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    1 Overview
    2 ========
    3 
    4 LDC is released under the "three-clause BSD" LDC license reproduced below, with
    5 the following exceptions:
    6 
    7 Compiler (bin/ in binary packages):
    8  - LDC uses the DMD frontend (ddmd/* in source code distributions),
    9    which was originally written by Walter Bright and is released under the
   10    Boost Software License - Version 1.0. LDMD (driver/ldmd.cpp) and the RTTI
   11    handling code (gen/typinf.cpp) are also partly derived from DMD.
   12 
   13  - LDC incorporates code (gen/asmstmt.cpp and gen/asm-*.h) originally written
   14    by David Friedman for GDC and released under the Artistic license or the
   15    GPL version 2 or later.
   16 
   17  - The LDC project makes use of the LLVM framework, which is governed by the
   18    University of Illinois Open Source License. A few LDC source files directly
   19    incorporate code derived from LLVM, see the file headers for details.
   20 
   21 Libraries (lib/ and import/ in binary packages):
   22  - The D standard library, comprised of druntime (runtime/druntime) and
   23    Phobos (runtime/phobos), is distributed under the terms of the Boost
   24    Software License. See the individual source files for author information.
   25 
   26  - The ldc-jit-rt library is distributed under the terms of the 
   27    Boost Software license (but additionally makes use of LLVM code).
   28 
   29  - The profile-rt runtime library (runtime/profile-rt) is a copy of LLVM's
   30    compiler-rt/profile library with a small D source addition. It is dual
   31    licensed under the University of Illinois Open Source License and under the
   32    MIT License, which does not contain the binary redistribution clause. The
   33    absense of the binary redistribution clause means that programs into which
   34    profile-rt has been linked are not subject to the binary redistribution
   35    clause.
   36    (currently, profile-rt is only linked implicitly with and only used
   37    implicitly by programs built with instrumentation through
   38    `-fprofile-instr-generate`).
   39 
   40 
   41 Full license texts
   42 ==================
   43 
   44 -- LDC license -----------------------------------------------------------------
   45 
   46 Copyright (c) 2007-2017 LDC Team.
   47 All rights reserved.
   48 
   49 Redistribution and use in source and binary forms, with or without
   50 modification, are permitted provided that the following conditions are met:
   51 
   52     * Redistributions of source code must retain the above copyright notice,
   53       this list of conditions and the following disclaimer.
   54     * Redistributions in binary form must reproduce the above copyright notice,
   55       this list of conditions and the following disclaimer in the documentation
   56       and/or other materials provided with the distribution.
   57     * Neither the name of the LDC Team nor the names of its contributors may be
   58       used to endorse or promote products derived from this software without
   59       specific prior written permission.
   60 
   61 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   62 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   63 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   64 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   65 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   66 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   67 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   68 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   69 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   70 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   71 
   72 
   73 -- DMD license -----------------------------------------------------------------
   74 
   75 Copyright (c) 1999-2017 by Digital Mars written by Walter Bright.
   76 
   77 DMD is released under the terms of the Boost Software License - Version 1.0.
   78 
   79 
   80 -- Runtime library license (druntime and Phobos) ------------------------------
   81 
   82 Boost Software License - Version 1.0 - August 17th, 2003
   83 
   84 Permission is hereby granted, free of charge, to any person or organization
   85 obtaining a copy of the software and accompanying documentation covered by
   86 this license (the "Software") to use, reproduce, display, distribute,
   87 execute, and transmit the Software, and to prepare derivative works of the
   88 Software, and to permit third-parties to whom the Software is furnished to
   89 do so, all subject to the following:
   90 
   91 The copyright notices in the Software and this entire statement, including
   92 the above license grant, this restriction and the following disclaimer,
   93 must be included in all copies of the Software, in whole or in part, and
   94 all derivative works of the Software, unless such copies or derivative
   95 works are solely in the form of machine-executable object code generated by
   96 a source language processor.
   97 
   98 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   99 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  100 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  101 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  102 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  103 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  104 DEALINGS IN THE SOFTWARE.
