$ sudo gem install tokyocabinet
Building native extensions.  This could take a while...
ERROR:  Error installing tokyocabinet:
        ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
setting variables ...
  $CFLAGS = -I. -I/usr/include -Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing -fPIC -O2
  $LDFLAGS = -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -L/build/buildd/ruby1.9.1-1.9.3.484/debian/lib -rdynamic -Wl,-export-dynamic -L. -L/usr/lib/x86_64
  $libs =  -ltokyocabinet -lbz2 -lz -lrt -lpthread -lm -lc
checking for tcutil.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/usr/bin/ruby1.9.1
        --with-tokyocabinet-dir
        --without-tokyocabinet-dir
        --with-tokyocabinet-include
        --without-tokyocabinet-include=${tokyocabinet-dir}/include
        --with-tokyocabinet-lib
        --without-tokyocabinet-lib=${tokyocabinet-dir}/lib
/usr/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
        from /usr/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'
        from /usr/lib/ruby/1.9.1/mkmf.rb:931:in `block in have_header'
        from /usr/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
        from /usr/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
        from /usr/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /usr/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
        from /usr/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /usr/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
        from /usr/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
        from /usr/lib/ruby/1.9.1/mkmf.rb:930:in `have_header'
        from extconf.rb:28:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/tokyocabinet-1.32.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/tokyocabinet-1.32.0/./gem_make.out
rumbles@ds1.domain.com[/opt/duc]$ cat /var/lib/gems/1.9.1/gems/tokyocabinet-1.32.0/mkmf.log
"gcc -o conftest -I/usr/include/ruby-1.9.1/x86_64-linux -I/usr/include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -D_FORTIFY_SOURCE=2  -D_FORTIFY_SOURCE=2 -I. -I/usr/include -Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing -fPIC -O2 conftest.c  -L. -L/usr/lib -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -L/build/buildd/ruby1.9.1-1.9.3.484/debian/lib -rdynamic -Wl,-export-dynamic -L. -L/usr/lib/x86_64     -ltokyocabinet -lbz2 -lz -lrt -lpthread -lm -lc -lruby-1.9.1  -lpthread -lrt -ldl -lcrypt -lm   -lc"
/usr/bin/ld: cannot find -ltokyocabinet
collect2: error: ld returned 1 exit status
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */