Whenever I call xdg-open some.odt file I see error message: $ xdg-open somedocument.docx START /usr/bin/libreoffice --writer somedocument.docx LibreOffice 4.4.3.2 40m0(Build:2) Unknown option: --writer somedocument.docx This happens if DE=generic and no dev-perl/File-MimeInfo is installed. I'm not sure about other situation. Nevertheless following upstream commit already fixed this issue: 13d9b0cac97e438bf7dc06452ee7fb3480907d88 Please, backport, or personally I just did tarball with git sources as of 20150716 and this started to work for me.
Feel free to bump the ebuild using that newer snapshot Thanks :)
Thanks fpr reporting. This is fixed in git now. Please sync. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d63b775aa4496f79fab24312102578fd08c3597b