Hi Frederic, So, I re-built Fedora packages and found that the patch I mentioned above is actually creating a new dependency on packages that use automake:
It's so frustrating. The original tarball is (presumably) entirely correct but the playing with pretend mtimes causes timestamp problems. Does not seem surprising. Debian also reported this, but I never saw any clear explanation as to why it was happening. Anyway, here is my guess: you set SOURCE_DATE_EPOCH to the spec file mtime, per Carlos. If that mtime is newer than the mtime of the .info files, well, make will think they need to be recreated. Even though the mtime of the .texi file is, presumably, older than the spec file, it's been forced to be considered newer. In other words, you've forced the texi file to be considered to have the same mtime as the spec file, and that might well be newer than the previously-generated (years and years ago) info files. I don't know if that's what's really happening. Can you investigate please? And if it is, I don't know what to do about it :(. Maybe making mdate-sh aware of SOURCE_DATE_EPOCH was a wrong idea :(. Thanks, Karl