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Am 26.08.2010 18:10, schrieb Tim Ss:
> 
> Where or how do I get this C compiler. The book mentions nothing about
> it.


At first, you need to know that RubyGems can be written in other
languages than Ruby, notably C. That's useful, because it enables one to
extend Ruby with capabilities that aren't accessable otherwise and
although the vast majority of gems is written in pure Ruby and doesn't
need a C compiler there are sometimes exceptions as RedCloth.
The reason why your book doesn't mention this is probably because it's
contents weren't tested with a Windows system. Many Ruby developers run
Linux distributions, and Linux always comes with GCC, the GNU C
Compiler, already installed. Same goes for Macs I suppose, although I
never had one.

Your starting point to the devkit should be here I suppose:
http://rubyinstaller.org/add-ons/devkit/

Vale,
Marvin
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