﻿Here, glslang proper means core GLSL parsing, HLSL parsing, and SPIR-V code
generation. Glslang proper requires use of a number of licenses, one that covers
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Bison was removed long ago. You can build glslang from the source grammar, using
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Other parts, outside of glslang proper, include:

- gl_types.h, only needed for OpenGL-like reflection, and can be left out of
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- update_glslang_sources.py, which is not part of the project proper and does
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- the SPIR-V "remapper", which is optional, but has the same license as
  glslang proper

- Google tests and SPIR-V tools, and anything in the external subdirectory
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   7. Additional Terms.

      "Additional permissions" are terms that supplement the terms of this
      License by making exceptions from one or more of its conditions.
      Additional permissions that are applicable to the entire Program shall be
      treated as though they were included in this License, to the extent that
      they are valid under applicable law.  If additional permissions apply only
      to part of the Program, that part may be used separately under those
      permissions, but the entire Program remains governed by this License
      without regard to the additional permissions.

      When you convey a copy of a covered work, you may at your option remove
      any additional permissions from that copy, or from any part of it.
      (Additional permissions may be written to require their own removal in
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      permissions on material, added by you to a covered work, for which you
      have or can give appropriate copyright permission.

      Notwithstanding any other provision of this License, for material you add
      to a covered work, you may (if authorized by the copyright holders of that
      material) supplement the terms of this License with terms:

      a) Disclaiming warranty or limiting liability differently from the terms
         of sections 15 and 16 of this License; or

      b) Requiring preservation of specified reasonable legal notices or author
         attributions in that material or in the Appropriate Legal Notices
         displayed by works containing it; or

      c) Prohibiting misrepresentation of the origin of that material, or
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         reasonable ways as different from the original version; or

      d) Limiting the use for publicity purposes of names of licensors or
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      e) Declining to grant rights under trademark law for use of some trade
         names, trademarks, or service marks; or

      f) Requiring indemnification of licensors and authors of that material by
         anyone who conveys the material (or modified versions of it) with
         contractual assumptions of liability to the recipient, for any
         liability that these contractual assumptions directly impose on those
         licensors and authors.

      All other non-permissive additional terms are considered "further
      restrictions" within the meaning of section 10.  If the Program as you
      received it, or any part of it, contains a notice stating that it is
      governed by this License along with a term that is a further restriction,
      you may remove that term.  If a license document contains a further
      restriction but permits relicensing or conveying under this License, you
      may add to a covered work material governed by the terms of that license
      document, provided that the further restriction does not survive such
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      If you add terms to a covered work in accord with this section, you must
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      applicable terms.

      Additional terms, permissive or non-permissive, may be stated in the form
      of a separately written license, or stated as exceptions; the above
      requirements apply either way.

   8. Termination.

      You may not propagate or modify a covered work except as expressly
      provided under this License.  Any attempt otherwise to propagate or modify
      it is void, and will automatically terminate your rights under this
      License (including any patent licenses granted under the third paragraph
      of section 11).

      However, if you cease all violation of this License, then your license
      from a particular copyright holder is reinstated (a) provisionally, unless
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      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, you do not qualify to receive new licenses for the same
      material under section 10.

   9. Acceptance Not Required for Having Copies.

      You are not required to accept this License in order to receive or run a
      copy of the Program.  Ancillary propagation of a covered work occurring
      solely as a consequence of using peer-to-peer transmission to receive a
      copy likewise does not require acceptance.  However, nothing other than
      this License grants you permission to propagate or modify any covered
      work.  These actions infringe copyright if you do not accept this License.
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      acceptance of this License to do so.

   10. Automatic Licensing of Downstream Recipients.

      Each time you convey a covered work, the recipient automatically receives
      a license from the original licensors, to run, modify and propagate that
      work, subject to this License.  You are not responsible for enforcing
      compliance by third parties with this License.

      An "entity transaction" is a transaction transferring control of an
      organization, or substantially all assets of one, or subdividing an
      organization, or merging organizations.  If propagation of a covered work
      results from an entity transaction, each party to that transaction who
      receives a copy of the work also receives whatever licenses to the work
      the party's predecessor in interest had or could give under the previous
      paragraph, plus a right to possession of the Corresponding Source of the
      work from the predecessor in interest, if the predecessor has it or can
      get it with reasonable efforts.

      You may not impose any further restrictions on the exercise of the rights
      granted or affirmed under this License.  For example, you may not impose a
      license fee, royalty, or other charge for exercise of rights granted under
      this License, and you may not initiate litigation (including a cross-claim
      or counterclaim in a lawsuit) alleging that any patent claim is infringed
      by making, using, selling, offering for sale, or importing the Program or
      any portion of it.

   11. Patents.

      A "contributor" is a copyright holder who authorizes use under this
      License of the Program or a work on which the Program is based.  The work
      thus licensed is called the contributor's "contributor version".

      A contributor's "essential patent claims" are all patent claims owned or
      controlled by the contributor, whether already acquired or hereafter
      acquired, that would be infringed by some manner, permitted by this
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      include claims that would be infringed only as a consequence of further
      modification of the contributor version.  For purposes of this definition,
      "control" includes the right to grant patent sublicenses in a manner
      consistent with the requirements of this License.

