As noted on sage-support, the sage-5.0 binary
sage-5.0-linux-32bit-fedora_release_16_verne_-i686-Linux.tar.gz requires
the boost library libboost_unit_test_framework at runtime, since the
binary was built on a machine with that library available. PolyBoRi
checks for -lboost_unit_test_framework and links against it if available.
The new package at #12963 fixes PolyBoRi not to use the Boost testing
framework if SAGE_FAT_BINARY=yes.
Even if we plan to add more of Boost to Sage, this is still a useful
solution in the short term, so we can ship working binaries soon.
Please review:
http://trac.sagemath.org/sage_trac/ticket/12963