About CMake Verbatim (replied from brad.king)

After I submitted the bug report about CMake Verbatim, brad.king replied that he had committed a new documentation about Verbatim, which reads:

If VERBATIM is given then all arguments to the commands will be
escaped properly for the build tool so that the invoked command
receives each argument unchanged. Note that one level of escapes is
still used by the CMake language processor before add_custom_command
even sees the arguments. Use of VERBATIM is recommended as it enables
correct behavior. When VERBATIM is not given the behavior is platform
specific because there is no protection of tool-specific special
characters.

Thanks, brad.king! Keep up the good work.