As a special exception, you have permission to link this program with the FOO library and distribute executables, as long as you follow the requirements of the GNU GPL in regard to all of the software in the executable aside from FOO.You can do this, legally, if you are the copyright holder for the program. Add it in the source files, after the notice that says the program is covered by the GNU GPL. RealNetworks Public Source License (RPSL), Version 1.0 (#RPSL) The RPSL is a free software license that is GPL-incompatible for a number of reasons: it requires that derivative works be licensed under the terms of the RPSL, and mandates that any litigation take place in Seattle, Washington. Sun Industry Standards Source License 1.1 (#SISSL) This is a free software license, not a strong copyleft, which is incompatible with the GNU GPL because of details rather than any major policy. Sun Public License (#SPL) This is essentially the same as the Mozilla Public License version 1: a free software license incompatible with the GNU GPL. Please do not confuse this with the Sun Community Source License, which is not a free software license. License of xinetd (#xinetd) This is a copyleft free software license, incompatible with the GPL. It is incompatible because it places extra restrictions on redistribution of modified versions that contradict the redistribution requirements in the GPL. Yahoo! Public License 1.1 (#Yahoo) This is a free software license. It has a copyleft similar to the one found in the Mozilla Public License. It also has a choice of law clause in section 7. These features both make the license GPL-incompatible. The license also unfortunately uses the term “intellectual property”. Zend License, Version 2.0 (#Zend) This license is used by one part of PHP4. It is a non-copyleft free software license which is incompatible with the GNU GPL, and has practical problems like those of the original BSD license. We recommend that you not use this license for anything you write. Zimbra Public License 1.3 (#Zimbra) This license is identical to the Yahoo! Public License 1.1, except that the license is provided by VMWare instead of Yahoo!. Our comments there apply here as well; this is a GPL-incompatible, partial copyleft free software license. Zope Public License version 1 (#Zope) This is a lax, fairly permissive non-copyleft free software license with practical problems like those of the original BSD license, including incompatibility with the GNU GPL. We urge you not to use the ZPL version 1 for software you write. However, there is no reason to avoid running programs that have been released under this license, such as previous versions of Zope. Version 2.0 of the Zope Public License is GPL-compatible.