linker crash in C++/QTwhile access DLL file

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Hi,
I am trying to access my API functions from DLL file. but getting this error
"The program has unexpectedly finished."
C:\MyDevelopment\build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug\debug\PcanPortLinker.exe crashed

My DLL file config is as following.

LIBS += "C:/MyDevelopment/PcanLinker/build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug/debug/PCANBasic.dll"

Any help/suggestion/experience sharing would be appreciated.
Thanks

Posted 1-Nov-15 22:33pm

Ramiien

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Richard MacCutchan 2-Nov-15 4:55am

You should not add the DLL to your LIBS variable. Add the corresponding .lib file.

Ramiien 2-Nov-15 5:04am

you means lib file of the API?? how lib file access DLL file?

Richard MacCutchan 2-Nov-15 7:03am

The .lib file contains the information about the external functions that the application needs. The linker adds these to the final project which provides the details for the Windows loader to find the relevant DLL at run time.

Ramiien 2-Nov-15 7:19am

so i need to include only PCANBasic.lib file in my .pro file and place the PCANBasic.dll in the same folder.
e.g
#LIBS += "C:/MyDevelopment/PcanLinker/includes/PCANBasic.lib"
and PCANBasic.dll into the includes folder.
this what you means?

Richard MacCutchan 2-Nov-15 7:43am

The DLL file needs to be in the same directory as the final exececutable, or one of the directories in the Windows' PATH environment variable.

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griffwk · Answer 1 · 2015-11-08T20:02:00

Solution 1

To really see what's going on, you need to run your program under the debugger, and when the exception occurs, trap it, and post the debugger info here.

i.e. Exception type, stack trace, source code on which the error occurs, etc.

then, we might be able to pinpoint your problem

gwk

Posted 8-Nov-15 20:02pm

griffwk

Comments

[no name] 9-Nov-15 2:24am

This is a comment not a solution.

griffwk 9-Nov-15 19:58pm

well. without the info I outlined--you are almost certain to *never* get a complete solution...

[no name] 9-Nov-15 20:42pm

Has nothing to do with my point - a request for information is not a solution and should not be posted as such.