[CMake] Adding custom directories to PATH enviroment

[Gabriele Greco]

Hi,

I've started using cmake on my projects since a few weeks so I'm still a
beginner.

The system works very well I only have a problem.

I need to have a directory inside the project tree included in the command
search path (the enviroment variable PATH).

I tried with:

set(ENV{PATH} "${PROJECT_SOURCE_DIR}/ext_bin/DFC:$ENV{PATH}")

but as I found googling around this command works only in the "cmake" stage,
but not on the generated makefiles.

There is a way to tell CMake to make a change to an enviroment variable that
is effective also inside the generated makefiles?

-- 
Gabriele Greco, DARTS Engineering
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