Re: problem with shared library ... linking error

[Jennifer Fell]

Thanks Ben for your answer. Well, I did read the article. The shared library 
is written in C. Even though my application uses C++, but I use C convention 
to call any methods in the shared library.

#ifdef __cplusplus
extern "C" {
#endif
// calls to shared library
#ifdef __cplusplus
extern "C" {
#endif
Should not it work?
Thanks,
Jenni
----- Original Message ----- 
From: "Ben Combee" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <palm-dev-forum@news.palmos.com>
Sent: Wednesday, March 09, 2005 10:28 AM
Subject: Re: problem with shared library ... linking error


At 07:24 AM 3/9/2005, you wrote:
Hello Everybody,
I am having a problem with using shared library in Codewarrior, and it is 
hapenning during link time. I have included the header file that has all 
the necessary APIs exposed for the shared library. However, the linker 
gives error for SOME of them (NOT for ALL):
  TManager:: 'T_free' referenced from 'TManager::TFree' is undefined.

How come other APIs are not causing any linking error and only this one 
(T_free) doing that. Here is a portion of the APIs for the shared library 
listed:

UInt32 T_reset();
UInt32 T_free();
UInt32 T_setParams (UInt16 controlID, UInt32 controlVal);
FYI, the T_reset and T_setParams are not causing any errors. I thought the 
linker did not need to link to the APIs during linking. Is there any 
setting in CodeWarrior that I need to do?

Thanks for your valuable time.
Palm OS 68K shared libraries don't support C++ -- did you read my article 
at palmos.combee.net about this topic?  The shared library model on Palm 
OS just can't support C++ methods because of the conflict between the 
hidden this pointer and the library reference in the parameter lists.

-- Ben Combee, Senior Software Engineer, palmOne, Inc.
   "Combee on Palm OS" weblog: http://palmos.combee.net/
   Developer Forum Archives:   http://news.palmos.com/read/all_forums/
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