Is there any way to change gcc compilation options for a gem?

Question

I\'m struggling to install the RedCloth gem. When I type

gem install RedCloth

I get :

[…]
ragel/redcloth_attributes.c.rl:          


        

Answer 1

Had the same problem and here is the solution:

$ sudo gem install RedCloth -- --with-cflags=\"-O2 -pipe -march=native -Wno-unused-but-set-variable\"

You have to escape the quotes if you have more than one argument.

Answer 2

If you're using bundler, the following works:

bundle config build.RedCloth --with-cflags=\"-O2 -pipe -march=native -Wno-unused-but-set-variable\"