[Qt-interest] Including libltdl.3.dylib on OSX into deployable package

[Samuel Gaist]

On 4 janv. 2012, at 11:01, Dirk Neumann wrote:

> Hello!
> 
> I am writing an Qt-application for MacOSX, and I use macdeployqt to
> generate a deployable app-bundle. Now I have the problem that some
> external libraries I use (mpg123) point to /usr/lib/libltdl.3.dylib in
> app-bundle. On OSX 10.5 and 10.6 this works fine, but on 10.7 there is
> no /usr/lib/libltdl.3.dylib but /usr/lib/libltld.7.dylib. So I tried to
> incorporate the libltdl.3 from my devel-computer (OSX 10.5, Qt 4.5.3)
> with LIBS+= -L/usr/lib\
>       -lltdl
> in the .pro-file, regenerated all (make distclean, qmake, make) and
> reran macdeployqt. But there is still no libltdl.3.dylib in
> Frameworks-directory. 
> Copying libldtdl.3.dylib manually to the Frameworks-directory before
> running macdeployqt also has no positive effect: libs pointing still
> to /usr/lib/libltdl.3.dylib instead of Frameworks/libltdl.3.dylib.
> 
> I think I go into the wrong direction here, and I hope some one has
> time to look at my compass.
> 
> Greetings,
> 
> Dirk.
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> Qt-interest at qt.nokia.com
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Hello,

It happens that some libraries are not copied, so you have to do it manually (as you already do) then you must update the paths of your executable and/or local lib with install_name_tool

i.e: install_name_tool -change /usr/lib/libltdl.3.dylib @executable_path/../Frameworks/libltdl.3.dylib YourCoolApplication.app/Contents/MacOS/YourCoolApplication 

Do this on all necessary files BUT only for those that you provide in your bundle (i.e. no system libraries)

You might also be interested in using otool -L to have more information about your application/libraries.

Hope this helps
Samuel