[babababababa]

Today I was reading "The Definitive Guide to db4oa - Apress" then there i go through the given below paragraph. Which I can not able to understand fully.

"One of the key restrictions of GPL software is that you need to distribute your derived applications under the GPL too. If you want to use db4o in a commercial, or non-GPL, application, or you want to get a higher level of technical support from the company, then you can get a
commercial license. Contact db4objects Inc. to learn more."

Here the questions arising in my mind are
1) If I use any API or Package in my code which is released under GPL then is it necessary to make my code as GPL.

2) If I don't want to release my code as GPL and my application is for commercial purpose then,Is I have to pay to the company whose API I am using?

please answer my questions, Its urgent.

[jwenting]

1) yes. Anything that includes or links to a GPL licensed library must itself be under GPL. Whether this applies to libraries you only link to in their binary form is a topic for discussion. As I read the library it does, others claim it doesn't. I would rather be safe than sorry, so don't touch any binary or source released under GPL with a 10 foot pole.
2) you'd not be able to use GPL'd code or libraries, negotiate with the suppliers for a license.

[hanakhan15]

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