GFDL(7)                                GNU                               GFDL(7)

       gfdl - GNU Free Documentation License

       @comment For some cases, this default @node/@unnumbered is not applicable
       and @comment causes warnings.  In those cases, the including file can set
       @comment nodefaultgnufreedocumentationlicensenode and provide it's own
       version.  @comment F.i., when this file is included in an @raisesections
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   GNU Free Documentation License
   Version 1.3, 3 November 2008
               Copyright (c) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.

               Everyone is permitted to copy and distribute verbatim copies
               of this license document, but changing it is not allowed.

       0.  PREAMBLE

           The purpose of this License is to make a manual, textbook, or other
           functional and useful document free in the sense of freedom: to
           assure everyone the effective freedom to copy and redistribute it,
           with or without modifying it, either commercially or noncommercially.
           Secondarily, this License preserves for the author and publisher a
           way to get credit for their work, while not being considered
           responsible for modifications made by others.

           This License is a kind of "copyleft", which means that derivative
           works of the document must themselves be free in the same sense.  It
           complements the GNU General Public License, which is a copyleft
           license designed for free software.

           We have designed this License in order to use it for manuals for free
           software, because free software needs free documentation: a free
           program should come with manuals providing the same freedoms that the
           software does.  But this License is not limited to software manuals;
           it can be used for any textual work, regardless of subject matter or
           whether it is published as a printed book.  We recommend this License
           principally for works whose purpose is instruction or reference.


           This License applies to any manual or other work, in any medium, that
           contains a notice placed by the copyright holder saying it can be
           distributed under the terms of this License.  Such a notice grants a
           world-wide, royalty-free license, unlimited in duration, to use that
           work under the conditions stated herein.  The "Document", below,
           refers to any such manual or work.  Any member of the public is a
           licensee, and is addressed as "you".  You accept the license if you
           copy, modify or distribute the work in a way requiring permission
           under copyright law.

           A "Modified Version" of the Document means any work containing the
           Document or a portion of it, either copied verbatim, or with
           modifications and/or translated into another language.

           A "Secondary Section" is a named appendix or a front-matter section
           of the Document that deals exclusively with the relationship of the
           publishers or authors of the Document to the Document's overall
           subject (or to related matters) and contains nothing that could fall
           directly within that overall subject.  (Thus, if the Document is in
           part a textbook of mathematics, a Secondary Section may not explain
           any mathematics.)  The relationship could be a matter of historical
           connection with the subject or with related matters, or of legal,
           commercial, philosophical, ethical or political position regarding

           The "Invariant Sections" are certain Secondary Sections whose titles
           are designated, as being those of Invariant Sections, in the notice
           that says that the Document is released under this License.  If a
           section does not fit the above definition of Secondary then it is not
           allowed to be designated as Invariant.  The Document may contain zero
           Invariant Sections.  If the Document does not identify any Invariant
           Sections then there are none.

           The "Cover Texts" are certain short passages of text that are listed,
           as Front-Cover Texts or Back-Cover Texts, in the notice that says
           that the Document is released under this License.  A Front-Cover Text
           may be at most 5 words, and a Back-Cover Text may be at most 25

           A "Transparent" copy of the Document means a machine-readable copy,
           represented in a format whose specification is available to the
           general public, that is suitable for revising the document
           straightforwardly with generic text editors or (for images composed
           of pixels) generic paint programs or (for drawings) some widely
           available drawing editor, and that is suitable for input to text
           formatters or for automatic translation to a variety of formats
           suitable for input to text formatters.  A copy made in an otherwise
           Transparent file format whose markup, or absence of markup, has been
           arranged to thwart or discourage subsequent modification by readers
           is not Transparent.  An image format is not Transparent if used for
           any substantial amount of text.  A copy that is not "Transparent" is
           called "Opaque".

           Examples of suitable formats for Transparent copies include plain
           ASCII without markup, Texinfo input format, LaTeX input format, SGML
           or XML using a publicly available DTD, and standard-conforming simple
           HTML, PostScript or PDF designed for human modification.  Examples of
           transparent image formats include PNG, XCF and JPG.  Opaque formats
           include proprietary formats that can be read and edited only by
           proprietary word processors, SGML or XML for which the DTD and/or
           processing tools are not generally available, and the machine-
           generated HTML, PostScript or PDF produced by some word processors
           for output purposes only.

           The "Title Page" means, for a printed book, the title page itself,
           plus such following pages as are needed to hold, legibly, the
           material this License requires to appear in the title page.  For
           works in formats which do not have any title page as such, "Title
           Page" means the text near the most prominent appearance of the work's
           title, preceding the beginning of the body of the text.

