>>> Unpacking source...
>>> Unpacking sandbox-1.2.18.1.tar.bz2 to /var/tmp/portage/sys-apps/sandbox-1.2.18.1-r2/work
 * Applying sandbox-1.2.18.1-open-normal-fail.patch ...
  [ ok ]
 * Applying sandbox-1.2.18.1-open-cloexec.patch ...
  [ ok ]
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/sys-apps/sandbox-1.2.18.1-r2/work/sandbox-1.2.18.1 ...
 * If configure fails with a 'cannot run C compiled programs' error, try this:
 * FEATURES=-sandbox emerge sandbox
 * Configuring sandbox for ABI=x86...
 * econf: updating sandbox-1.2.18.1/config.guess with /usr/share/gnuconfig/config.guess
 * econf: updating sandbox-1.2.18.1/config.sub with /usr/share/gnuconfig/config.sub
../sandbox-1.2.18.1//configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --libdir=/usr/lib32 --enable-multilib --build=i686-pc-linux-gnu
checking for a BSD-compatible install... /bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for i686-pc-linux-gnu-gcc... no
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.

!!! Please attach the following file when filing a report to bugs.gentoo.org:
!!! /var/tmp/portage/sys-apps/sandbox-1.2.18.1-r2/work/build-x86-x86_64-pc-linux-gnu/config.log

!!! ERROR: sys-apps/sandbox-1.2.18.1-r2 failed.
Call stack:
  ebuild.sh, line 1614:   Called dyn_compile
  ebuild.sh, line 971:   Called qa_call 'src_compile'
  environment, line 3378:   Called src_compile
  sandbox-1.2.18.1-r2.ebuild, line 87:   Called econf '--libdir=/usr/lib32' '--enable-multilib'
  ebuild.sh, line 577:   Called die

!!! 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/sys-apps/sandbox-1.2.18.1-r2/temp/build.log'.