GNU license case Study #1

I used linux (c++, libraries) etc. to creaet an application. The GNU libraries are compiled into the application.

Now I want to sell the application. Do I need a license?
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rfr1tzAsked:
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willy134Commented:
Sure you can sell it, but if your application falls under the GPL (you used code that is protected by the GPL) or any other license, you may have to also give away the code you created.

For example RED HAT

red hat creates linux code, red hat sells linux code.  However most of that code you can obtain for free from redhat, they are mostly selling support.
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paullamhkgCommented:
I agree with willy134, have a look on here http://www.gnu.org/copyleft/gpl.html abt the GNU GPL (General Public License) here you can find the TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION  
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GnsCommented:
> The GNU libraries are compiled into the application.
Really? Or are you just depending on the library _functions_ to be there?
There is a difference.
And you might be lucky enough to fall under the LGPL instead (Library GPL, or "Lesser" GPL), or some other "more lenient" license so that you can  distribute the efforts of your work under a commercial license.
This type of issues has been a bone ever since RMS dreamed up the copyleft:-).

-- Glenn
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pjedmondCommented:
In most cases like this, you are selling it, but the charge is for the media, and convenience of the distribution itself.

If it comes under the GPL, then you have to make the code available for free.
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