cmake -E copy with wildcards and build time variable

I want to have a macro to copy files looking like this:

MACRO(POST_BUILD_COPY src_files dest_path)
    ADD_CUSTOM_COMMAND(TARGET ${PROJECT_NAME} POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy ${src_files} ${dest_path})
ENDMACRO(POST_BUILD_COPY src_files dest_path)

This is perfectly fine in most cases. My problem is that src_files can be something like path/to/${CMAKE_CFG_INTDIR}/headers/*.h.

The problems are

• cmake -E copy (nor copy_directory) does not seem to be able to handle the wildcard
• file(GLOB files ${src_files}) resolves to an empty array since it is evaluated at the configuration time and ${CMAKE_CFG_INTDIR} is a build time variable (which is for example $(Configuration) for msvc)

Is there a cmake way to tackle this problem that I am missing ? I do not want to rely on external tools (this is what we do right now, and it leads to other issues we want to get rid of)