[Qt-creator] How to include libraries in Qt

[Danny Price]

Unless your dll is in the same directory, qmake probably won't find it - you
need to include the full path, just as in MSVC.

Creator will force you to become a qmake expert, trust me :)

On Sat, Feb 13, 2010 at 1:22 AM, Krishna Achugatla <krishnaa at symbian.org>wrote:

> Hi Mark, Thanks. Still no luck, here I am explaining in detail.
>
> Hi,
>
> My objective is to create a shared library and link it with app and call
> some APIs of dll in the app.
>
> Platform Details:
> -----------------------
> Qt for Symbian 4.6.0
> Qt Creator 1.3.0
> S60 5th edition
> Abld is build system
>
> Below are the steps followed and issued faced.
>
> 1. Creating "App"
>    I created an app called "MyApp" using Qt-Creator "Qt4 Gui Application"
> option. Default tool chain used to build is GCCE and able to build it.
>
> 2. Creating "Shared Library"
>    I created a shared library called "MyDLL" using Qt-Creator option "C++
> Library" then "Shared Library". Default tool chain is GCCE and able to built
> it.
>
> 3. Link "Shared Library" with "App"
>    I don't find any good documentation of how to do this, the whole
> sequence of steps needed. I figured that LIBS needs.
>
>    Added below line to MyApp.pro file
>    LIBS    += -lMyDLL.dll
>
>    as suggested by qmake help, then building the app gives error
>
> make[2]: *** No rule to make target
> `\S60\devices\S60_5th_Edition_SDK_v1.0\epoc32\release\armv5\LIB\MyDLL.dso',
> needed by
> `\S60\devices\S60_5th_Edition_SDK_v1.0\epoc32\release\gcce\udeb\MyApp.exe'.
> Stop.
> make[1]: *** [TARGETMYAPP_0XE25A8EF2] Error 2
>
> Question is : I am working with tool chain GCCE, why make is looking into
> ARMV5 path?. i.e.
> `\S60\devices\S60_5th_Edition_SDK_v1.0\epoc32\release\armv5\LIB\MyDLL.dso
>
> 4. Trying to work with Tool chain ARMV5
>    First, I want to build the MyDLL with Armv5. I created a new project
> settings with tool chain as ARMV5, then build MyDLL. Following error occrued
>
>    Error: C0000U: Unrecognized option '--visibility_inlines_hidden'.
> make[2]: ***
> [\S60\devices\S60_5th_Edition_SDK_v1.0\EPOC32\BUILD\Qt-Projects\DLL\MyDLL\MYDLL_0XE11197E8\ARMV5\udeb\mydll.o]
> Error 1
> make[1]: *** [TARGETMYDLL_0XE11197E8] Error 2
>
>   The generated MyDLL_0xE11197e8.mmp file has the line
>   OPTION ARMCC --visibility_inlines_hidden --fpu softvfp
>
>
> I feel, creating a library is a very basic thing and it should be very easy
> for any body to do. There should be a single wiki page explaining all the
> steps with code whereever possible.
>
> I feel we should have detailed docmentation for Static Library, Shared
> Library and Plugins with code examples.
>
> Let me know if I miss any thing...
>
> -Krishna.
>
>
> On 11 February 2010 22:40, Ladnar, Marc <Marc.Ladnar at ksab.kroschu.com>wrote:
>
>>  Hi Krishna,
>>
>> ther is no difference in binding your static or dynamic library into
>> another app.
>> You just have to put this line into your app.pro file:
>> LIBS += -L[PATH_TO_YOUR_LIB] -l[LIB_NAME]
>> If your lib is called libxy, you will have to add -lxy, so leave the part
>> "lib".
>> Static libs are directly included into the binary, dynamic libs have to be
>> delivered with the app.
>>
>> Adding Plugins into your app needs the QPluginLoader, it is documented in
>> QtAssistant. Plugins have to be delivered with the app, too.
>>
>> Hope I could help, have a nice day.
>>
>> Marc Ladnar
>>
>>  ------------------------------
>>    *Von:* Krishna Achugatla [mailto:krishnaa at symbian.org]
>> *Gesendet:* Freitag, 12. Februar 2010 00:24
>> *An:* Qt-creator at trolltech.com
>> *Betreff:* [Qt-creator] How to include libraries in Qt
>>
>>   Hi,
>>
>>  I have created a Qt SharedLibrary (e.g. MySharedLibrary) using
>> Qt-Creator. I followed the navigation steps "File"->"New File or
>> Project->Projects"->"C++ Library". Then choose the "Type" as "Shared
>> Library", gave name and it created the Shared Library. The created shared
>> lib has the necessary declarations and defines wrt Q_DECL_EXPORT. I wrote
>> few functions in that class, so that they can be accessed in another
>> application.
>>
>>  How do I include this Shared Library as part of another Qt Application?.
>> What are the necessary changes required to make to .pro file (like adding
>> LIBS variable) and source files of the app?. Please let me know any
>> documentation is available. If the documentation explains with code, the
>> necessary changes then it becomes very easy for developers.
>>
>>  Similarly it is good to have documentation about other two types of
>> libraries, viz. "Statically linked library" & "Plugin", how to include them
>> in an application with example code.
>>
>>  -Krishna.
>>
>>
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>>
>
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