A patch for making it work.
Created attachment 90881 [details, diff] gnu-jaxp-1.3-jdk15.patch
I just added a revision bump that is using the generation 2 build setup and made the ebuild force 1.4 so now it at least builds with 1.5 as the system vm. Patching will of course be the better solution in the long run. Will try to get back to that later.
Or we could bump it because according to homepage it now supports jaxp 1.3. But there's no new standalone version, it's been integrated to gnu-classpath. I would best see this package go. I already removed it as dep from packages where it wasn't actually needed, so once they are stabilized, these are left: dev-java/xmojo-bin/xmojo-bin-5.0.0-r1.ebuild: >=dev-java/gnu-jaxp-1.0" dev-java/xmojo-bin/xmojo-bin-5.0.0.ebuild: >=dev-java/gnu-jaxp-1.0" ./java-experimental/dev-java/jboss-module-remoting/jboss-module-remoting-4.0.2.ebuild: dev-java/gnu-jaxp ./java-experimental/dev-java/jboss-module-common/jboss-module-common-4.0.2.ebuild: dev-java/gnu-jaxp ./java-experimental/dev-java/jboss-module-webservice/jboss-module-webservice-4.0.2.ebuild: dev-java/gnu-jaxp ./java-experimental/dev-java/jboss-module-jaxrpc/jboss-module-jaxrpc-4.0.2.ebuild: dev-java/gnu-jaxp ./java-experimental/dev-java/jboss-module-jmx/jboss-module-jmx-4.0.2.ebuild: dev-java/gnu-jaxp ./java-experimental/dev-java/jboss-module-cache/jboss-module-cache-4.0.2.ebuild: dev-java/gnu-jaxp ./java-overlay/dev-java/dvsl/dvsl-20050702-r1.ebuild: dev-java/gnu-jaxp ./java-overlay/dev-java/cewolf/cewolf-1.0.ebuild: >=dev-java/gnu-jaxp-1.0.0 It's possible that it's not needed even in those.
Package gone on 2008-11-09