I am running Mac OS X version 10.6.3. I am running R 2.11.1 GUI 1.34 64 bit. I have RPostgreSQL 0.1-6 (as RPostgreSQL_0.1-6.tar) from this site: http://mac.softpedia.com/get/Developer-Tools/RPostgresql.shtml I have PostgreSQL version 8.4.4-1 for Mac OS X from this site: http://www.enterprisedb.com/products/pgdownload.do The files libpq.a and libpq.dylib are under: /Library/PostgreSQL/8.4/lib/ The file libpq-fe.h is under: /Library/PostgreSQL/8.4/include/libpq/ In the terminal: cd Downloads sudo R --arch=i386 CMD INSTALL RPostgreSQL_0.1-6.tar --configure-args='--withpgsql-libraries=/Library/PostgreSQL/8.4/lib --with-pgsql-includes=/Library/PostgreSQL/8.4/include/libpq' results in: * installing to library '/Library/Frameworks/R.framework/Resources/Library' * installing *source* package 'RPostgreSQL' ... configure: error: unrecognized option: --withpgsql-libraries=/Library/PostgreSQL/8.4/lib Try `./configure --help' for more information. ERROR: configuration failed for package 'RPostgreSQL' * removing '/Library/Frameworks/R.framework/Resources/library/RPostgreSQL' What can I do to install RPostgreSQL? [[alternative HTML version deleted]]