Hi Tim,
> Well, all made on the _same_ system (my desktop) with just ~35 minutes
> in between.
>
> Since system updates are made manually, it is _very_ unlikely that I
> made an update between the tests.
:-)
> But yes, I made one test without $CC set (so likely with gcc) and the
> other one with CC=clang and CFLAGS=-fsanitize...
Then it would be useful to have the config.{cache,log,status} results also
for a build where CC=clang but CFLAGS unset. So as to distinguish which
differences come from clang vs. gcc and which come from the sanitizers.
Each of these differences points to a possible problem in our *.m4 macros.
Bruno