From: Kaye Ng <sbstn26@...>
Date: 2011-10-16T11:10:51+09:00
Subject: 'gem install' help please

Hi.

When I type 'gem install RedCloth' in the command line, I get this:
---------------------------------------------------------------------------
C:\Users\Kaye>gem install RedCloth
Building native extensions.  This could take a while...
ERROR:  Error installing RedCloth:
        ERROR: Failed to build gem native extension.

C:/Ruby192/bin/ruby.exe extconf.rb
checking for main() in -lc... *** 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
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=C:/Ruby192/bin/ruby
        --with-redcloth_scan-dir
        --without-redcloth_scan-dir
        --with-redcloth_scan-include
        --without-redcloth_scan-include=${redcloth_scan-dir}/include
        --with-redcloth_scan-lib
        --without-redcloth_scan-lib=${redcloth_scan-dir}/lib
        --with-clib
        --without-clib
C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed
to genera
te an executable file. (RuntimeError)
You have to install development tools first.
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:748:in `block in
have_library'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:693:in `block in
checking_for'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels)
in postp
one'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block in
postpone'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
        from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:743:in `have_library'
        from extconf.rb:5:in `<main>'


Gem files will remain installed in
C:/Ruby192/lib/ruby/gems/1.9.1/gems/RedCloth-
4.2.8 for inspection.
Results logged to
C:/Ruby192/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.8/ext/redclot
h_scan/gem_make.out

C:\Users\Kaye>
-------------------------------------------------------------------------

I have no idea why this happened and no idea how to install it properly.
I'm just following instructions from a book. If you have the time,
please elaborate on your answers.

Thanks guys!!!

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