  105 
  106 
  107 -- LLVM license ----------------------------------------------------------------
  108 
  109 University of Illinois/NCSA
  110 Open Source License
  111 
  112 Copyright (c) 2003-2017 University of Illinois at Urbana-Champaign.
  113 All rights reserved.
  114 
  115 Developed by:
  116 
  117     LLVM Team
  118 
  119     University of Illinois at Urbana-Champaign
  120 
  121     http://llvm.org
  122 
  123 Permission is hereby granted, free of charge, to any person obtaining a copy of
  124 this software and associated documentation files (the "Software"), to deal with
  125 the Software without restriction, including without limitation the rights to
  126 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  127 of the Software, and to permit persons to whom the Software is furnished to do
  128 so, subject to the following conditions:
  129 
  130     * Redistributions of source code must retain the above copyright notice,
  131       this list of conditions and the following disclaimers.
  132 
  133     * Redistributions in binary form must reproduce the above copyright notice,
  134       this list of conditions and the following disclaimers in the
  135       documentation and/or other materials provided with the distribution.
  136 
  137     * Neither the names of the LLVM Team, University of Illinois at
  138       Urbana-Champaign, nor the names of its contributors may be used to
  139       endorse or promote products derived from this Software without specific
  140       prior written permission.
  141 
  142 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  143 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  144 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  145 CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  146 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  147 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
  148 SOFTWARE.
  149 
  150 
  151 -- MIT license - (profile-rt) -------------------------------------------------
  152 
  153 Copyright (c) 2009-2016 by the compiler-rt contributors
  154 
  155 Permission is hereby granted, free of charge, to any person obtaining a copy
  156 of this software and associated documentation files (the "Software"), to deal
  157 in the Software without restriction, including without limitation the rights
  158 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  159 copies of the Software, and to permit persons to whom the Software is
  160 furnished to do so, subject to the following conditions:
  161 
  162 The above copyright notice and this permission notice shall be included in
  163 all copies or substantial portions of the Software.
  164 
  165 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  166 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  167 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  168 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  169 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  170 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  171 THE SOFTWARE.
  172 
  173 
  174 -- License of GDC artefacts ---------------------------------------------------
  175 
  176                          The "Artistic License"
  177 
  178                                 Preamble
  179 
  180 The intent of this document is to state the conditions under which a
  181 Package may be copied, such that the Copyright Holder maintains some
  182 semblance of artistic control over the development of the package,
  183 while giving the users of the package the right to use and distribute
  184 the Package in a more-or-less customary fashion, plus the right to make
  185 reasonable modifications.
  186 
  187 Definitions:
  188 
  189         "Package" refers to the collection of files distributed by the
  190         Copyright Holder, and derivatives of that collection of files
  191         created through textual modification.
  192 
  193         "Standard Version" refers to such a Package if it has not been
  194         modified, or has been modified in accordance with the wishes
  195         of the Copyright Holder as specified below.
  196 
  197         "Copyright Holder" is whoever is named in the copyright or
  198         copyrights for the package.
  199 
  200         "You" is you, if you're thinking about copying or distributing
  201         this Package.
  202 
  203         "Reasonable copying fee" is whatever you can justify on the
  204         basis of media cost, duplication charges, time of people involved,
  205         and so on.  (You will not be required to justify it to the
  206         Copyright Holder, but only to the computing community at large
  207         as a market that must bear the fee.)
  208 
  209         "Freely Available" means that no fee is charged for the item
  210         itself, though there may be fees involved in handling the item.
  211         It also means that recipients of the item may redistribute it
  212         under the same conditions they received it.
  213 
  214 1. You may make and give away verbatim copies of the source form of the
  215 Standard Version of this Package without restriction, provided that you
  216 duplicate all of the original copyright notices and associated disclaimers.
  217 
  218 2. You may apply bug fixes, portability fixes and other modifications
  219 derived from the Public Domain or from the Copyright Holder.  A Package
  220 modified in such a way shall still be considered the Standard Version.
  221 
  222 3. You may otherwise modify your copy of this Package in any way, provided
  223 that you insert a prominent notice in each changed file stating how and
  224 when you changed that file, and provided that you do at least ONE of the
  225 following:
  226 
  227     a) place your modifications in the Public Domain or otherwise make them
  228     Freely Available, such as by posting said modifications to Usenet or
  229     an equivalent medium, or placing the modifications on a major archive
  230     site such as uunet.uu.net, or by allowing the Copyright Holder to include
  231     your modifications in the Standard Version of the Package.
