http://d.puremagic.com/issues/show_bug.cgi?id=4295

           Summary: IID_IUnknown symbol undefined in phobos.lib
           Product: D
           Version: 2.041
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: link-failure, rejects-valid
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: mrmocool@gmx.de


--- Comment #0 from Trass3r <mrmocool@gmx.de> 2010-06-08 10:24:18 PDT ---
std.c.windows.windows defines extern IID IID_IUnknown (and later uses it in
ComObject)
but the linker complains that the symbol is undefined.

Replacing it with

IID IID_IUnknown = {0x00000000, 0x0000, 0x0000, [0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46]};

makes it work, but I'm not sure if this is the correct GUID.

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Rainer Schuetze <r.sagitario@gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |r.sagitario@gmx.de


--- Comment #1 from Rainer Schuetze <r.sagitario@gmx.de> 2010-06-08 11:04:02 PDT ---
You need to link against uuid.lib to resolve the symbol.

I don't think it is possible to add a pragma(lib,"uuid") upon usage, so this
should be mentioned somewhere (maybe
http://www.digitalmars.com/d/2.0/COM.html).

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Trass3r <mrmocool@gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |spec


--- Comment #2 from Trass3r <mrmocool@gmx.de> 2010-06-08 11:28:05 PDT ---
Ah thanks. Then it should be fixed in the docs.
Also at http://digitalmars.com/d/2.0/dll.html#com

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--- Comment #3 from Trass3r <mrmocool@gmx.de> 2010-06-08 11:30:20 PDT ---
Just found out that pragma(lib, "uuid") is actually present in
std.windows.iunknown!

But this one is more or less obsolete.
std.c.windows.com contains more functionality and also the ComObject class that
is mentioned in the docs IIRC.

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla@digitalmars.com


--- Comment #4 from Walter Bright <bugzilla@digitalmars.com> 2010-09-27 19:53:52 PDT ---
#pragma(lib, "uuid") is already present in std.c.windows.com.

So, I need an example of code where the link is failing due to not linking against uuid.lib.

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--- Comment #5 from Rainer Schuetze <r.sagitario@gmx.de> 2010-09-27 23:05:55 PDT ---
The pragma was added by Andrei in the meantime, so you might consider it fixed.

Please consider deprecating/removing std.windows.iunknown, because it only duplicates part of the code in std.c.windows.com which can lead to confusion.

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Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |andrej.mitrovich@gmail.com
         Resolution|                            |FIXED


--- Comment #6 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-05-24 21:01:55 PDT ---
If it's fixed, we shall close it. :)

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--- Comment #7 from Trass3r <mrmocool@gmx.de> 2011-05-25 06:29:08 PDT ---
It isn't fixed, std.windows.iunknown is still present.

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Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |


--- Comment #8 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-05-25 07:23:16 PDT ---
Okie no more monkey-business from me.

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--- Comment #9 from github-bugzilla@puremagic.com 2012-01-23 18:05:47 PST ---
Commit pushed to https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/5ad3dafd10002983fe92907c14ff5e8322c22d86 fix Issue 4295 - IID_IUnknown symbol undefined in phobos.lib

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