I have Ruby compiling fine using Borlands (free) C compiler for Windows.
The only problem is I can't set where ruby is compiled to, it just 
installs it to the current directory (c:\ruby\src\ruby-1.8.4\bcc32\).
Normally you can add --prefix=c:\ruby\bin to the configure command and 
that sets the directory.

configure --prefix=c:\ruby\bin
make
make test
make install

I don't use C much so it maybe something basic...

Many thanks, K.

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