           The "publisher" means any person or entity that distributes copies of
           the Document to the public.

           A section "Entitled XYZ" means a named subunit of the Document whose
           title either is precisely XYZ or contains XYZ in parentheses
           following text that translates XYZ in another language.  (Here XYZ
           stands for a specific section name mentioned below, such as
           "Acknowledgements", "Dedications", "Endorsements", or "History".)  To
           "Preserve the Title" of such a section when you modify the Document
           means that it remains a section "Entitled XYZ" according to this

           The Document may include Warranty Disclaimers next to the notice
           which states that this License applies to the Document.  These
           Warranty Disclaimers are considered to be included by reference in
           this License, but only as regards disclaiming warranties: any other
           implication that these Warranty Disclaimers may have is void and has
           no effect on the meaning of this License.


           You may copy and distribute the Document in any medium, either
           commercially or noncommercially, provided that this License, the
           copyright notices, and the license notice saying this License applies
           to the Document are reproduced in all copies, and that you add no
           other conditions whatsoever to those of this License.  You may not
           use technical measures to obstruct or control the reading or further
           copying of the copies you make or distribute.  However, you may
           accept compensation in exchange for copies.  If you distribute a
           large enough number of copies you must also follow the conditions in
           section 3.

           You may also lend copies, under the same conditions stated above, and
           you may publicly display copies.


           If you publish printed copies (or copies in media that commonly have
           printed covers) of the Document, numbering more than 100, and the
           Document's license notice requires Cover Texts, you must enclose the
           copies in covers that carry, clearly and legibly, all these Cover
           Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
           the back cover.  Both covers must also clearly and legibly identify
           you as the publisher of these copies.  The front cover must present
           the full title with all words of the title equally prominent and
           visible.  You may add other material on the covers in addition.
           Copying with changes limited to the covers, as long as they preserve
           the title of the Document and satisfy these conditions, can be
           treated as verbatim copying in other respects.

           If the required texts for either cover are too voluminous to fit
           legibly, you should put the first ones listed (as many as fit
           reasonably) on the actual cover, and continue the rest onto adjacent

           If you publish or distribute Opaque copies of the Document numbering
           more than 100, you must either include a machine-readable Transparent
           copy along with each Opaque copy, or state in or with each Opaque
           copy a computer-network location from which the general network-using
           public has access to download using public-standard network protocols
           a complete Transparent copy of the Document, free of added material.
           If you use the latter option, you must take reasonably prudent steps,
           when you begin distribution of Opaque copies in quantity, to ensure
           that this Transparent copy will remain thus accessible at the stated
           location until at least one year after the last time you distribute
           an Opaque copy (directly or through your agents or retailers) of that
           edition to the public.

           It is requested, but not required, that you contact the authors of
           the Document well before redistributing any large number of copies,
           to give them a chance to provide you with an updated version of the


           You may copy and distribute a Modified Version of the Document under
           the conditions of sections 2 and 3 above, provided that you release
           the Modified Version under precisely this License, with the Modified
           Version filling the role of the Document, thus licensing distribution
           and modification of the Modified Version to whoever possesses a copy
           of it.  In addition, you must do these things in the Modified

           A.  Use in the Title Page (and on the covers, if any) a title
               distinct from that of the Document, and from those of previous
               versions (which should, if there were any, be listed in the
               History section of the Document).  You may use the same title as
               a previous version if the original publisher of that version
               gives permission.

           B.  List on the Title Page, as authors, one or more persons or
               entities responsible for authorship of the modifications in the
               Modified Version, together with at least five of the principal
               authors of the Document (all of its principal authors, if it has
               fewer than five), unless they release you from this requirement.

           C.  State on the Title page the name of the publisher of the Modified
               Version, as the publisher.

           D.  Preserve all the copyright notices of the Document.

           E.  Add an appropriate copyright notice for your modifications
               adjacent to the other copyright notices.

           F.  Include, immediately after the copyright notices, a license
               notice giving the public permission to use the Modified Version
               under the terms of this License, in the form shown in the
               Addendum below.

           G.  Preserve in that license notice the full lists of Invariant
               Sections and required Cover Texts given in the Document's license

           H.  Include an unaltered copy of this License.

           I.  Preserve the section Entitled "History", Preserve its Title, and
               add to it an item stating at least the title, year, new authors,
               and publisher of the Modified Version as given on the Title Page.
               If there is no section Entitled "History" in the Document, create
               one stating the title, year, authors, and publisher of the
               Document as given on its Title Page, then add an item describing
               the Modified Version as stated in the previous sentence.

