Hello, I think that since version 1.4.9 there has been so called Present-But-Cannot-Be-Compiled bug in m4 source code:
http://www.gnu.org/software/autoconf/manual/html_node/Present-But-Cannot-Be-Compiled.html In my development environment I have autoconf 2.64 and error messages are complaining that autoconf 2.61 is needed. Best regards, Jorma Karvonen