  232 
  233     b) use the modified Package only within your corporation or organization.
  234 
  235     c) rename any non-standard executables so the names do not conflict
  236     with standard executables, which must also be provided, and provide
  237     a separate manual page for each non-standard executable that clearly
  238     documents how it differs from the Standard Version.
  239 
  240     d) make other distribution arrangements with the Copyright Holder.
  241 
  242 4. You may distribute the programs of this Package in object code or
  243 executable form, provided that you do at least ONE of the following:
  244 
  245     a) distribute a Standard Version of the executables and library files,
  246     together with instructions (in the manual page or equivalent) on where
  247     to get the Standard Version.
  248 
  249     b) accompany the distribution with the machine-readable source of
  250     the Package with your modifications.
  251 
  252     c) give non-standard executables non-standard names, and clearly
  253     document the differences in manual pages (or equivalent), together
  254     with instructions on where to get the Standard Version.
  255 
  256     d) make other distribution arrangements with the Copyright Holder.
  257 
  258 5. You may charge a reasonable copying fee for any distribution of this
  259 Package.  You may charge any fee you choose for support of this
  260 Package.  You may not charge a fee for this Package itself.  However,
  261 you may distribute this Package in aggregate with other (possibly
  262 commercial) programs as part of a larger (possibly commercial) software
  263 distribution provided that you do not advertise this Package as a
  264 product of your own.  You may embed this Package's interpreter within
  265 an executable of yours (by linking); this shall be construed as a mere
  266 form of aggregation, provided that the complete Standard Version of the
  267 interpreter is so embedded.
  268 
  269 6. The source code and object code supplied as input to or produced as
  270 output from the programs of this Package do not automatically fall
  271 under the copyright of this Package, but belong to whoever generated
  272 them, and may be sold commercially, and may be aggregated with this
  273 Package.
  274 
  275 7. Aggregation of this Package with a commercial distribution is always
  276 permitted provided that the use of this Package is embedded; that is,
  277 when no overt attempt is made to make this Package's interfaces visible
  278 to the end user of the commercial distribution.  Such use shall not be
  279 construed as a distribution of this Package.
  280 
  281 8. The name of the Copyright Holder may not be used to endorse or promote
  282 products derived from this software without specific prior written permission.
  283 
  284 9. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
  285 IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  286 WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  287 
  288                                 The End
  289 ---
  290 
  291                     GNU GENERAL PUBLIC LICENSE
  292                      Version 1, February 1989
  293 
  294  Copyright (C) 1989 Free Software Foundation, Inc.
  295                 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
  296  Everyone is permitted to copy and distribute verbatim copies
  297  of this license document, but changing it is not allowed.
  298 
  299                             Preamble
  300 
  301   The license agreements of most software companies try to keep users
  302 at the mercy of those companies.  By contrast, our General Public
  303 License is intended to guarantee your freedom to share and change free
  304 software--to make sure the software is free for all its users.  The
  305 General Public License applies to the Free Software Foundation's
  306 software and to any other program whose authors commit to using it.
  307 You can use it for your programs, too.
  308 
  309   When we speak of free software, we are referring to freedom, not
  310 price.  Specifically, the General Public License is designed to make
  311 sure that you have the freedom to give away or sell copies of free
  312 software, that you receive source code or can get it if you want it,
  313 that you can change the software or use pieces of it in new free
  314 programs; and that you know you can do these things.
  315 
  316   To protect your rights, we need to make restrictions that forbid
  317 anyone to deny you these rights or to ask you to surrender the rights.
  318 These restrictions translate to certain responsibilities for you if you
  319 distribute copies of the software, or if you modify it.
  320 
  321   For example, if you distribute copies of a such a program, whether
  322 gratis or for a fee, you must give the recipients all the rights that
  323 you have.  You must make sure that they, too, receive or can get the
  324 source code.  And you must tell them their rights.
  325 
  326   We protect your rights with two steps: (1) copyright the software, and
  327 (2) offer you this license which gives you legal permission to copy,
  328 distribute and/or modify the software.
