mpqc version 2.3.1-6 failed to build on amd64 with GCC-4.6/oneiric

mpqc version 2.3.1-6 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2462575

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2462575/+files/buildlog_ubuntu-natty-amd64.mpqc_2.3.1-6_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 6559 lines into the build log:

../../../lib/.libs/libSCscmat.so: undefined reference to `dcopy_'
../../../lib/.libs/libSCscmat.so: undefined reference to `ddot_'
../../../lib/.libs/libSCscmat.so: undefined reference to `_gfortran_stop_string'
../../../lib/.libs/libSCscmat.so: undefined reference to `_gfortran_st_write'
collect2: ld returned 1 exit status
make[4]: *** [molrender] Error 1
make[4]: Leaving directory `/build/buildd/mpqc-2.3.1/build-shared/src/bin/molrender'
make[3]: *** [default] Error 1
make[3]: Leaving directory `/build/buildd/mpqc-2.3.1/build-shared/src/bin'
make[2]: *** [default] Error 1
make[2]: Leaving directory `/build/buildd/mpqc-2.3.1/build-shared/src'
make[1]: *** [default] Error 1
make[1]: Leaving directory `/build/buildd/mpqc-2.3.1/build-shared'
make: *** [build-shared-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110424-1900
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/mpqc-2.3.1