I am trying to get boost asio to work with my code (which is using 4 byte struct member alignment and  _cdecl calling convention).  I get the following error when calling asio::async_write:



Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call.  This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.



What am I missing?  I have read everything on ABI that I can find:

http://www.boost.org/development/separate_compilation.html



I changed boost\config\abi\msvc_prefix.hpp to use #pragma pack(push,4).



I also am using the command line option for bjam:

cxxflags="/Zp4 /Gd"



The Microsoft documentation seems to indicate that the /Zp should override the #pragma if the #pragma is larger or equal:

http://msdn.microsoft.com/en-us/library/ms253935.aspx

http://msdn.microsoft.com/en-us/library/46t77ak2.aspx



Any help would be greatly appreciated,

Brian