Unnamed

root@debian:~# gem install postgres
Bulk updating Gem source index for: http://gems.rubyforge.org
Building native extensions.  This could take a while...
ERROR:  While executing gem ... (Gem::Installer::ExtensionBuildError)
    ERROR: Failed to build gem native extension.

ruby extconf.rb install postgres
checking for cygwin32_socket() in -lwsock32... no
checking for socket() in -lsocket... no
checking for gethostbyname() in -linet... no
checking for gethostbyname() in -lnsl... yes
checking for sys/un.h... yes
checking for socket()... yes
checking for hsterror()... no
checking for gethostname()... yes
checking for PQsetdbLogin() in -lpq... no
*** 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-dird
        --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/ruby1.8
        --with-pgsql-dir
        --without-pgsql-dir
        --with-pgsql-include
        --without-pgsql-include=${pgsql-dir}/include
        --with-pgsql-lib
        --without-pgsql-lib=${pgsql-dir}/lib
        --with-wsock32lib
        --without-wsock32lib
        --with-socketlib
        --without-socketlib
        --with-inetlib
        --without-inetlib
        --with-nsllib
        --without-nsllib
        --with-pgsql-include-dir
        --without-pgsql-include-dir
        --with-pgsql-lib-dir
        --without-pgsql-lib-dir
        --with-pqlib
        --without-pqlib
Could not find PostgreSQL libraries: Makefile not created


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/postgres-0.7.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/postgres-0.7.1/gem_make.out
root@debian:~#