Good Day, I am trying to get passenger running on one of our servers at work but when I run gem install passenger it seems not to be compiling here is the Output i am getting ---------------------------------------------------------------------------------- root@web1 jeff]# gem install passenger Building native extensions. This could take a while... ERROR: Error installing passenger: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb creating Makefile make gcc -I. -I/usr/lib/ruby/1.8/i686-linux -I/usr/lib/ruby/1.8/i686-linux -I. -fPIC -O2 -g -march=i686 -Wall -fPIC -c fastthread.c fastthread.c:1: error: CPU you selected does not support x86-64 instruction set make: *** [fastthread.o] Error 1 Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/fastthread-1.0.7 for inspection. Results logged to /usr/lib/ruby/gems/1.8/gems/fastthread-1.0.7/ext/fastthread/gem_make.out [root@web1 jeff]# ------------------------------------------------------------------------------ This box is run centos 5.4(Final) kernel:"Linux xxxx.xxxx 2.6.18-164.11.1.el5xen #1 SMP Wed Jan 20 08:06:04 EST 2010 x86_64 x86_64 x86_64 GNU/Linux| -- Posted via http://www.ruby-forum.com/.