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Bug 1540

Summary: SDL 2.0 won't link on Visual Studio 2012 RC for x64
Product: SDL Reporter: Marek Pokorny <marek3141>
Component: hapticAssignee: Edgar Simo <bobbens>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: blocker    
Priority: P2    
Version: HG 2.0   
Hardware: x86_64   
OS: Windows 7   

Description Marek Pokorny 2012-07-09 11:16:52 UTC 
I don't know if this is the right place for this, but here it goes.

SDL 2.0 fails to link on Visual Studio 2012 RC. It does fine for 32 bit, but for 64 bit it fails with these errors:

1>     Creating library x64\Release\SDL.lib and object x64\Release\SDL.exp
1>SDL_syshaptic.obj : error LNK2019: unresolved external symbol memcpy referenced in function SDL_SYS_HapticOpen
1>SDL_windowsmodes.obj : error LNK2001: unresolved external symbol memcpy
1>x64\Release\SDL.dll : fatal error LNK1120: 1 unresolved externals

I'm using the June 2010 DirectX SDK, and I'm using the visual studio 2010 project (converted to vs2012 project)
Comment 1 Edgar Simo 2012-07-09 13:27:50 UTC 
Sam, all function calls are to SDL_memcpy not memcpy. So perhaps it is being detected as HAVE_MEMCPY when it shouldn't? Don't know why the error doesn't reference other places, maybe it's just the first time it finds it?
Comment 2 Marek Pokorny 2012-07-09 15:29:21 UTC 
I think I found the problem. In SDL_stdlib.c line 37:

/* The optimizer on Visual Studio 2010 generates memcpy() calls */
#if _MSC_VER == 1600 && defined(_WIN64) && !defined(_DEBUG)
#include <intrin.h>

#pragma function(memcpy)
void * memcpy ( void * destination, const void * source, size_t num )
{
...


When I changed it to _MSC_VER == 1700 (the version used for vs2012rc) it compiled and linked perfectly. Perhaps this should be changed to _MSC_VER >= 1600.
Comment 3 Sam Lantinga 2012-07-11 05:58:18 UTC 
Fixed, thanks!
http://hg.libsdl.org/SDL/rev/3ef4d0e923cb