dan@localhost ~ $ sudo emerge amarok
Calculating dependencies... done!
>>> starting parallel fetching

>>> Emerging (1 of 6) dev-ruby/fastthread-0.6.3 to /
 * fastthread-0.6.3.gem MD5 ;-) ...                                                                                                                                        [ ok ]
 * fastthread-0.6.3.gem RMD160 ;-) ...                                                                                                                                     [ ok ]
 * fastthread-0.6.3.gem SHA1 ;-) ...                                                                                                                                       [ ok ]
 * fastthread-0.6.3.gem SHA256 ;-) ...                                                                                                                                     [ ok ]
 * fastthread-0.6.3.gem size ;-) ...                                                                                                                                       [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                                                       [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                                                      [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                                                     [ ok ]
 * checking fastthread-0.6.3.gem ;-) ...                                                                                                                                   [ ok ]
>>> Unpacking source...
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/dev-ruby/fastthread-0.6.3/work ...
>>> Source compiled.
>>> Test phase [not enabled]: dev-ruby/fastthread-0.6.3

>>> Install fastthread-0.6.3 into /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/ category dev-ruby
make: /bin/install: Command not found
make: *** [/var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/lib/fastthread.so] Error 127
ERROR:  Error installing gem /var/tmp/portage/dev-ruby/fastthread-0.6.3/distdir/fastthread-0.6.3[.gem]: ERROR: Failed to build gem native extension.
Gem files will remain installed in /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3 for inspection.
  ruby extconf.rb install /var/tmp/portage/dev-ruby/fastthread-0.6.3/distdir/fastthread-0.6.3 -v 0.6.3 --no-ri --no-rdoc -l -i /var/tmp/portage/dev-ruby/fastthread-0.6.3/image///usr/lib/ruby/gems/1.8\ncreating Makefile
\nmake\ni686-pc-linux-gnu-gcc -I. -I/usr/lib/ruby/1.8/i686-linux -I/usr/lib/ruby/1.8/i686-linux -I.  -fPIC -march=i686 -O3 -pipe  -fPIC  -c fastthread.c
i686-pc-linux-gnu-gcc -shared  -L'/usr/lib' -Wl,-R'/usr/lib' -o fastthread.so fastthread.o  -Wl,-R -Wl,/usr/lib -L/usr/lib -L. -lruby18  -ldl -lcrypt -lm   -lc
\nmake install\nmkdir -p /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/lib
/bin/install -c -m 0755 fastthread.so /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/lib


Results logged to /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/ext/fastthread/gem_make.out
Building native extensions.  This could take a while...
ruby extconf.rb install /var/tmp/portage/dev-ruby/fastthread-0.6.3/distdir/fastthread-0.6.3 -v 0.6.3 --no-ri --no-rdoc -l -i /var/tmp/portage/dev-ruby/fastthread-0.6.3/image///usr/lib/ruby/gems/1.8
creating Makefile

make
i686-pc-linux-gnu-gcc -I. -I/usr/lib/ruby/1.8/i686-linux -I/usr/lib/ruby/1.8/i686-linux -I.  -fPIC -march=i686 -O3 -pipe  -fPIC  -c fastthread.c
i686-pc-linux-gnu-gcc -shared  -L'/usr/lib' -Wl,-R'/usr/lib' -o fastthread.so fastthread.o  -Wl,-R -Wl,/usr/lib -L/usr/lib -L. -lruby18  -ldl -lcrypt -lm   -lc

make install
mkdir -p /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/lib
/bin/install -c -m 0755 fastthread.so /var/tmp/portage/dev-ruby/fastthread-0.6.3/image/usr/lib/ruby/gems/1.8/gems/fastthread-0.6.3/lib

!!! ERROR: dev-ruby/fastthread-0.6.3 failed.
Call stack:
  ebuild.sh, line 1614:   Called dyn_install
  ebuild.sh, line 1060:   Called qa_call 'src_install'
  environment, line 3185:   Called src_install
  ebuild.sh, line 1304:   Called gems_src_install
  gems.eclass, line 78:   Called die

!!! gem install failed (spec file /var/tmp/portage/dev-ruby/fastthread-0.6.3/image///usr/lib/ruby/gems/1.8/specifications/fastthread-0.6.3.gemspec missing)
!!! 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-ruby/fastthread-0.6.3/temp/build.log'.

dan@localhost ~ $