[CMake] Scope of a macro

[Robert Dailey]

On Wed, Mar 4, 2009 at 12:02 AM, Michael Wild <themiwi at gmail.com> wrote:

> If you add a subdirectory, it inherits all variables and macros from the
> parent directories. This is actually what one expects, otherwise you would
> have to repeat the whole system detection (find_pacakge, find_library,
> find_path etc.) in every subdirectory. The reverse, however is not true. By
> default, variables (I'm not sure about macros) don't propagate into the
> parent scope, unless one uses the PARENT_SCOPE option or adds the variable
> to the cache which makes it global.


That makes perfect sense and works as I would expect. However, I'm seeing
the behavior you state should not happen. That is, the macros defined in the
child directory are somehow propagating up to the parent.
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