>>> Unpacking source...
>>> Unpacking lighttpd-1.4.23.tar.bz2 to /var/tmp/portage/www-servers/lighttpd-1.4.23/work
>>> Source unpacked in /var/tmp/portage/www-servers/lighttpd-1.4.23/work
>>> Preparing source in /var/tmp/portage/www-servers/lighttpd-1.4.23/work/lighttpd-1.4.23 ...
 * Running eautoreconf in '/var/tmp/portage/www-servers/lighttpd-1.4.23/work/lighttpd-1.4.23' ...
 * Running aclocal ...                                                        [ ok ]
 * Running libtoolize --copy --force --install --automake ...                 [ ok ]
 * Running aclocal ...                                                        [ ok ]
 * Running autoconf ...                                                       [ !! ]

 * Failed Running autoconf !
 *
 * Include in your bugreport the contents of:
 *
 *   /var/tmp/portage/www-servers/lighttpd-1.4.23/temp/autoconf.out

 *
 * ERROR: www-servers/lighttpd-1.4.23 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_prepare
 *             environment, line 3400:  Called eautoreconf
 *             environment, line  894:  Called eautoconf
 *             environment, line  836:  Called autotools_run_tool 'autoconf'
 *             environment, line  342:  Called die
 * The specific snippet of code:
 *           die "Failed Running $1 !";
 *  The die message:
 *   Failed Running autoconf !
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/www-servers/lighttpd-1.4.23/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/www-servers/lighttpd-1.4.23/temp/environment'.
 *