not renaming the package and modifying pkgrel can indeed lead me to confusion, but it's just personal compilation. ok : good practices you encourage ;-)
version 6.1.20 has just been downloaded and will be soon in place but my question remains : how to target 6.1.15 when evolving under 6.x.y (or 6.1.z) ? virtual machine (this is what I use to get around the problem but it seems pretty heavy) ? "cross" compilation ? make parameters ? environment variables ?
thank you for these precisions which unfortunately do not enlighten me much :-(
regards, lacsaP.