[Rubyinstaller-devel] MingW VS VS6

Luis Lavena luislavena at gmail.com
Thu Aug 7 09:58:23 EDT 2008

On Thu, Aug 7, 2008 at 3:47 PM, Fabio Akita <fabioakita at gmail.com> wrote:
> I've been recommending people to use the newest Ruby Installer, which uses
> MingW to build itself but install the old VS6 compiled gems (such as
> sqlite3-ruby), mainly using the --platform=mswin32 with the gem install
> command.
> Then someone asked me if this was a good idea because there could be some
> binary level incompatibility between the interpreter and libraries
> compilations.
> Does anyone know of any problematic case about this, or it is not a problem?

Some people say that there is no problem, since MinGW states to be
binary compatible with VC6.

On the other hand, sometimes depending on the type of that being
exchanged between the linked libraries or the program itself, it send
data wrongly aligned, which produces a segfault.

I got hit by this dealing with MySQL gem... several times. MySQL gem
built with VC6 and MinGW installation.

For that purpose I created a mingw gem that you can install from here:

gem install mysql --source http://gems.rubyinstaller.org

Also you will find there a win32console compilation based on my fork in GitHub.

Some gems can be easily built with the DevKit, like RedCloth 4 without
external dependencies.

There are other problems about platforms like RUBY_PLATFORM regexp
that can interfere with the actual code execution.

So sometimes issuing a --platform=mswin32 will not fix the issue, but
generate some random errors (like Mongrel 1.1.5 a few weeks ago, mea

Luis Lavena
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