On Apr 26, 2014, at 13:03, Christopher Jones wrote:

> You should try looking around in the includes directory a bit ….
> 
> ruby/config.h exists in
> 
> /opt/local/include/ruby-2.1.0/x86_64-darwin13
> 
> so it looks like you need to add
> 
> -I/opt/local/include/ruby-2.1.0/x86_64-darwin13
> 
> to your compilation command. No idea if this is normal ruby behaviour, as I 
> said I am not a user or ruby.

You’ll want to let pkg-config find those values for you. On my system, I get:


$ pkg-config ruby-2.1 --cflags
-I/opt/local/include/ruby-2.1.0/universal-darwin13 
-I/opt/local/include/ruby-2.1.0 
$ pkg-config ruby-2.1 --libs
-L/opt/local/lib -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress 
-lruby.2.1.0 -lpthread -ldl -lobjc 
$ 

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