:2 \(add_custom_target\): Error evaluating generator expression: \$<PATH_EQUAL:,,> \$<PATH_EQUAL> expression requires 2 comma separated parameters, but got 3 instead. Call Stack \(most recent call first\): CMakeLists.txt:[0-9]+ \(include\) CMake Error at WrongArguments.cmake:[0-9]+ \(add_custom_target\): Error evaluating generator expression: \$<PATH_EQUAL:something,,> \$<PATH_EQUAL> expression requires 2 comma separated parameters, but got 3 instead. Call Stack \(most recent call first\): CMakeLists.txt:[0-9]+ \(include\)