On attempting to install rails on a windows7 system it fails with:
H:>gem install rails
Building native extensions. This could take a while…
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
"H:/My Programs/Ruby200-x64/bin/ruby.exe" extconf.rb
H:/My Programs/Ruby200-x64/bin/ruby.exe: invalid option -P (-h will
Gem files will remain installed in H:/My
0/gems/atomic-1.1.14 for inspection.
Results logged to H:/My
So why does the builder use an invalid option?
ruby 2.0.0p247 (2013-06-27) [x64-mingw32]
Its propably something simple