# ./autogen.sh
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.ac:120: error: possibly undefined macro: AC_DEFINE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:342: error: possibly undefined macro: AC_MSG_ERROR
configure.ac:596: error: possibly undefined macro: AS_IF
autoreconf: /usr/bin/autoconf failed with exit status: 1