From: Eric Wong <normalperson@...>
Date: 2012-01-26T05:38:03+09:00
Subject: Re: Install mysql2 gem in Ubuntu 11.10 with RVM

Jim Wharton <jamesawharton@gmail.com> wrote:
> /usr/bin/ld: i386 architecture of input file 
> `libruby-static.a(dmyext.o)' is incompatible with i386:x86-64 output
> collect2: ld returned 1 exit status
> make: *** [miniruby] Error 1

> I've been using this .rvm folder since I was on an i386 version of 
> Ubuntu 10.10.
> 
> I've since upgraded to 11.10 but left my home directory untouched. Is 
> that a possible issue? Should I whack RVM and reinstall?

Yes, nuke and reinstall RVM.

Generally, you need to rebuild/relink everything not managed by the OS
package manager if you're switching between 32/64-bit, switching between
OSes, or downgrading the OS...