Well... I had managed to get myself confused. In fairness, some of the clues I was getting were misleading (at best).
TL;DR: After rebuilding a few packages, re-installing them, finding that that didn't help, then force-re-installing the most recently-built package for dns/libidn (libidn-1.38_1; package built 24 January), ghostscript stopped whining and printing started working again. The clue to try that came when I figured I would try to bypass cups, and just feed a Postscript file to lpd. I happened to have a bunch of PDFs around, so I tried: albert(14.0-S)[14] pdf2ps pdf/bike.pdf >/tmp/bike.ps ld-elf.so.1: /usr/local/lib/libidn.so.12: version LIBIDN_1.0 required by /usr/local/lib/libgs.so.10 not defined Oh. So I forced a rebuild & re-install of print/ghostscript10 (after determining that /usr/local/lib/libgs.so.10 is provided by that package). Tried `pdf2ps` again; same failure. Tried a few other packages (including print/cups) that got rebuilt when I told poudriere to just rebuild print/ghostscript10). Same failure. Noted that /usr/local/lib/libidn.so.12 comes from dns/libidn, so I forced a re-install of that... and that instantiation of the issue appears to be resolved. Now, given that this type of failure can occur: * I know how to check for missing libraries. How can I (similarly) check for an executable or library that needs some symbol or version that "is not defined"? I managed to "get lucky" and trigger something that actually provided a reasonably clear error message -- this time. Until I did that, I could (sometimes) see that a print job failed to print because the "filter failed." But since last week, it was named that was failing (for me), it's obvious that this mode of failure could affect any (dynamically-linked?) executable (or libraries that it uses), yeah? * Is there a way to prevent the problem from occurring? * Now that the problem has definitely occurred, is there a way to detect that a (poudriere-built) package suffers from that problem? That said, >8 years of weekly updates without a "hiccup" worth mentioning is a pretty good record. :-) Peace, david -- David H. Wolfskill da...@catwhisker.org Alexey Navalny was a courageous man; Putin has made him a martyr. See https://www.catwhisker.org/~david/publickey.gpg for my public key.
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