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Linking Turbo C modules with TASM modules

Posted on 1997-05-08
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Last Modified: 2010-08-05
Can someone please give me a complete description on how you link Turbo C modules with TASM modules?  I keep getting "Undefined symbol" messages in Turbo C (I'm trying to link a TASM module into my Turbo C program).
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Question by:Jello
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Expert Comment

by:emmons
ID: 1250299
Are you getting a large number of UNDEFINED SYMBOL messages?
Would you give an example of the message that you receive as well as the function that you intend to call?
It is probably a matter of ornamentation or case.
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emmons earned 200 total points
ID: 1250300
I am getting ready to go home, so I thought that I would dump all the various possibilities that I could think of and let you see what is what.
Is the assembly module of your own creation:
   do you have underscores in front of any external labels?
   are you assembling with the /ml switch to preserve case?
In the function prototype, do you declare it 'extern "C" '?
If the librariy is not of your creation, and a quick look with a binary editor shows that the functions are all in upper case, you can either swtich your function names (prefereable) or set the linker to be case insensitive.
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Author Comment

by:Jello
ID: 1250301
Perfect... it works fine now.  I wasn't using the /ml option on TASM.  Thanks a lot. :)

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