           J.  Preserve the network location, if any, given in the Document for
               public access to a Transparent copy of the Document, and likewise
               the network locations given in the Document for previous versions
               it was based on.  These may be placed in the "History" section.
               You may omit a network location for a work that was published at
               least four years before the Document itself, or if the original
               publisher of the version it refers to gives permission.

           K.  For any section Entitled "Acknowledgements" or "Dedications",
               Preserve the Title of the section, and preserve in the section
               all the substance and tone of each of the contributor
               acknowledgements and/or dedications given therein.

           L.  Preserve all the Invariant Sections of the Document, unaltered in
               their text and in their titles.  Section numbers or the
               equivalent are not considered part of the section titles.

           M.  Delete any section Entitled "Endorsements".  Such a section may
               not be included in the Modified Version.

           N.  Do not retitle any existing section to be Entitled "Endorsements"
               or to conflict in title with any Invariant Section.

           O.  Preserve any Warranty Disclaimers.

           If the Modified Version includes new front-matter sections or
           appendices that qualify as Secondary Sections and contain no material
           copied from the Document, you may at your option designate some or
           all of these sections as invariant.  To do this, add their titles to
           the list of Invariant Sections in the Modified Version's license
           notice.  These titles must be distinct from any other section titles.

           You may add a section Entitled "Endorsements", provided it contains
           nothing but endorsements of your Modified Version by various
           parties---for example, statements of peer review or that the text has
           been approved by an organization as the authoritative definition of a

           You may add a passage of up to five words as a Front-Cover Text, and
           a passage of up to 25 words as a Back-Cover Text, to the end of the
           list of Cover Texts in the Modified Version.  Only one passage of
           Front-Cover Text and one of Back-Cover Text may be added by (or
           through arrangements made by) any one entity.  If the Document
           already includes a cover text for the same cover, previously added by
           you or by arrangement made by the same entity you are acting on
           behalf of, you may not add another; but you may replace the old one,
           on explicit permission from the previous publisher that added the old

           The author(s) and publisher(s) of the Document do not by this License
           give permission to use their names for publicity for or to assert or
           imply endorsement of any Modified Version.


           You may combine the Document with other documents released under this
           License, under the terms defined in section 4 above for modified
           versions, provided that you include in the combination all of the
           Invariant Sections of all of the original documents, unmodified, and
           list them all as Invariant Sections of your combined work in its
           license notice, and that you preserve all their Warranty Disclaimers.

           The combined work need only contain one copy of this License, and
           multiple identical Invariant Sections may be replaced with a single
           copy.  If there are multiple Invariant Sections with the same name
           but different contents, make the title of each such section unique by
           adding at the end of it, in parentheses, the name of the original
           author or publisher of that section if known, or else a unique
           number.  Make the same adjustment to the section titles in the list
           of Invariant Sections in the license notice of the combined work.

           In the combination, you must combine any sections Entitled "History"
           in the various original documents, forming one section Entitled
           "History"; likewise combine any sections Entitled "Acknowledgements",
           and any sections Entitled "Dedications".  You must delete all
           sections Entitled "Endorsements."


           You may make a collection consisting of the Document and other
           documents released under this License, and replace the individual
           copies of this License in the various documents with a single copy
           that is included in the collection, provided that you follow the
           rules of this License for verbatim copying of each of the documents
           in all other respects.

           You may extract a single document from such a collection, and
           distribute it individually under this License, provided you insert a
           copy of this License into the extracted document, and follow this
           License in all other respects regarding verbatim copying of that


           A compilation of the Document or its derivatives with other separate
           and independent documents or works, in or on a volume of a storage or
           distribution medium, is called an "aggregate" if the copyright
           resulting from the compilation is not used to limit the legal rights
           of the compilation's users beyond what the individual works permit.
           When the Document is included in an aggregate, this License does not
           apply to the other works in the aggregate which are not themselves
           derivative works of the Document.

           If the Cover Text requirement of section 3 is applicable to these
           copies of the Document, then if the Document is less than one half of
           the entire aggregate, the Document's Cover Texts may be placed on
           covers that bracket the Document within the aggregate, or the
           electronic equivalent of covers if the Document is in electronic
           form.  Otherwise they must appear on printed covers that bracket the
           whole aggregate.

       8.  TRANSLATION

           Translation is considered a kind of modification, so you may
           distribute translations of the Document under the terms of section 4.
           Replacing Invariant Sections with translations requires special
           permission from their copyright holders, but you may include
           translations of some or all Invariant Sections in addition to the
           original versions of these Invariant Sections.  You may include a
           translation of this License, and all the license notices in the
           Document, and any Warranty Disclaimers, provided that you also
           include the original English version of this License and the original
           versions of those notices and disclaimers.  In case of a disagreement
           between the translation and the original version of this License or a
           notice or disclaimer, the original version will prevail.

