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From:	Dave Bodenstab <dave_bodenstab AT sbcglobal DOT net>
Subject:	Re: Can't link TclMagick anymore
Date:	Thu, 10 Aug 2006 01:08:35 -0500
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Danny Smith wrote:
> Sorry about breaking thread.  I suppose I should give in and
> re-subscribe here.
> Dave Bodenstab wrote at
> http://cygwin.com/ml/cygwin/2006-08/msg00264.html
> 
> 
>> Warning: .drectve `-defaultlib:MSVCRT ' unrecognized
>> Warning: .drectve `-defaultlib:OLDNAMES ' unrecognized
> 
> These are harmless
> 
>> Cannot export ??_C AT _03KBFG@Tcl?$AA@: symbol not found
>> Cannot export ??_C AT _0DM@EBFE AT This?5interpreter?5does?5not?5suppor@:
> symbol not found
> 
> My MSVC++ 'demangle fu' is not up to that  
> Those must be from tclstub84.lib (tclStubLib.obj), yes?
> 
> By not explicitly telling ld what to export, you are implicitly telling
> it to export-all symbols from all your objects and archives, excluding a
> few system libs. Tell ld to exclude tclstub84.lib from exports, as well 
> 
> 
> $ gcc -v -shared -mno-cygwin \
> -o libTclMagick.dll \
> -L'/cygdrive/c/Program Files/ImageMagick' \
> TclMagick.o \
> -ltclstub84  \
> -lCORE_RL_wand_ -lCORE_RL_magick_ \
> -Wl,--exclude-libs,tclstub84.lib

That did it.  Thanks much.

Where can I learn about this "export" stuff?  I've never, ever had to 
"export" anything (via ld) when making a .so on unix -- it's all done
(for C) by *not* declaring a symbol as "static".  Any suggestion on
a tutorial that explains the how and why when linking dll's on
windows?

Thanks again.


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