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Re: Can't link TclMagick anymore


Dave Bodenstab wrote:
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@_03KBFG@Tcl?$AA@: symbol not found
Cannot export ??_C@_0DM@EBFE@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?


I'd recommend going to the source for information on DLLs:

<http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/HTML/_core_dlls.3a_.overview.asp>


-- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746

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