linuxdoc-tools in portage are a bit out of date. Simple $ cp linuxdoc-tools-0.9.21_p4.ebuild linuxdoc-tools-0.9.21_p10.ebuild and applying of the following patch should fix the problem: --- /usr/portage/app-text/linuxdoc-tools/linuxdoc-tools-0.9.21_p4.ebuild 2007-07-12 09:05:32.000000000 +0400 +++ linuxdoc-tools-0.9.21_p10.ebuild 2007-09-01 17:12:46.000000000 +0400 @@ -33,8 +33,7 @@ src_unpack() { unpack ${A} - cd ${S} - epatch "${FILESDIR}/${PN}-fi.patch" + cd "${S}" epatch "${FILESDIR}/${PN}-0.9.13-letter.patch" epatch "${FILESDIR}/${PN}-0.9.20-lib64.patch" epatch "${FILESDIR}/${PN}-0.9.20-strip.patch" ${PN}-fi.patch is not necessary as it's already integrated in the package. ${S} should be quoted. Thank you in advance.
I went ahead and bumped linuxdoc-tools-0.9.21_p11.