CODEWITHSUNDEEP
c++qtshared-librariesstatic-librariestaglib
Program-Me-Rev
Program-Me-Rev

Reputation: 6624

How to build C++ libraries for use in Qt

This question is related to this one I posted earlier : How to include a library in a Qt project.

I'm trying to create Qt a project that uses the TagLib library. I'm not really sure of how exactly to go about it.

I have downloaded TagLib 1.11.1.

I built it following steps in this tutorial:

Build zlib, by first having CMake create a Visual Studio solution file, then building this solution with Visual Studio:

mkdir build && cd build cmake .. -G"Visual Studio 14 2015 Win64" -DCMAKE_INSTALL_PREFIX="e:\workspace\lib\installed" msbuild /P:Configuration=Debug INSTALL.vcxproj msbuild /P:Configuration=Release INSTALL.vcxproj

Build TagLib much in the same way:

cd ....\taglib-1.11.1 mkdir build && cd build cmake .. -G"Visual Studio 14 2015 Win64" -DCMAKE_INSTALL_PREFIX="e:\workspace\lib\installed" -DZLIB_INCLUDE_DIR="e:\workspace\lib\installed\include" -DZLIB_LIBRARY="e:\workspace\lib\installed\lib\zlib.lib" -DWITH_ASF=on -DWITH_MP4=on -DBUILD_EXAMPLES=on msbuild /P:Configuration=Release INSTALL.vcxproj

This building procedure doesn't seem to work in a Qt project.

Could somebody please point me in the right direction as to how to build taglib Release 1.11.1 (Windows 10).

Something in the direction like what is HERE** could really be helpful. I'm starting up on C++ and documentation on building liblaries is really limited. It could save a lot of time, for anyone else trying to build liblaries for use on Qt.

Thank you all in advance.

Upvotes: 0

Views: 2124

Answers (1)

gsa
gsa

Reputation: 566

If you have sources of TagLib, you can create a solution in MS VS 2015, then add a subproject that contains your Qt project and another subproject (namely DLL library) that contains TagLib. After that you can link your Qt project against TagLib:

  1. Right-click on Qt project, choose Properties.
  2. In the left panel choose Common Properties, References.
  3. Choose Add new reference and add TagLib project.
  4. Then choose C/C++, General, Additional Include Directories.
  5. Add there relative path to TagLig headers that you use in your Qt project.

After that you can include just filenames in your Qt project without relative paths. For example:

#include "SomeHeaderFromTagLib.h"

If you have questions, feel free to ask, I'll update the post.

UPDATE 1 You can use Qt Creator instead of Visual Studio. Community version can be downloaded from Qt website. Documentation how to configure CMake using Qt Creator:

http://doc.qt.io/qtcreator/creator-project-cmake.html

UPDATE 2 Make sure that you're using corresponding Qt version. If you're dealing with MS VS 2015 C++ compiler, then you should use Qt version that is built using this and only this compiler (msvc2015 version).

UPDATE 3 If you're using Qt MSVC 2013 32 bit, then you should use 32 bit TagLib library. You should compile it with following option:

cmake .. -G"Visual Studio 12 2013"

instead of 

cmake .. -G"Visual Studio 14 2015 Win64"

Note that you should have MS VC 2013 compiler on your machine.

After you compile TagLib, open your Qt project in Qt Creator:

  1. Right-click on it.
  2. Choose Add library...
  3. Choose External
  4. Choose file of the library (.lib)

Then right-click on the whole project and choose Run qmake. After that you should be able to build the project.

Upvotes: 1

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