MSYS m4 has been updated to version 1.4.16-2. See http://sourceforge.net/projects/mingw/files/MSYS/Extension/m4/m4-1.4.16-2/ for the file list and release notes.
Upgrade with mingw-get:
mingw-get upgrade msys-m4
Sign up for the SourceForge newsletter:
You seem to have CSS turned off.
Please don't fill out this field.