[cmake-developers] install(DIRECTORY) genex support

[Tim Blechmann]

hi all,

i wonder, is there any reason for not supporting generator expressions
for install(DIRECTORY)? i need this functionality to be able to install
dSYM folders which are generated by xcode.

if not, could someone review/merge this patch [1]? it is probably too
late for 3.1, right?

thanks a lot,
tim

[1] https://github.com/Kitware/CMake/pull/124