FindFLEX and CACHE INTERNAL

[ben.boeckel (Ben Boeckel (Kitware))]

@EosPengwern

FindFLEX sets FLEX_INCLUDE_DIRS as a non-cache variable;

Looks like it does.

@EosPengwern

I’m then setting it as a cache variable (because I want to use it globally without having to promote it up a couple of levels using PARENT_SCOPE)

find_package is scoped. Unless you set the targets’ GLOBAL property, they don’t really do much to parent scopes (except function and macro definitions…those are always global).

@EosPengwern

But when I try to access the variable normally using ${FLEX_INCLUDE_DIRS}, I’m seeing the non-cache variable defined by FindFLEX, rather than the cache variable I defined myself?

If you’re in the same scope and after the find_package call, yes.

@EosPengwern

But am I on the right track?

To understanding, yes. To a fix…I think the find_package call just needs to be called in a high enough scope that anything that wants to use it is “after” it and under a relevant directory.