  329 
  330   Also, for each author's protection and ours, we want to make certain
  331 that everyone understands that there is no warranty for this free
  332 software.  If the software is modified by someone else and passed on, we
  333 want its recipients to know that what they have is not the original, so
  334 that any problems introduced by others will not reflect on the original
  335 authors' reputations.
  336 
  337   The precise terms and conditions for copying, distribution and
  338 modification follow.
  339 
  340 
  341                     GNU GENERAL PUBLIC LICENSE
  342    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
  343 
  344   0. This License Agreement applies to any program or other work which
  345 contains a notice placed by the copyright holder saying it may be
  346 distributed under the terms of this General Public License.  The
  347 "Program", below, refers to any such program or work, and a "work based
  348 on the Program" means either the Program or any work containing the
  349 Program or a portion of it, either verbatim or with modifications.  Each
  350 licensee is addressed as "you".
  351 
  352   1. You may copy and distribute verbatim copies of the Program's source
  353 code as you receive it, in any medium, provided that you conspicuously and
  354 appropriately publish on each copy an appropriate copyright notice and
  355 disclaimer of warranty; keep intact all the notices that refer to this
  356 General Public License and to the absence of any warranty; and give any
  357 other recipients of the Program a copy of this General Public License
  358 along with the Program.  You may charge a fee for the physical act of
  359 transferring a copy.
  360 
  361   2. You may modify your copy or copies of the Program or any portion of
  362 it, and copy and distribute such modifications under the terms of Paragraph
  363 1 above, provided that you also do the following:
  364 
  365     a) cause the modified files to carry prominent notices stating that
  366     you changed the files and the date of any change; and
  367 
  368     b) cause the whole of any work that you distribute or publish, that
  369     in whole or in part contains the Program or any part thereof, either
  370     with or without modifications, to be licensed at no charge to all
  371     third parties under the terms of this General Public License (except
  372     that you may choose to grant warranty protection to some or all
  373     third parties, at your option).
  374 
  375     c) If the modified program normally reads commands interactively when
  376     run, you must cause it, when started running for such interactive use
  377     in the simplest and most usual way, to print or display an
  378     announcement including an appropriate copyright notice and a notice
  379     that there is no warranty (or else, saying that you provide a
  380     warranty) and that users may redistribute the program under these
  381     conditions, and telling the user how to view a copy of this General
  382     Public License.
  383 
  384     d) You may charge a fee for the physical act of transferring a
  385     copy, and you may at your option offer warranty protection in
  386     exchange for a fee.
  387 
  388 Mere aggregation of another independent work with the Program (or its
  389 derivative) on a volume of a storage or distribution medium does not bring
  390 the other work under the scope of these terms.
  391 
  392 
  393   3. You may copy and distribute the Program (or a portion or derivative of
  394 it, under Paragraph 2) in object code or executable form under the terms of
  395 Paragraphs 1 and 2 above provided that you also do one of the following:
  396 
  397     a) accompany it with the complete corresponding machine-readable
  398     source code, which must be distributed under the terms of
  399     Paragraphs 1 and 2 above; or,
  400 
  401     b) accompany it with a written offer, valid for at least three
  402     years, to give any third party free (except for a nominal charge
  403     for the cost of distribution) a complete machine-readable copy of the
  404     corresponding source code, to be distributed under the terms of
  405     Paragraphs 1 and 2 above; or,
  406 
  407     c) accompany it with the information you received as to where the
  408     corresponding source code may be obtained.  (This alternative is
  409     allowed only for noncommercial distribution and only if you
  410     received the program in object code or executable form alone.)
  411 
  412 Source code for a work means the preferred form of the work for making
  413 modifications to it.  For an executable file, complete source code means
  414 all the source code for all modules it contains; but, as a special
  415 exception, it need not include source code for modules which are standard
  416 libraries that accompany the operating system on which the executable
  417 file runs, or for standard header files or definitions files that
  418 accompany that operating system.
  419 
  420   4. You may not copy, modify, sublicense, distribute or transfer the
  421 Program except as expressly provided under this General Public License.
  422 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
  423 the Program is void, and will automatically terminate your rights to use
  424 the Program under this License.  However, parties who have received
  425 copies, or rights to use copies, from you under this General Public
  426 License will not have their licenses terminated so long as such parties
  427 remain in full compliance.
