I'm trying to create a gem which includes a C extension. I'm using the standard Gem::PackageTask to make the gem.
When I install the gem it builds the .so file properly and installs it in three locations:
/home/me/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/extensions/x86_64-linux/2.2.0-static/nmatrix-atlas-0.1.0/nmatrix_atlas.so /home/me/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/nmatrix-atlas-0.1.0/lib/nmatrix_atlas.so /home/me/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/nmatrix-atlas-0.1.0/ext/nmatrix_atlas/nmatrix_atlas.so
I'm curious as to why it makes three copies of this. But anyway, the first one is the one that actually gets loaded when i do require 'whatever'. The problem is that when I make a change to the code, then repackage the gem, then run gem install again, the new code gets compiled into a new .so and the latter two .so's get replaced with the new, but the first one doesn't get updated. So ruby still sees the old code. I have to do gem uninstall followed by gem install to get it to update.
Is this a bug in rubygems? Or is it the expected behavior? Or am I doing something else wrong?
EDIT: For anyone who is curious, I filed a bug on rubygems. No response yet.