From: "marcel.luethi@..." <marcel.luethi@...>
Date: 2008-09-16T15:57:42+09:00
Subject: Annoying problem: gems tries to build native extension

Hi All,

I have an annoying problem using gems.
Yesterday I wanted to update all my gems to their latest version.
For hpricot unfortunately I answered the question "Select which gem to
install for your platform (i386-mswin32)" with "1" -> hpricot-0.6.16
(ruby)
I knew immediately this was wrong...
It tried to build the native extension but I don't have any VC
compiler installed therefore it stopped updating the gems.

I cleaned hpricot-0.6.161 from gems\1.8\cache\, gems\1.8\specifications
\ & gems\1.8\gems\
That didn't help, still the same:

C:\ruby>gem update
Updating installed gems
Updating hpricot
Building native extensions.  This could take a while...
ERROR:  While executing gem ... (Gem::Installer::ExtensionBuildError)
    ERROR: Failed to build gem native extension.

c:/ruby/bin/ruby.exe extconf.rb update
checking for stdio.h... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --srcdir=.
        --curdir
        --ruby=c:/ruby/bin/ruby


Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/
hpricot-0.6.16
1 for inspection.
Results logged to c:/ruby/lib/ruby/gems/1.8/gems/hpricot-0.6.161/ext/
fast_xs/gem_make.out


Because it installed not correctly "gem list --local" shows "hpricot
(0.6)" and therefore uninstalling doesn't work:

C:\ruby>gem uninstall hpricot -v '0.6.161'
ERROR:  While executing gem ... (Gem::InstallError)
    Unknown gem hpricot = 0.6.161


I uninstalled Ruby totally and reinstalled it from scratch - but the
problem is still the same!
Here is my environment:

C:\ruby>gem environment
RubyGems Environment:
  - RUBYGEMS VERSION: 1.2.0
  - RUBY VERSION: 1.8.7 (2008-05-31 patchlevel 0) [i386-mswin32]
  - INSTALLATION DIRECTORY: c:/ruby/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: c:/ruby/bin/ruby.exe
  - EXECUTABLE DIRECTORY: c:/ruby/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-mswin32-60
  - GEM PATHS:
     - c:/ruby/lib/ruby/gems/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/


Does anybody know why it still tries to install this hpricot-0.6.161
(ruby)?
Is there somewhere a cache (outside of the Ruby dir) from which it is
loaded?
Any help is highly appreciated!

Thanks!

Marcel