Autoconf 2.57 appears to work fine, as well.
-rw-r--r-- 0 AUTHORS
-rw-r--r-- 4473 ChangeLog
-rw-r--r-- 92 Makefile.am
-rw-r--r-- 0 NEWS
-rw-r--r-- 0 README
-rwxr-xr-x 62 autogen.sh
-rw-r--r-- 728 configure.ac
-rw-r--r-- 29421 xcompmgr.c