Hey I recently implemented a pretty sizeable set of M4sh extensions that make it much more suitable for writing general purpose shell scripts.
That is wonderful, could please you share a link? Whoever is most actively working on M4sh would be an incredibly useful contact for me, so if "that's you" let me know. I maintain my own collection of M4sh macros at https://github.com/madmurphy/not-autotools (see its README <https://github.com/madmurphy/not-autotools/blob/master/README.md> and Macro Index <https://github.com/madmurphy/not-autotools/blob/master/macro-index.md>). Please do contact me if you find anything interesting there. --madmurphy
