On Fri, 28 Dec 2007, Jan Dubois wrote:

>  On Fri, 28 Dec 2007, William A. Rowe, Jr. wrote:
[ ... ]
> >>> My instinct, with 2008 adding the new SDK features for apr such as
> >>> multicast group filtering, and the continued availability of a 2008
> >>> 'express'/'lite' free version, is to take httpd 2.4 (3.0?) binaries
> >>> for apache httpd to this 2008 release. Yes, probably retain either
> >>> .dsp files, or a makefile structure which allows folks to build to
> >>> anything from VC6 to a 'plain SDK' (it now includes the compilers
> >>> and tools), but for binaries, this will become foobar for folks who
> >>> use ActiveState.
> >>
> >> Why? What problems are going to happen?
> >
> > The major class of problems happens that there is one posix files
> > table per linked clib, one memory pool per linked clib, etc. When
> > resources cross from one to the next, that's the crux of the issue.
> 
>  Sure, but how do resources cross?  Isn't this always a module bug
>  to start with?  Note that I have virtually no experience with the
>  particular issues you may see with Perl inside Apache, but I've
>  worked on many Perl embedding scenarios, putting Perl into COM
>  controls, Windows services and .NET applications, so I'm well aware
>  of the general issues, and how to solve them/work around them.
> 
>  Therefore I'm genuinely interested to learn where the problems are
>  if you build say Apache with VS2008, Perl with VC6 and e.g. mod_perl
>  with VC7.  I would expect this to work just fine if we ignore the
>  address space wasted by essentially unused surplus clibs.

I'm not sure if this is a clean example, but there was
a report:
   http://marc.info/?l=apache-modperl&m=119140365320503&w=2
where mod_perl and Apache (compiled with VC8) did not
work with ActivePerl (VC6), whereas switching to a mod_perl
compiled with VC6 with the same Apache and Perl
did (seemingly) work.

Also, Steve Hay reports that his Win32::SharedFileOpen
module:
  http://search.cpan.org/src/SHAY/Win32-SharedFileOpen-3.36/INSTALL
and his Win32::UTCFileTime module:
  http://search.cpan.org/src/SHAY/Win32-UTCFileTime-1.46/INSTALL
will only work with ActivePerl when they're compiled with
VC6.

-- 
best regards,
Randy