Autotools have a library of m4 macros called m4sugar that is quite powerful. I can't quite recall whether it's limited to GNU M4 and as to the readability, well

Autotools have a library of m4 macros called m4sugar that is quite powerful. I can't quite recall whether it's limited to GNU M4 and as to the readability, well, it's still m4... https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/Programming-in-M4sugar.html https://www.gnu.org/software/autoconf/manual/autoconf-2.67/h...