[trulyrandom]

This requires a more comprehensive redesign of the build process. Most Linux distributions also run the tests of the project they're building as part of the build process.

[uecker]

The code that runs during testing should not be allowed to affect the package though. If this is possible, this is misdesigned.

[saulrh]

Profile guided optimization is, unfortunately, wildly powerful. And it has a hard requirement that a casual link exists from test data (or production data!) to the build process.