  428 
  429   5. By copying, distributing or modifying the Program (or any work based
  430 on the Program) you indicate your acceptance of this license to do so,
  431 and all its terms and conditions.
  432 
  433   6. Each time you redistribute the Program (or any work based on the
  434 Program), the recipient automatically receives a license from the original
  435 licensor to copy, distribute or modify the Program subject to these
  436 terms and conditions.  You may not impose any further restrictions on the
  437 recipients' exercise of the rights granted herein.
  438 
  439 
  440   7. The Free Software Foundation may publish revised and/or new versions
  441 of the General Public License from time to time.  Such new versions will
  442 be similar in spirit to the present version, but may differ in detail to
  443 address new problems or concerns.
  444 
  445 Each version is given a distinguishing version number.  If the Program
  446 specifies a version number of the license which applies to it and "any
  447 later version", you have the option of following the terms and conditions
  448 either of that version or of any later version published by the Free
  449 Software Foundation.  If the Program does not specify a version number of
  450 the license, you may choose any version ever published by the Free Software
  451 Foundation.
  452 
  453   8. If you wish to incorporate parts of the Program into other free
  454 programs whose distribution conditions are different, write to the author
  455 to ask for permission.  For software which is copyrighted by the Free
  456 Software Foundation, write to the Free Software Foundation; we sometimes
  457 make exceptions for this.  Our decision will be guided by the two goals
  458 of preserving the free status of all derivatives of our free software and
  459 of promoting the sharing and reuse of software generally.
  460 
  461                             NO WARRANTY
  462 
  463   9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
  464 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
  465 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
  466 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
  467 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  468 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
  469 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
  470 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
  471 REPAIR OR CORRECTION.
  472 
  473   10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  474 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
  475 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
  476 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
  477 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
  478 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
  479 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
  480 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
  481 POSSIBILITY OF SUCH DAMAGES.
  482 
  483                      END OF TERMS AND CONDITIONS
  484 
  485 
  486         Appendix: How to Apply These Terms to Your New Programs
  487 
  488   If you develop a new program, and you want it to be of the greatest
  489 possible use to humanity, the best way to achieve this is to make it
  490 free software which everyone can redistribute and change under these
  491 terms.
  492 
  493   To do so, attach the following notices to the program.  It is safest to
  494 attach them to the start of each source file to most effectively convey
  495 the exclusion of warranty; and each file should have at least the
  496 "copyright" line and a pointer to where the full notice is found.
  497 
  498     <one line to give the program's name and a brief idea of what it does.>
  499     Copyright (C) 19yy  <name of author>
  500 
  501     This program is free software; you can redistribute it and/or modify
  502     it under the terms of the GNU General Public License as published by
  503     the Free Software Foundation; either version 1, or (at your option)
  504     any later version.
  505 
  506     This program is distributed in the hope that it will be useful,
  507     but WITHOUT ANY WARRANTY; without even the implied warranty of
  508     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  509     GNU General Public License for more details.
  510 
  511     You should have received a copy of the GNU General Public License
  512     along with this program; if not, write to the Free Software Foundation,
  513     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  514 
  515 Also add information on how to contact you by electronic and paper mail.
  516 
  517 If the program is interactive, make it output a short notice like this
  518 when it starts in an interactive mode:
  519 
  520     Gnomovision version 69, Copyright (C) 19xx name of author
  521     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  522     This is free software, and you are welcome to redistribute it
  523     under certain conditions; type `show c' for details.
  524 
  525 The hypothetical commands `show w' and `show c' should show the
  526 appropriate parts of the General Public License.  Of course, the
  527 commands you use may be called something other than `show w' and `show
  528 c'; they could even be mouse-clicks or menu items--whatever suits your
  529 program.
  530 
  531 You should also get your employer (if you work as a programmer) or your
  532 school, if any, to sign a "copyright disclaimer" for the program, if
  533 necessary.  Here a sample; alter the names:
  534 
  535   Yoyodyne, Inc., hereby disclaims all copyright interest in the
  536   program `Gnomovision' (a program to direct compilers to make passes
  537   at assemblers) written by James Hacker.
  538 
  539   <signature of Ty Coon>, 1 April 1989
  540   Ty Coon, President of Vice
  541 
  542 That's all there is to it!