In last git libreoffice option --disable-ext-postgresql-sdbc is changed to --disable-postgresql-sdbc. Please, fix it in ebuild. Thanks. Reproducible: Always
This seems to be now an issue for the new release, as libreoffice-3.5.0.3 doesn't honor USE -postgres but instead fails at configure stage failing to find pg_config
*** Bug 403673 has been marked as a duplicate of this bug. ***
This is just solved for libreoffice-3.5.0.3
Fixed in cvs.