[Development] Qt open source license in product

Attila Csipa qt at csipa.in.rs
Wed Mar 5 10:31:41 CET 2014


Disclaimer: IANAL

No, the LGPL does not require the release of *sources* of your 
application. However, there are extra requirements to the *binaries* 
(especially related to being able to replace the Qt libraries you're 
providing). In general, if you're using Qt libs from a user accessible 
directory/source, you're likely ok. This is especially tricky on mobile 
- in my (IANAL) reading, Ministro is OK, but bundling the Qt libs within 
apps is a grey area at best unless you take extra precautions regarding 
the disclaimers/instructions.

Best regards,
Attila Csipa

On 05/03/14 11:13, Ramakanthreddy Kesireddy wrote:
> I have read something like below:
> Applications using Qt that use the open-source licenses need to follow 
> the same license, so their source would need to be made available.
> We are using Qt Open source license under LGPL v2.1 + execption.
> Do we need to make our application source code available in this regard?
> Best Regards,
> Ramakanth
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