[GD-General] Re: multiply defined functions in libs

[Andras B. <bn...@ma...>]

[note: I moved this thread to gamedevlists-windows]

I'm also fighting with this problem right now. For me the linking error only
happened in the debug build (couldn't figure out why). What I did to solve
this was to link against LIBC instead of LIBCD (since I don't really need
the debug version of that library anyway).. So now I have my own malloc in
place, but this brings some other problems:

WinMainCRTStartup calls malloc to allocate some memory, and then uses the
Win32 API function ::HeapSize to query the size of that same memory block..

So it assumes, that malloc uses ::HeapAlloc with the handle _crtheap, but of
course, in this case, it does not (since it is my routine that gets called
instead)

So, I'm also stuck.. What can I do? Do I have to roll my own crt routines??
This sounds a bit too hardcore. I would have thought that many people use
their own memory manager. But how do they solve these things??

Any ideas are welcome!

Thanks,


Andras

> -----Original Message-----
> From: gam...@li...
> [mailto:gam...@li...] On Behalf Of
> Brett Bibby
> Sent: Tuesday, June 08, 2004 7:58 PM
> To: Gam...@li...
> Subject: [GD-General] multiply defined functions in libs
> 
> I have no idea where to ask this quesiton, so I guess general might be
> okay.
> 
> Recently I have switched our memory management to Doug Lea's malloc and so
> far so good.  The biggest problem is that I'm trying to drop in and
> replace
> the normal ansi calls.  This generally works although with different side
> effects on different platforms.  For example, CodeWarrior's linker emits a
> warning that multiple "malloc" symbols are defined on Win32, but correctly
> chooses to use mine anyway if I set the link order correctly, and emits no
> warnings at all on PS2 and GCN and seems to use mine silently (although
> the
> original malloc is listed in the linker map, just unused!).  On MSVC it is
> an error and won't build the Win32 version.  Since we have 18 target
> builds
> across mutliple platforms this is messy.  I can't remove the offending
> libraries without also removing a bunch of needed functions as they are
> built into a single library.
> 
> Is there any sort of pragma or some other way to make sure that all
> references to memory management functions only see my definition?  It
> seems
> that many people must have done this before....
> 
> If not, the only way I see to fix this properly is to build custom release
> and debug libs from each platform's source and exclude the functions I
> want
> to remove <shudder>.
> 
> Brett
> 
> 
> 
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