[CMake] INCLUDE_DIRECTORIES and UNIX style separated environment variables

[BlinkEye]

Hi guys

I'm not able to convince cmake to properly use an environment variable which
consists of more than one entry for the INCLUDE_DIRECTORIES directive. It always
takes the value as it is:

Passing

MY_SPECIAL_INCLUDE32=/foo/bar/32bit/include:/foo/bar/include

to INCLUDE_DIRECTORIES like

INCLUDE_DIRECTORIES( "$ENV{MY_SPECIAL_INCLUDE32}" )

results in

/usr/bin/c++ -I/foo/bar/32bit/include:/foo/bar/include ...

instead of

/usr/bin/c++ -I/foo/bar/32bit/include -I/foo/bar/include ...

The same applies for LINK_DIRECTORIES but this seems not to matter for the rpath
command.

I tried to use TO_CMAKE_PATH with no avail.

Any ideas?