Moving from VC 6.0 to VC 2005

Question

Hi all,

I'm current investigating a way to move from Visual studio 6.0 to the lastest VS 2005. My project comprises with MFC, stl, and thirdparty libraries. When I test converting it to VS 2005 beta 2 the compiler generated 6500+ error.
Is there a better way to do this? Or is there a compiler switch that make the new compiler compatible with VS6.0 compiler?

Answer 1

Hi supra!

I'm current investigating a way to move from Visual studio 6.0 to the lastest VS 2005. My project comprises with MFC, stl, and thirdparty libraries. When I test converting it to VS 2005 beta 2 the compiler generated 6500+ error.
Is there a better way to do this? Or is there a compiler switch that make the new compiler compatible with VS6.0 compiler?

Errors or warnings?

Most warnings will disapear if you define thefollowing:
_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_USE_32BIT_TIME_T

But it is recommended, that you use the more secure versions of the CRT.

-- 
Greetings
  Jochen
 
   My blog about Win32 and .NET
   http://blog.kalmbachnet.de/

Answer 2

6406 Errors.493 warnings. These codes are truely legacy code date back by 10 years. I was hoping for some kind of compiler switch that make it backward compatible with VS60.

regards,
supra

Answer 3

You can try to post *some* of the errors... maby it is a common error...

Answer 4

You will need to go through the errors. This isn't normally just a compiler issue, but is a combination of compiler conformance and library changes. Generally, the 6500 instances will corespond to a fairly small set of distinct issues. We have done a decent number of porting labs with customers and normally successful in working through all the issues on a large code base in the space of a single day.

For the compiler breaking changes of the 2003 and 2005 release see:
http://msdn2.microsoft.com/library/4162y30b(en-us,vs.80).aspx

If you got lots of these warnings from the Secure CRT libraries, then see the following link for a temporary solution:
http://msdn2.microsoft.com/library/8ef0s5kh(en-us,vs.80).aspx

Ronald Laeremans
Visual C++ team