CMake Error at TRANSFORM-selector-REGEX-no-arguments.cmake:[0-9]+ \(file\):
  Error evaluating generator expression:

    \$<LIST:TRANSFORM,a;b,TOUPPER,REGEX>

  sub-command TRANSFORM, selector REGEX expects 'regular expression'
  argument.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)