Package: gtksourceview Version: 1.8.5-1 seen when building with glibc-2.8; _GNU_SOURCE needs to be defined for the build. see https://launchpad.net/ubuntu/+source/gtksourceview/1.8.5-1/+build/778621/+files/buildlog_ubuntu-jaunty-armel.gtksourceview_1.8.5-1_FAILEDTOBUILD.txt.gz