[FIXED] Problem installing pg gem: checking for PQconnectdb() in -lpq... no

gistfile1.txt

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

        /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/local/bin/pg_config
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for pg_config_manual.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
	--with-pg
	--without-pg
	--with-pg-dir
	--without-pg-dir
	--with-pg-include
	--without-pg-include=${pg-dir}/include
	--with-pg-lib
	--without-pg-lib=${pg-dir}/lib
	--with-pg-config
	--without-pg-config
	--with-pg_config
	--without-pg_config
	--with-pqlib
	--without-pqlib
	--with-libpqlib
	--without-libpqlib
	--with-ms/libpqlib
	--without-ms/libpqlib


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/pg-0.14.1 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/pg-0.14.1/ext/gem_make.out

dominicsayers$ file /usr/local/lib/libpq.dylib
/usr/local/lib/libpq.dylib: Mach-O 64-bit dynamically linked shared library x86_64

dominicsayers$ sudo env ARCHFLAGS="-arch x86_64" gem install pg
Building native extensions.  This could take a while...
Successfully installed pg-0.14.1
1 gem installed
Installing ri documentation for pg-0.14.1...
Installing RDoc documentation for pg-0.14.1...

You solved a three hours problem. Thank you so much