From: Luis Lavena <luislavena@...>
Date: 2007-12-24T00:15:00+09:00
Subject: Re: Problem building Ruby addon with Vista

On 23 dic, 11:11, "Julian Harnath" <julian.harn...@rwth-aachen.de>
wrote:
> Hello!
>
> I'm currently looking into developing Ruby addons. I'd like to use Windows
> Vista with VC++ 2005 as development platform. But I have a problem which
> seems to be related to some DLL incompatibility.
> My addon is currently empty, it only contains an empty init function. But
> as soon as I try to use it I get the following error when trying to run it:
>
> "The procedure entry point "_except_handler4_common" could not be located
> in
> the dynamic link library MSVCR80.dll"
>
> Searching google for "_execpt_handler4_common" results in various pages
> describing similiar problems (although none of them is related to Ruby).
> It seems to be some internal execption handler function which is only
> present in Vista. I suspect that the "msvcrt-ruby18.dll" which comes with
> the Windows build of Ruby is incompatible with the libraries used by
> Visual Studio 2005 (SP1) on Vista.
>

Yes, msvcrt-ruby18 is build with VC6, which link to MSVCRT.dll
(version 6.0).

to make Ruby MSVCR80.dll -compatible, you need to build ruby by
yourself, also compiling all the ruby dependencies with it, since you
can ran into cross-runtime malloc/free issues and random crashes.

There are a few looong threads you can search on google groups about
this (ruby-talk and ruby-core).

> Does anyone have an idea how to fix this? Did anyone successfully compile
> a Ruby addon with Vista, and if yes, how?

There is a lot of manual hacking in rbconfig.rb to make it work. I
suggest avoid it and use the path I described earlier, or just drop VC
+ 2005 and use MinGW.

Regards,

Luis Lavena