autoconf

gentoo-rpi3 rican-linux # cat /var/tmp/portage/sys-devel/libtool-2.4.6-r3/temp/autoconf.out
***** autoconf *****
***** PWD: /var/tmp/portage/sys-devel/libtool-2.4.6-r3/work/libtool-2.4.6/libltdl
***** autoconf --force

configure:2433: error: possibly undefined macro: AC_MSW_RESULT
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
gentoo-rpi3 rican-linux #