metalogo ~ # FEATURES=-collision-protect emerge --nodeps shadow && emerge --unmerge pam-login
Calculating dependencies... done!
>>> Emerging (1 of 1) sys-apps/shadow-4.0.15-r2 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking shadow-4.0.15.tar.bz2 ;-)
>>> Unpacking source...
>>> Unpacking shadow-4.0.15.tar.bz2 to /var/tmp/portage/shadow-4.0.15-r2/work
 * Applying shadow-4.0.13-nonis.patch ...                                                                             [ ok ]
 * Applying shadow-4.0.13-login.defs.patch ...                                                                        [ ok ]
 * Applying shadow-4.0.13-dots-in-usernames.patch ...                                                                 [ ok ]
 * Applying shadow-4.0.13-long-groupnames.patch ...                                                                   [ ok ]
 * Applying shadow-4.0.12-gcc2.patch ...                                                                              [ ok ]
 * Applying shadow-4.0.14-su-fix-environment.patch ...                                                                [ ok ]
 * Applying shadow-4.0.11.1-perms.patch ...                                                                           [ ok ]
 * Applying shadow-4.0.15-uclibc-missing-l64a.patch ...                                                               [ ok ]
 * Applying shadow-4.0.15-no-default-MAIL.patch ...                                                                   [ ok ]
 * Applying shadow-4.0.15-sanity-checks.patch ...                                                                     [ ok ]
 * Running autoconf ...                                                                                               [ ok ]
 * Running elibtoolize in: shadow-4.0.15
 *   Applying portage-1.5.10.patch ...
 *   Applying max_cmd_len-1.5.20.patch ...
 *   Applying sed-1.5.6.patch ...
 * Removing useless C++ checks ...                                                                                    [ ok ]
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/shadow-4.0.15-r2/work/shadow-4.0.15 ...
 * econf: updating shadow-4.0.15/config.guess with /usr/share/gnuconfig/config.guess
 * econf: updating shadow-4.0.15/config.sub with /usr/share/gnuconfig/config.sub
./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 --disable-desrpc --with-libcrypt --with-libcrack --enable-shared=no --enable-static=yes --with-libpam --without-skey --without-selinux --enable-nls --build=x86_64-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 whether to enable maintainer-specific portions of Makefiles... no
checking for x86_64-pc-linux-gnu-gcc... no
checking for gcc... 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/shadow-4.0.15-r2/work/shadow-4.0.15/config.log

!!! ERROR: sys-apps/shadow-4.0.15-r2 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  shadow-4.0.15-r2.ebuild, line 72:   Called econf '--disable-desrpc' '--with-libcrypt' '--with-libcrack' '--enable-shared=no' '--enable-static=yes' '--with-libpam' '--without-skey' '--without-selinux' '--enable-nls'
  ebuild.sh, line 541:   Called die

!!! econf failed
!!! If you need support, post the topmost build error, and the call stack if relevant.

metalogo ~ #