>>> Unpacking source...
>>> Unpacking vamp-libxtract-plugins-0.4.2.20071019.tar.gz to /var/tmp/portage/media-plugins/vamp-libxtract-plugins-0.4.2.20071019/work
>>> Source unpacked in /var/tmp/portage/media-plugins/vamp-libxtract-plugins-0.4.2.20071019/work
>>> Compiling source in /var/tmp/portage/media-plugins/vamp-libxtract-plugins-0.4.2.20071019/work/vamp-libxtract-plugins-0.4.2.20071019 ...
make -j14 
i686-pc-linux-gnu-g++ -O2 -pipe -DNDEBUG -fPIC -DPIC -ffast-math -Wall -I../vamp-plugin-sdk -I.   -c -o libmain.o libmain.cpp
i686-pc-linux-gnu-g++ -O2 -pipe -DNDEBUG -fPIC -DPIC -ffast-math -Wall -I../vamp-plugin-sdk -I.   -c -o plugins/XTractPlugin.o plugins/XTractPlugin.cpp
plugins/XTractPlugin.cpp: In member function 'virtual std::string XTractPlugin::getCopyright() const':
plugins/XTractPlugin.cpp:118: error: 'sprintf' was not declared in this scope
make: *** [plugins/XTractPlugin.o] Error 1
make: *** Waiting for unfinished jobs....
 * 
 * ERROR: media-plugins/vamp-libxtract-plugins-0.4.2.20071019 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line  973:  Called die
 * The specific snippet of code:
 *       emake || die "make failed"
 *  The die message:
 *   make 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/media-plugins/vamp-libxtract-plugins-0.4.2.20071019:20090707-165549.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-plugins/vamp-libxtract-plugins-0.4.2.20071019/temp/environment'.
 *