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RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth?

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Hi there,

I just tried to install the RedCloth gem:

========================================
$ LANG=en_US.utf8 sudo gem install RedCloth
Fetching: RedCloth-4.2.7.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing RedCloth:
	ERROR: Failed to build gem native extension.

        /opt/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile

make
gcc -I. -I/opt/rubies/ruby-1.9.2-p180/include/ruby-1.9.1/x86_64-linux
- -I/opt/rubies/ruby-1.9.2-p180/include/ruby-1.9.1/ruby/backward
- -I/opt/rubies/ruby-1.9.2-p180/include/ruby-1.9.1 -I.   -fPIC -O3 -ggdb
- -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith
- -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long  -fPIC
- -O0 -Wall -Werror  -o redcloth_inline.o -c redcloth_inline.c
ragel/redcloth_inline.c.rl: In function ‘red_block’:
ragel/redcloth_inline.c.rl:99:9: error: variable ‘attr_regs’ set but not
used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

make: *** [redcloth_inline.o] Error 1


Gem files will remain installed in
/opt/rubies/ruby-1.9.2-p180/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.7 for
inspection.
Results logged to
/opt/rubies/ruby-1.9.2-p180/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.7/ext/redcloth_scan/gem_make.out
========================================

Obviously RedCloth generates some warnings during compilation, and now
RubyGems advises the compiler to treat them as errors--as far as I know
this wasn't the case with previous versions of RubyGems, because some
days ago RedCloth installed without problems (no, no new release of
RedCloth happened in the meantime). This causes the installation of
RedCloth to fail.
I'm not against treating warnings as errors, but there should be a way
to disable this setting, maybe via a commandline option
- --ignore-compilation-warnings or something like that, because I'm not a
RedCloth developer and therefore not interested in the warnings.

Further information on my system:

uname -a:
Linux hades 2.6.38-ARCH #1 SMP PREEMPT Tue May 3 07:40:34 CEST 2011
x86_64 AMD Athlon(tm) II X4 640 Processor AuthenticAMD GNU/Linux

ruby -v:
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux]

gem env:
RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.2
  - RUBY VERSION: 1.9.2 (2011-02-18 patchlevel 180) [x86_64-linux]
  - INSTALLATION DIRECTORY: /opt/rubies/ruby-1.9.2-p180/lib/ruby/gems/1.9.1
  - RUBY EXECUTABLE: /opt/rubies/ruby-1.9.2-p180/bin/ruby
  - EXECUTABLE DIRECTORY: /opt/rubies/ruby-1.9.2-p180/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /opt/rubies/ruby-1.9.2-p180/lib/ruby/gems/1.9.1
     - /home/quintus/.gem/ruby/1.9.1
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - "install" => "--format-executable"
     - "update" => "--format-executable"
     - "rdoc" => "--format=hanna"
  - REMOTE SOURCES:
     - http://rubygems.org/

Valete,
Marvin
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RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Quintus <sutniuq@gmx.net> - 2011-05-12 05:35 -0500
  Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Nikolai Weibull <now@bitwi.se> - 2011-05-12 06:27 -0500
    Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Quintus <sutniuq@gmx.net> - 2011-05-12 15:15 -0500
  Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Ryan Davis <ryand-ruby@zenspider.com> - 2011-05-12 16:00 -0500
    Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Nikolai Weibull <now@bitwi.se> - 2011-05-12 16:21 -0500
      Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Ryan Davis <ryand-ruby@zenspider.com> - 2011-05-12 18:59 -0500
        Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Nikolai Weibull <now@bitwi.se> - 2011-05-13 02:49 -0500
      Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Luis Lavena <luislavena@gmail.com> - 2011-05-13 06:50 -0700
        Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Nikolai Weibull <now@bitwi.se> - 2011-05-13 09:25 -0500
          Re: RubyGems 1.8 treats warnings as errors for C extensions, fails to install RedCloth? Luis Lavena <luislavena@gmail.com> - 2011-05-13 08:20 -0700

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