MySQL Bugs: #12759: Linking with mysqlclient.lib and VC 6.0 gets __aligned

Bug #12759	Linking with mysqlclient.lib and VC 6.0 gets __aligned_malloc/free undefined
Submitted:	23 Aug 2005 16:11	Modified:	23 Aug 2005 18:04
Reporter:	Anders Karlsson	Email Updates:
Status:	Can't repeat	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	5.0.11	OS:	Windows (Windows)
Assigned to:		CPU Architecture:	Any

Description:
This seems to be related MySQL being built with VC 7/.NET. These two are two only two issues. This only happens when linking with libmysql.lib, only when linking with mysqlclient.lib. This might be a non-issue, but this worked at least in 5.0.4 I think, and as the move from VC6 to VC7 support isn't documented, this may be a bug, in particular as libmysql.lib works.

I'm not sure if this is a bug or not, but wanted to report it for future reference for anyone else having this problem.

How to repeat:
Compile and build any simple MySQL C-program on windows XP using C 6.0. You will get 2 unresolved externals.

A W/O is rebuilding mysqlclient.lib from source with VC6.0, which works without problems, and then linking the application with this rebuilt mysqlclient.lib.

My language was a bit unclear, I meant to say:
This doesn't happen when linking with libmysql.lib,
only when linking with mysqlclient.lib.

Below the steps I did:

1- Downloaded and installed the mysql-noinstall-5.0.11-beta-win32.zip package.
2- Created an empty project with VC++ 6.0 console type.
3- Added a new file and edited the below code:

#include <stdlib.h>
#include <stdio.h>
#include <my_global.h>
#include "mysql.h"

int main()
{
  MYSQL* mysql;
  mysql= mysql_init(NULL);
  mysql_options(mysql,MYSQL_SET_CHARSET_NAME,"cp1251");
  mysql_real_connect(mysql,"localhost","root","","test",0,NULL,0);
  printf("Server version: %s\n", mysql_get_server_info(mysql));
  mysql_close(mysql);
  return 0;
}

4- In C++ Settings tab:
    debug
    Preprocessor -> ..\include
    Code Generation -> Debug Multithreaded
   
    Release
    Preprocessor -> ..\include
    Code Generation -> Multithreaded

5- Link Settings Tab:

    Added the below libraries:
    debug
    wsock32.lib  ..\lib\debug\mysqlclient.lib
    
     release
     wsock32.lib ..\lib\opt\mysqlclient.lib

6- Compiled:

--------------------Configuration: bug12759 - Win32 Debug--------------------
Compiling...
bug12759.cpp
Linking...

bug12759.exe - 0 error(s), 0 warning(s)

--------------------Configuration: bug12759 - Win32 Release--------------------
Compiling...
bug12759.cpp
Linking...

bug12759.exe - 0 error(s), 0 warning(s)

6- Tested the application

C:\temp>bug12759
Server version: 5.0.11-beta-nt

I did just what you did, and I can't link that, due to those 2 unresolved externals. Strange. I think, but I'm guessing here, that this problem is due to MSVC runtime library changes, the two externals missing seems to have been added in msvcr71 or something like that. Might it be that you used VC6 but the new MSVC runtime library? Otherwise we'll just have to close this one I guess, until I can find out a way to reproduce this.

I have both version installed, but I think the libraries are installed
in their own install path. So I can't say you with accuracy if my
environment mask that issue, need to test with a clean machine.
Also my VC++ 6.0 is installed with SP 5 (I don't use SP 6).