[cmake-developers] [Review request] Topic FindPkgConfig_Extend-PKG_CONFIG_PATH

[Brad King]

On 03/11/2014 10:43 AM, Daniele E. Domenichelli wrote:
> It is a quite common use case to get and set "path" environment

It is not very common within CMake's own modules:

 $ git grep TO_NATIVE_PATH v3.0.0-rc1 -- Modules |wc -l
 2
 $ git grep TO_CMAKE_PATH v3.0.0-rc1 -- Modules |wc -l
 24
 # (and 6 of these are in one module)

We don't like to have behavior depend on environment variables more
than necessary.  They may not still be set when CMake re-runs inside
the build system.  That is one reason we CACHE the find results.
Setting an environment variable for a tool that runs under CMake
is a pretty special case in this topic.

-Brad