[CMake] INSTALL(CODE ...)

[Christian Lang]

Hello,

I want to add some custom install code via INSTALL(CODE <code>). How can 
I set variables inside such a INSTALL(CODE ...) statement? I tried 
something like

INSTALL(CODE "
  SET(DATE \"today\")
  MESSAGE(\"Date = \" ${DATE})
")

The output is "Date =" and not "Date = today". It seems like one cannot 
set variables this way. Does anybody know where my mistake is?

Thanks a lot,
Christian Lang