I’m in trouble trying installing OP on Red Hat 4.4.7-4 when I try bundle install I get this error:

Using arel (3.0.3)
Using tzinfo (0.3.38)
Using activerecord (3.2.18)
Using activerecord-tableless (1.3.3)
Using activeresource (3.2.18)
Using acts_as_list (0.2.0)
Using addressable (2.3.4)
Using awesome_nested_set (2.1.6)
Using debug_inspector (0.0.2)

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb
creating Makefile

make
gcc -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/1.8/x86_64-linux -I. -fPIC -g -O2 -fPIC -O0 -std=c99 -c binding_of_caller.c
make: execvp: gcc: Permission denied
make: ***** [binding_of_caller.o] Error 127

Gem files will remain installed in /home/massi105/.gem/ruby/1.8/gems/binding_of_caller-0.7.2 for inspection.
Results logged to /home/massi105/.gem/ruby/1.8/gems/binding_of_caller-0.7.2/ext/binding_of_caller/gem_make.out
An error occurred while installing binding_of_caller (0.7.2), and Bundler cannot continue.
Make sure that `gem install binding_of_caller -v ‘0.7.2’` succeeds before bundling.