      Each contributor grants you a non-exclusive, worldwide, royalty-free
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      In the following three paragraphs, a "patent license" is any express
      agreement or commitment, however denominated, not to enforce a patent
      (such as an express permission to practice a patent or covenant not to sue
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      against the party.

      If you convey a covered work, knowingly relying on a patent license, and
      the Corresponding Source of the work is not available for anyone to copy,
      free of charge and under the terms of this License, through a publicly
      available network server or other readily accessible means, then you must
      either (1) cause the Corresponding Source to be so available, or (2)
      arrange to deprive yourself of the benefit of the patent license for this
      particular work, or (3) arrange, in a manner consistent with the
      requirements of this License, to extend the patent license to downstream
      recipients.  "Knowingly relying" means you have actual knowledge that, but
      for the patent license, your conveying the covered work in a country, or
      your recipient's use of the covered work in a country, would infringe one
      or more identifiable patents in that country that you have reason to
      believe are valid.

      If, pursuant to or in connection with a single transaction or arrangement,
      you convey, or propagate by procuring conveyance of, a covered work, and
      grant a patent license to some of the parties receiving the covered work
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      A patent license is "discriminatory" if it does not include within the
      scope of its coverage, prohibits the exercise of, or is conditioned on the
      non-exercise of one or more of the rights that are specifically granted
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      to an arrangement with a third party that is in the business of
      distributing software, under which you make payment to the third party
      based on the extent of your activity of conveying the work, and under
      which the third party grants, to any of the parties who would receive the
      covered work from you, a discriminatory patent license (a) in connection
      with copies of the covered work conveyed by you (or copies made from those
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      compilations that contain the covered work, unless you entered into that
      arrangement, or that patent license was granted, prior to 28 March 2007.

      Nothing in this License shall be construed as excluding or limiting any
      implied license or other defenses to infringement that may otherwise be
      available to you under applicable patent law.

   12. No Surrender of Others' Freedom.

      If conditions are imposed on you (whether by court order, agreement or
      otherwise) that contradict the conditions of this License, they do not
      excuse you from the conditions of this License.  If you cannot convey a
      covered work so as to satisfy simultaneously your obligations under this
      License and any other pertinent obligations, then as a consequence you may
      not convey it at all.  For example, if you agree to terms that obligate
      you to collect a royalty for further conveying from those to whom you
      convey the Program, the only way you could satisfy both those terms and
      this License would be to refrain entirely from conveying the Program.

   13. Use with the GNU Affero General Public License.

      Notwithstanding any other provision of this License, you have permission
      to link or combine any covered work with a work licensed under version 3
      of the GNU Affero General Public License into a single combined work, and
      to convey the resulting work.  The terms of this License will continue to
      apply to the part which is the covered work, but the special requirements
      of the GNU Affero General Public License, section 13, concerning
      interaction through a network will apply to the combination as such.

   14. Revised Versions of this License.

      The Free Software Foundation may publish revised and/or new versions of
      the GNU General Public 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.

      Each version is given a distinguishing version number.  If the Program
      specifies that a certain numbered version of the GNU General Public
      License "or any later version" applies to it, you have the option of
      following the terms and conditions either of that numbered version or of
      any later version published by the Free Software Foundation.  If the
      Program does not specify a version number of the GNU General Public
      License, you may choose any version ever published by the Free Software
      Foundation.

      If the Program specifies that a proxy can decide which future versions of
      the GNU General Public License can be used, that proxy's public statement
      of acceptance of a version permanently authorizes you to choose that
      version for the Program.

      Later license versions may give you additional or different permissions.
      However, no additional obligations are imposed on any author or copyright
      holder as a result of your choosing to follow a later version.

   15. Disclaimer of Warranty.

      THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
      APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
      HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
      OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
      THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
      IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
      ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

   16. Limitation of Liability.

      IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
      ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
      PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
      GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
      USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
      DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
      PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
      EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
      SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

      If the disclaimer of warranty and limitation of liability provided above
      cannot be given local legal effect according to their terms, reviewing
      courts shall apply local law that most closely approximates an absolute
      waiver of all civil liability in connection with the Program, unless a
      warranty or assumption of liability accompanies a copy of the Program in
      return for a fee.

   Bison Exception

   As a special exception, you may create a larger work that contains part or
   all of the Bison parser skeleton and distribute that work under terms of your
   choice, so long as that work isn't itself a parser generator using the
   skeleton or a modified version thereof as a parser skeleton.  Alternatively,
   if you modify or redistribute the parser skeleton itself, you may (at your
   option) remove this special exception, which will cause the skeleton and the
   resulting Bison output files to be licensed under the GNU General Public
   License without this special exception.

   This special exception was added by the Free Software Foundation in version
   2.2 of Bison.

   END OF TERMS AND CONDITIONS

--------------------------------------------------------------------------------
================================================================================
--------------------------------------------------------------------------------

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   Copyright (c) 2002, NVIDIA Corporation.

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   In consideration of your agreement to abide by the following terms, and
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