           If a section in the Document is Entitled "Acknowledgements",
           "Dedications", or "History", the requirement (section 4) to Preserve
           its Title (section 1) will typically require changing the actual

       9.  TERMINATION

           You may not copy, modify, sublicense, or distribute the Document
           except as expressly provided under this License.  Any attempt
           otherwise to copy, modify, sublicense, or distribute it is void, and
           will automatically terminate your rights under this License.

           However, if you cease all violation of this License, then your
           license from a particular copyright holder is reinstated (a)
           provisionally, unless and until the copyright holder explicitly and
           finally terminates your license, and (b) permanently, if the
           copyright holder fails to notify you of the violation by some
           reasonable means prior to 60 days after the cessation.

           Moreover, your license from a particular copyright holder is
           reinstated permanently if the copyright holder notifies you of the
           violation by some reasonable means, this is the first time you have
           received notice of violation of this License (for any work) from that
           copyright holder, and you cure the violation prior to 30 days after
           your receipt of the notice.

           Termination of your rights under this section does not terminate the
           licenses of parties who have received copies or rights from you under
           this License.  If your rights have been terminated and not
           permanently reinstated, receipt of a copy of some or all of the same
           material does not give you any rights to use it.


           The Free Software Foundation may publish new, revised versions of the
           GNU Free Documentation License from time to time.  Such new versions
           will be similar in spirit to the present version, but may differ in
           detail to address new problems or concerns.  See

           Each version of the License is given a distinguishing version number.
           If the Document specifies that a particular numbered version of this
           License "or any later version" applies to it, you have the option of
           following the terms and conditions either of that specified version
           or of any later version that has been published (not as a draft) by
           the Free Software Foundation.  If the Document does not specify a
           version number of this License, you may choose any version ever
           published (not as a draft) by the Free Software Foundation.  If the
           Document specifies that a proxy can decide which future versions of
           this License can be used, that proxy's public statement of acceptance
           of a version permanently authorizes you to choose that version for
           the Document.

       11. RELICENSING

           "Massive Multiauthor Collaboration Site" (or "MMC Site") means any
           World Wide Web server that publishes copyrightable works and also
           provides prominent facilities for anybody to edit those works.  A
           public wiki that anybody can edit is an example of such a server.  A
           "Massive Multiauthor Collaboration" (or "MMC") contained in the site
           means any set of copyrightable works thus published on the MMC site.

           "CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
           license published by Creative Commons Corporation, a not-for-profit
           corporation with a principal place of business in San Francisco,
           California, as well as future copyleft versions of that license
           published by that same organization.

           "Incorporate" means to publish or republish a Document, in whole or
           in part, as part of another Document.

           An MMC is "eligible for relicensing" if it is licensed under this
           License, and if all works that were first published under this
           License somewhere other than this MMC, and subsequently incorporated
           in whole or in part into the MMC, (1) had no cover texts or invariant
           sections, and (2) were thus incorporated prior to November 1, 2008.

           The operator of an MMC Site may republish an MMC contained in the
           site under CC-BY-SA on the same site at any time before August 1,
           2009, provided the MMC is eligible for relicensing.

   ADDENDUM: How to use this License for your documents
       To use this License in a document you have written, include a copy of the
       License in the document and put the following copyright and license
       notices just after the title page:

                 Copyright (C)  <year>  <your name>.
                 Permission is granted to copy, distribute and/or modify this document
                 under the terms of the GNU Free Documentation License, Version 1.3
                 or any later version published by the Free Software Foundation;
                 with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
                 Texts.  A copy of the license is included in the section entitled "GNU
                 Free Documentation License".

       If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
       replace the "with...Texts." line with this:

                   with the Invariant Sections being <list their titles>, with
                   the Front-Cover Texts being <list>, and with the Back-Cover Texts
                   being <list>.

       If you have Invariant Sections without Cover Texts, or some other
       combination of the three, merge those two alternatives to suit the

       If your document contains nontrivial examples of program code, we
       recommend releasing these examples in parallel under your choice of free
       software license, such as the GNU General Public License, to permit their
       use in free software.

       gpl(7), fsf-funding(7).

       Copyright (c) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.

       Everyone is permitted to copy and distribute verbatim copies of this
       license document, but changing it is not allowed.

gcc-10.2.0                         2020-07-23                            GFDL(7)