full Buildlog http://launchpadlibrarian.net/64380231/buildlog_ubuntu-natty-i386.firebird2.5_2.5.0.26074-0.ds4-3ubuntu1_FAILEDTOBUILD.txt.gz What is different vs debian is adding of -Bsymbolic-functions in LDFLAGS I will try to solve it first approach is using LDFLAGS="-Wl,--as-needed"