* Buildcache:
* Try mocking an install of quux, corge and garply using prebuilt binaries
* Put patchelf install after ccache restore
* Add script to install patchelf from source so it can be used on Ubuntu:Trusty which does not have a patchelf pat package. The script will skip building on macOS
* Remove mirror at end of bindist test
* Add patchelf to Ubuntu build env
* Revert mock patchelf package to allow other tests to run.
* Remove depends_on('patchelf', type='build') relying instead on
* Test fixture to ensure patchelf is available.
* Call g++ command to build libraries directly during test build
* Flake8
* Install patchelf in before_install stage using apt unless on Trusty where a build is done.
* Add some symbolic links between packages
* Flake8
* Flake8:
* Update mock packages to write their own source files
* Create the stage because spec search does not create it any longer
* updates after change of list command arguments
* cleanup after merge
* flake8
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