On Wed, 16 Dec 2020 17:04:31 +0000, Ross Burton wrote: > All through the 2.70 prelease cycle I was periodically running builds > of OpenEmbedded with the snapshots as they were released. As we > autoreconf by default this was great at shaking out some bugs in both > packages and autoconf itself. However, I see that in between the > Release Candidate and the final release a large breaking change to C > version detection was integrated that basically means that any > software using gnulib needs to update? Perhaps you are hitting this bug that breaks C99 flag detection? https://savannah.gnu.org/support/?110396 - todd