Issue #5157 has been reported by Eric Wong.

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Feature #5157: [PATCH] add -Wunused-variable to CFLAGS
http://redmine.ruby-lang.org/issues/5157

Author: Eric Wong
Status: Open
Priority: Low
Assignee: 
Category: build
Target version: 1.9.x


Unused variables are ugly.

As an often-careless C extension maintainer, I end up with a lot of unused
variables, so this compiler flag will propagate to extensions I maintain.

The core of Ruby is remarkably free of unused variables despite the
current lack of -Wunused-variable, however I've also attached a trivial
patch to the openssl extension that removes a few unused variables.


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