Subject: bug#59288: Makefile grows huge due to repeated lines Thanks for the report.
I bisected the problem to https://git.savannah.gnu.org/cgit/automake.git/commit/?id=08849db866b44510f6b8fd49e313c91a43a3dfd3 And even more so for that. "The 628 number is curious. It seems to be the number of lib source files times two!" Interesting. Easy to understand. Repro steps: I'll make sure it reproduces for me. I have no idea offhand what to do about it, but I'll look into it as soon as I can, unless by some miracle someone else gets interested in automake maintenance ... Thanks again, Karl