Compatibility with newer autotools
YAXT is currently tested and released with autoconf 2.69, automake 1.14.1 and libtool 2.4.6. I've gone through changes in recent autoconf and automake and we seem fine in that regard by now or a workaround for changed behaviour is at least known. In case anyone encounters an issue running scripts/reconfigure with newer tools, please report here. What's still missing is porting the libtool patches to 2.4.7, so that's mostly what this issue is meant to track.