Is it legal to modify QT 4.8.7 and build wkhtmltopdf using this modified QT 4.8.7

[Babitha]

I am creating a library by building source of wkhtmltopdf with patched QT 4.8.7 , which is having a LGPL license. Is it legal to modify the contents of QT 4.8.7 and build wkhtmltopdf using this modified QT 4.8.7 ? My library will be integrated to a commercial application.

[jsulm]

@Babitha It is legal as long as you do not violate the license. In case of LGPL you have to also open source your changes on Qt if you distribute your software.
Please keep in mind: I'm not a lawyer!

[Babitha]

How do i know which version of QT is used by wkhtmltopdf 0.12.5?
Where the informaton is kept in wkhtmltopdf 0.12.5 source?

[Christian Ehrlicher]

@Babitha said in Is it legal to modify QT 4.8.7 and build wkhtmltopdf using this modified QT 4.8.7:

Where the informaton is kept in wkhtmltopdf 0.12.5 source?

In the git repository: https://github.com/wkhtmltopdf/wkhtmltopdf - as you can see they have an own copy of Qt4.

[Babitha]

Is there an information like QT version correspond to wkhtmltopdf 0.12.5 source.
In which file i can see this information?

[Christian Ehrlicher]

@Babitha They link to their Qt repository - so use it if you want the Qt version used for wkhtmltopdf - as you can see it's a Qt4 repo with some patches from them.