Getting full path to a dynamic library?

Sebastian Trueg trueg at
Wed Dec 3 19:52:57 GMT 2008

Thiago Macieira wrote:
> On Wednesday 03 December 2008 16:42:57 Sebastian Trueg wrote:
>> Thiago Macieira wrote:
>>> On Wednesday 03 December 2008 13:37:10 Sebastian Trueg wrote:
>>>> As far as I can tell QLibrary only gives us the filename of a
>>>> dynamically loaded library. However, I need to determine the full path
>>>> for usage in ODBC. Does anyone know how to determine that in a platform
>>>> independent manner?
>>> Sorry, what?
>>> Are you talking about QLibrary::fileName() ?
>> :)
>> well, an example. I need the full path "/usr/local/lib64/"
>> and all I know is the name of the lib, ie. "virtodbc". Now QLibrary can
>> find the lib AFAIK using the dynmic linker:
>> QLibrary lib( "virtodbc" );
>> lib.load();
>> now the lib can be used. Thus, the path to the lib file has to be
>> available somewhere. However, the documentation of QLibrary states that
>> fileName will only return "" without the dir path.
> It returns whatever succeeded in dlopen().
> Since the full path was found by libdl itself, not QLibrary, it has no way of 
> knowing the path either.
> Why do you need the full path? dlopen("") works just fine.

like I said: ODBC driver. but it works now. At least on Linux. Win and 
Mac are another question.

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