cat /var/tmp/portage/dev-libs/expat-2.0.1/temp/build.log
>>> Unpacking source...
>>> Unpacking expat-2.0.1.tar.gz to /var/tmp/portage/dev-libs/expat-2.0.1/work
 * Running elibtoolize in: expat-2.0.1/conftools
 *   Applying install-sh-1.5.patch ...
 *   Applying portage-1.5.10.patch ...
 *   Applying max_cmd_len-1.5.20.patch ...
 *   Applying sed-1.5.6.patch ...
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/dev-libs/expat-2.0.1/work/expat-2.0.1 ...
 * econf: updating expat-2.0.1/conftools/config.sub with /usr/share/gnuconfig/config.sub
 * econf: updating expat-2.0.1/conftools/config.guess with /usr/share/gnuconfig/config.guess
./configure --prefix=/usr --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --libdir=/usr/lib64 --build=x86_64-pc-linux-gnu
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for x86_64-pc-linux-gnu-gcc... x86_64-pc-linux-gnu-gcc
checking for C compiler default output file name... configure: error: C compiler cannot create executables
See `config.log' for more details.

!!! Please attach the following file when filing a report to bugs.gentoo.org:
!!! /var/tmp/portage/dev-libs/expat-2.0.1/work/expat-2.0.1/config.log
 * 
 * ERROR: dev-libs/expat-2.0.1 failed.
 * Call stack:
 *   ebuild.sh, line 1701:  Called dyn_compile
 *   ebuild.sh, line 1039:  Called qa_call 'src_compile'
 *   ebuild.sh, line   44:  Called src_compile
 *   ebuild.sh, line  706:  Called econf
 *   ebuild.sh, line  638:  Called die
 * The specific snippet of code:
 *                      die "econf failed"
 *  The die message:
 *   econf failed
 * 
 * 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/dev-libs/expat-2.0.1/temp/build.log'.
 *