These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] sys-apps/entropy-9999 [0.12.24.13] 0 kB [1]
[ebuild     U ] app-admin/equo-9999-r8 [0.12.24.13] 0 kB [1]

Total: 2 packages (2 upgrades), Size of downloads: 0 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /usr/portage/local/layman/sabayon

Would you like to merge these packages? [Yes/No] y
>>> Verifying ebuild Manifests...
>>> starting parallel fetching pid 27279

>>> Emerging (1 of 2) sys-apps/entropy-9999 to /
 * pysqlite-2.3.5.tar.gz RMD160 SHA1 SHA256 size ;-) ...                     [ ok ]
 * checking ebuild checksums ;-) ...                                         [ ok ]
 * checking auxfile checksums ;-) ...                                        [ ok ]
 * checking miscfile checksums ;-) ...                                       [ ok ]
 * checking pysqlite-2.3.5.tar.gz ;-) ...                                    [ ok ]
>>> Unpacking source...
 * subversion update start -->
 *      repository: http://svn.sabayonlinux.org/projects/entropy/trunk
At revision 1495.
 *    working copy: /usr/portage/distfiles/svn-src/entropy/trunk

>>> Unpacking pysqlite-2.3.5.tar.gz to /var/tmp/portage/sys-apps/entropy-9999/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/sys-apps/entropy-9999/work/trunk ...
 * nothing to compile
>>> Source compiled.
>>> Test phase [not enabled]: sys-apps/entropy-9999

>>> Install entropy-9999 into /var/tmp/portage/sys-apps/entropy-9999/image/ category sys-apps
running install
running build
running build_py
creating build
creating build/lib.linux-i686-2.5
creating build/lib.linux-i686-2.5/pysqlite2
copying pysqlite2/dbapi2.py -> build/lib.linux-i686-2.5/pysqlite2
copying pysqlite2/__init__.py -> build/lib.linux-i686-2.5/pysqlite2
running build_ext
building 'pysqlite2._sqlite' extension
creating build/temp.linux-i686-2.5
creating build/temp.linux-i686-2.5/src
i586-pc-linux-gnu-gcc -pthread -fno-strict-aliasing -Os -march=pentium-m -mtune=pentium-m -fomit-frame-pointer -pipe -fPIC -DMODULE_NAME="pysqlite2.dbapi2" -I/usr/include -I/usr/include/python2.5 -c src/module.c -o build/temp.linux-i686-2.5/src/module.o
unable to execute i586-pc-linux-gnu-gcc: No such file or directory
error: command 'i586-pc-linux-gnu-gcc' failed with exit status 1
 * 
 * ERROR: sys-apps/entropy-9999 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_install
 *             environment, line 2366:  Called distutils_src_install
 *             environment, line  710:  Called die
 * The specific snippet of code:
 *           ${python} setup.py install --root=${D} --no-compile "$@" || die;
 *  The die message:
 *   (no error message)
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/sys-apps/entropy-9999/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/entropy-9999/temp/environment'.
 * 

 * Messages for package sys-apps/entropy-9999:

 * 
 * ERROR: sys-apps/entropy-9999 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_install
 *             environment, line 2366:  Called distutils_src_install
 *             environment, line  710:  Called die
 * The specific snippet of code:
 *           ${python} setup.py install --root=${D} --no-compile "$@" || die;
 *  The die message:
 *   (no error message)
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/sys-apps/entropy-9999/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/entropy-9999/temp/environment'.
 *