>>> Unpacking source...
>>> Unpacking boost_1_34_1.tar.bz2 to /home/leo/portage/portage/dev-libs/boost-1.34.1/work
>>> Source unpacked.
>>> Compiling source in /home/leo/portage/portage/dev-libs/boost-1.34.1/work/boost_1_34_1 ...
 * Writing new user-config.jam
 * Using the following options to build:
 *   release debug-symbols=none optimization=none --user-config=/home/leo/portage/portage/dev-libs/boost-1.34.1/work/boost_1_34_1/user-config.jam
 * Building shared libraries
/usr/portage/dev-libs/boost/boost-1.34.1.ebuild: line 123: 18938 Segmentation fault      bjam ${NUMJOBS} ${OPTIONS} threading=single,multi runtime-link=${linkoption} link=${linkoption} --prefix="${D}/usr" --layout=system
 *
 * ERROR: dev-libs/boost-1.34.1 failed.
 * Call stack:
 *   ebuild.sh, line 1654:   Called dyn_compile
 *   ebuild.sh, line 990:   Called qa_call 'src_compile'
 *   ebuild.sh, line 44:   Called src_compile
 *   boost-1.34.1.ebuild, line 131:   Called die
 *
 * building boost failed
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/log/portage/dev-libs:boost-1.34.1:20070830-015704.log'.
 *