I have a solution with 30+ projects. One IDL file is always rebuilt.
It is quite annoying because more than 20 projects include the
generated header file in their precompiled header files.

The IDL file is in the project directory and has only these imports

import "oaidl.idl";
import "ocidl.idl";
import "oledb.idl";

there are no preprocessor directives in the IDL file.

The file is built with /notlb.
/out is set to $(SolutionDir)RelPath (outside the project dir).
/dlldata is set to another path $(SolutionDir)PS\dlldata.c.
/target nt50 is set.

I'm using MIDL Compiler Version 6.00.0359

Any enlightment is greatly appreciated.

tia
hg

I believe there are rebuild issues surrounding the use of macros in your
project settings.  Try removing the macros and see if it still happens.

-Sean

Sean,

It works right now for some reason (without any change; macros still in).

But somehow i have got a creep feeling that I'll soon give your suggestion
a try :-).

Thanks anyway
-hg

Have you changed the installation location of your PSDK in any way between
the 2 occurences? (when it did rebuild and when it didn't?)

We are aware of an issue where if you install the PSDK to a location that is
not the default, we scan the PSDK headers for dependencies and the engine
gets a bit confused by the if defs. If the PSDK is in a different location
you need to add that path to sysincl.dat

For more information on how to tell the project system to ignore certain
folders when scanning for dependencies see link below:
ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.1033/vccore/html/_core_Excluding_F
iles_When_Dependency_Checking.htm

Thanks,
Diana Kumar

See inline.

Nope. But the problem shwoed up again.

ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.1033/vccore/html/_core_Excluding_F
Adding the PSDK directory to the sysincl.dat solved my problem.
I checked this article before ( well in the MSDN version that shipped with
VC7 RTM) but had a typo in the path *ov*.

BTW: The SDK is installed in its default directory but on a
german OS ( i.e. in C:\Programme\Microsoft SDK).

Thanks for your assistance

Regards
-hg