activerecord-postgresql-adapter-error

[root@puppet-server bin]# ./gem install activerecord-postgresql-adapter -- --verbose --with-pg-config=/opt/puppet/bin/pg_config --with-pg-lib=/opt/puppet/include/libpq-fe.h
Building native extensions.  This could take a while...
ERROR:  Error installing activerecord-postgresql-adapter:
	ERROR: Failed to build gem native extension.

        /opt/puppet/bin/ruby extconf.rb --verbose --with-pg-config=/opt/puppet/bin/pg_config --with-pg-lib=/opt/puppet/include/libpq-fe.h
Using config values from /opt/puppet/bin/pg_config
checking for libpq-fe.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=/opt/puppet/bin/ruby
	--with-pg
	--without-pg
	--with-pg-config
	--with-pg-dir
	--without-pg-dir
	--with-pg-include
	--without-pg-include=${pg-dir}/include
	--with-pg-lib=${pg-dir}/lib
/opt/puppet/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 /opt/puppet/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:970:in `block in find_header'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:254:in `open'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:254:in `open'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
	from /opt/puppet/lib/ruby/1.9.1/mkmf.rb:969:in `find_header'
	from extconf.rb:48:in `<main>'


Gem files will remain installed in /opt/puppet/lib/ruby/gems/1.9.1/gems/pg-0.17.0 for inspection.
Results logged to /opt/puppet/lib/ruby/gems/1.9.1/gems/pg-0.17.0/ext/gem_make.out