http://www.linux.com/feature/119212

CC licenses and the GPL

Luckily, when determining which CC licenses permit a work to be combined with GPL software, there are far fewer choices.

The Non-commercial and No Derivatives elements both conflict with the FSF's free software definition, so no license that includes either of these is compatible with the GPL.

The Non-commercial element restricts the licensee's right to use the licensed work in a commercial setting; this conflicts with the free software definition's "freedom zero" -- the freedom to run the program, for any purpose. The No Derivatives element restricts the licensee's right to change the licensed work, which conflicts with both freedom one (the freedom to "adapt it to your needs") and freedom three (the freedom to "improve the program and release your improvements to the public").

ako dosiahnut aby GPL softver pouzity v nejakom celku, tak ten celok nebol povoleny na komercne pouzitie ? softver neznamena len zdrojovy kod ale ked sa pospaja viac programov vznikne aj nieco ine ako len subor programov.