Problems with caching

[drodin]

There is a general problem, which I'll try to illustrate with an example.

After recent altering of CMAKE_ARGS for 'opusfile' package d061f8d

I have a problem with testing of 'SDL_mixer' package, which is dependent on 'opusfile' one
Tests are failing for all systems for which cache had been uploaded https://github.com/drodin/hunter/actions/runs/992722405
Sample of error: https://github.com/drodin/hunter/runs/2969916903?check_suite_focus=true#step:7:8164

-- [hunter *** DEBUG *** 2021-07-02T07:01:08] Package installed from cache: opusfile
...
  Imported target "opusfile::opusfile" includes non-existent path

Problem goes away if I disable cache server by adding set(HUNTER_USE_CACHE_SERVERS NO) to examples/SDL_mixer/CMakeLists.txt drodin@1ad3543
Testing goes successful, as 'opusfile' package is built from source
https://github.com/drodin/hunter/actions/runs/992745793

[NeroBurner]

I haven't looked, but I suspect, that opsufile generates a non-relocatable opusfile-config.cmake file. This means some paths in the config file are absolute paths, which causes isses, because the cache-directory isn't the same on all the machines.

I propose to fix the opusfile package