License
FreeBSD is released under a variety of open source licenses. The kernel code and most newly created code is released under the two-clause BSD license which allows everyone to use and redistribute FreeBSD as they wish. There are parts released under three- and four-clause BSD licenses, as well as Beerware license. Some device drivers include a binary blob, such as the Atheros HAL of FreeBSD versions before 7.2. Some of the code contributed by other projects is licensed under GPL, LGPL, ISC or CDDL. All the code licensed under GPL and CDDL is clearly separated from the code under liberal licenses, to make it easy for users such as embedded device manufacturers to use only permissive free software licenses. ClangBSD aims to replace some GPL dependencies in the FreeBSD base system by replacing the GNU compiler collection with the BSD-licenced LLVM/Clang compiler. ClangBSD became self-hosting on 16 April 2010, an important landmark for further independent development.
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As men wed ladies by license and leave,
All is possible.”
—Sir Thomas Wyatt (1503?–1542)
“It is a misfortune that necessity has induced men to accord greater license to this formidable engine, in order to obtain liberty, than can be borne with less important objects in view; for the press, like fire, is an excellent servant, but a terrible master.”
—James Fenimore Cooper (1789–1851)
“I go out of my way, but rather by license than carelessness.... It is the inattentive reader
who loses my subject, not I. Some word about it will always be found off in a corner, which will not fail to be sufficient, though it takes little room.”
—Michel de Montaigne (1533–1592)