Misc linker errors when moving to /clr

[ralphsieminsky@hotmail.com]

A project compiles fine under VS 2005 RC without the /clr
option. However, when /clr is turned on several errors appear:

- A symbol exported from a DLL is not found by another
DLL referencing it.

The name of the symbol present in the DLL, as shown by
depends.exe is ?Apply@ScreenCo ntext@@SGPAV1@P AUHWND__@@@Z

But the name of the symbol the linker looks for when
it tries to build the DLL depending on it is
?Apply@ScreenCo ntext@@$$FSGPAV 1@PAUHWND__@@@Z

Strangely enough, the two symbol have exactly the same
undecorated name

- The second error is the following
mfcs80ud.lib(dl lmodul.obj) : error LNK2005: _DllMain@12 already defined
in msvcrtd.lib(dll main.obj)

http://support.microsoft.com/default.aspx?scid=kb;en-us;q148652

seems to talk about it, but there is no way I could get
to make its workarounds solve the problem (the instructions don't apply
to VS2005). But why would it manifest itself only in /clr mode ?


Any clue is much appreciated !

Cheers,
Ralph

[bonk]

Re: Misc linker errors when moving to /clr

I had a similar (maybe the same ?) issue but with VS 2005 Beta 2.
It is described here:

http://lab.msdn.microsoft.com/productfeedback/viewfeedback.aspx?feedbackid=60df170e-cf8d-4d75-8434-54741ae3f773

Now it also says there this bug is resolved in a later build after Beta
2. Now I am quite shocked that this might not be the case since you are
using VS 2005 RC. However it seems that I found a workaround wich I
reported here:

http://lab.msdn.microsoft.com/ProductFeedback/ViewWorkaround.aspx?FeedbackID=FDBK27870#1

ralphsieminsky@ hotmail.com schrieb:[color=blue]
> A project compiles fine under VS 2005 RC without the /clr
> option. However, when /clr is turned on several errors appear:
>
> - A symbol exported from a DLL is not found by another
> DLL referencing it.
>
> The name of the symbol present in the DLL, as shown by
> depends.exe is ?Apply@ScreenCo ntext@@SGPAV1@P AUHWND__@@@Z
>
> But the name of the symbol the linker looks for when
> it tries to build the DLL depending on it is
> ?Apply@ScreenCo ntext@@$$FSGPAV 1@PAUHWND__@@@Z
>
> Strangely enough, the two symbol have exactly the same
> undecorated name
>
> - The second error is the following
> mfcs80ud.lib(dl lmodul.obj) : error LNK2005: _DllMain@12 already defined
> in msvcrtd.lib(dll main.obj)
>
> http://support.microsoft.com/default...;en-us;q148652
> seems to talk about it, but there is no way I could get
> to make its workarounds solve the problem (the instructions don't apply
> to VS2005). But why would it manifest itself only in /clr mode ?
>
>
> Any clue is much appreciated !
>
> Cheers,
> Ralph
>[/color]

[ralphsieminsky@hotmail.com]

Re: Misc linker errors when moving to /clr

Thanks for this, bonk. The workaround did not work for
me but the comments helped me get a version to compile
....in Release Mode. All the issues have disappeared.

So the linker problems seem to apply to Debug Mode only.

For information, in Debug Mode I also had other
unresolved tokens, for symbols that happened to
be #included through header files but actually
not referenced in the code. Putting the linker
in verbose mode revealed that it was looking for
those symbols during a "Search transition" phase.
Thus possibly the linker is trying to resolve more
symbols than required in Debug Mode.

Cheers,
Ralph

bonk wrote:[color=blue]
> I had a similar (maybe the same ?) issue but with VS 2005 Beta 2.
> It is described here:
> http://lab.msdn.microsoft.com/produc...4-54741ae3f773
>
> Now it also says there this bug is resolved in a later build after Beta
> 2. Now I am quite shocked that this might not be the case since you are
> using VS 2005 RC. However it seems that I found a workaround wich I
> reported here:
> http://lab.msdn.microsoft.com/Produc...ID=FDBK27870#1
>
>
>
> ralphsieminsky@ hotmail.com schrieb:[color=green]
> > A project compiles fine under VS 2005 RC without the /clr
> > option. However, when /clr is turned on several errors appear:
> >
> > - A symbol exported from a DLL is not found by another
> > DLL referencing it.
> >
> > The name of the symbol present in the DLL, as shown by
> > depends.exe is ?Apply@ScreenCo ntext@@SGPAV1@P AUHWND__@@@Z
> >
> > But the name of the symbol the linker looks for when
> > it tries to build the DLL depending on it is
> > ?Apply@ScreenCo ntext@@$$FSGPAV 1@PAUHWND__@@@Z
> >
> > Strangely enough, the two symbol have exactly the same
> > undecorated name
> >
> > - The second error is the following
> > mfcs80ud.lib(dl lmodul.obj) : error LNK2005: _DllMain@12 already defined
> > in msvcrtd.lib(dll main.obj)
> >
> > http://support.microsoft.com/default...;en-us;q148652
> > seems to talk about it, but there is no way I could get
> > to make its workarounds solve the problem (the instructions don't apply
> > to VS2005). But why would it manifest itself only in /clr mode ?
> >
> >
> > Any clue is much appreciated !
> >
> > Cheers,
> > Ralph
> >[/color][/color]

[ralphsieminsky@hotmail.com]

Re: Misc linker errors when moving to /clr


Ahem, I'd like to recall my previous message, because
the /clr option was not applied to all subprojects in
Release Mode (probably my mistake)...

The issues are the same in Release Mode as in Debug Mode.

Cheers,
Ralph