execinfo: new module This is for Emacs. Currently, it provides a no-effect stub on all platforms where it does not already work. It already works on glibc-based systems, and on Solaris 11. * lib/execinfo.c, lib/execinfo.in.h, m4/execinfo.m4, modules/execinfo: New files. * doc/glibc-headers/execinfo.texi (execinfo.h): * MODULES.html.sh (Misc): Document it.