#define _AFX_NO_DEBUG_CRT causes a stream of compilation errors

Question

I have an MFC C++ project compiler under Visual Studio 2008.

I'm adding a _AFX_NO_DEBUG_CRT in my stdafx.h before the #include to avoid all the debug new and deletes that MFC provides (I wish to provide my own for better cross platform compatibility).

However when I do this I get a stream of errors such as the following:

>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2059: syntax error : '__asm'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ')' before '{'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ')' before '{'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ')' before '{'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ';' before '{'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : warning C4091: '' : ignored on left of 'int' when no variable is declared
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ';' before 'constant'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ';' before '}'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2143: syntax error : missing ';' before ','
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2059: syntax error : ')'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2059: syntax error : ')'
1>c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\afxtls_.h(62) : error C2059: syntax error : ')'
1

I "think" it may have something to do with an __asm int 3 call but I cannot be sure. Has anyone had this problem before? If so, how did you fix it? Am i stuck with MFC's memory tracking? I really hope not because it will make my libraries a lot less cross platform :(

Any help would be hugely appreciated!

Answer 1

Try putting the #define in your project compile options rather than at the top of stdafx.h.

How can you expect to build a cross-platform library if you're using MFC? Avoiding the new and delete overloads won't make a difference.

Moreover, you'll never write allocation trackers as reliable and complete as those provided by MFC. YAGNI, focus on developing your actual application.

Answer 2

I've come up with one method which involves using the /FORCE:MULTIPLE command line to force it to use mine instead of the MFC one. It all seems to be working quite nicely. I can, now, even track "mallocs" and "new"s performed by functions not owned by me :)

If anyone has any better solutions then please post them but for now this seems to solve my problem :)

Answer 3

I tried messing with the _AFX_NO_DAO_SUPPORT macro in the past and all it did was lead to endless crashes. I eventually came across this article:

PRB: Problems Occur When Defining _AFX_NO_XXX

It doesn't specifically list the one you are attempting to use, but it may still apply.