Disable confcache in /etc/make.conf if you are getting this when trying to emerge device-mapper.1.02.19 on Gentoo: checking target system type… config.sub: missing argument Try `config.sub –help’ for more information. configure: error: /bin/sh autoconf/config.sub failed !!! Please attach the following file when filing a report to bugs.gentoo.org: !!! /var/tmp/portage/sys-fs/device-mapper-1.02.19/work/device-mapper.1.02.19/config.log !!! ERROR: sys-fs/device-mapper-1.02.19 failed. Call stack: ebuild.sh,…