From: Nikolai Weibull Date: 2011-05-12T20:27:56+09:00 Subject: Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? On Thu, May 12, 2011 at 12:35, Quintus wrote: > Obviously RedCloth generates some warnings during compilation, and now > RubyGems advises the compiler to treat them as errors RedCloth adds -Werror, see https://github.com/jgarber/redcloth/blob/master/tasks/compile.rake#L33 > somedays ago RedCloth installed without problems It seems your environment has changed in some other way. Perhaps GCC has been upgraded?