CMake Custom Command copy multiple files

Copying multiple files is available from CMake 3.5

cmake -E copy <file>... <destination>

"cmake -E copy" support for multiple files

Command-Line Tool Mode

I did it with a loop

# create a list of files to copy
set( THIRD_PARTY_DLLS
   C:/DLLFOLDER/my_dll_1.dll
   C:/DLLFOLDER/my_dll_2.dll
)

# do the copying
foreach( file_i ${THIRD_PARTY_DLLS})
    add_custom_command(
    TARGET ${VIEWER_NAME}
    POST_BUILD
    COMMAND ${CMAKE_COMMAND}
    ARGS -E copy ${file_i} "C:/TargetDirectory"
)
endforeach( file_i )