Linking dynamic with commercial 3rd party library

[Cris67]

I develop an application with QT under LGPL licence, but I need to dynamic link with a 3rd party commercial library. Is that legal? I distribute my application free under LGPL license but the customer will have to buy the commercial library to have all the feature working properly. Is there any legal issue?

[A Former User]

Hi! Disclaimer: I am not a lawyer. If you link your application against LGPL libraries (Qt) then you must provide your customer everything that's needed to relink the application against modified versions of those libraries. As you said your application is published under LGPL, you're publishing all your sources anyways, so IMAO there's no problem.