1 |
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2 | GNU LIBRARY GENERAL PUBLIC LICENSE
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3 | ==================================
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4 | Version 2, June 1991
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5 |
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6 | Copyright (C) 1991 Free Software Foundation, Inc.
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7 | 675 Mass Ave, Cambridge, MA 02139, USA
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8 | Everyone is permitted to copy and distribute verbatim copies
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9 | of this license document, but changing it is not allowed.
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10 |
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11 | [This is the first released version of the library GPL. It is
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12 | numbered 2 because it goes with version 2 of the ordinary GPL.]
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13 |
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14 | Preamble
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15 |
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16 | The licenses for most software are designed to take away your
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17 | freedom to share and change it. By contrast, the GNU General
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18 | Public Licenses are intended to guarantee your freedom to share
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19 | and change free software--to make sure the software is free for
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20 | all its users.
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21 |
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22 | This license, the Library General Public License, applies to
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23 | some specially designated Free Software Foundation software, and
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24 | to any other libraries whose authors decide to use it. You can
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25 | use it for your libraries, too.
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26 |
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27 | When we speak of free software, we are referring to freedom, not
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28 | price. Our General Public Licenses are designed to make sure
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29 | that you have the freedom to distribute copies of free software
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30 | (and charge for this service if you wish), that you receive
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31 | source code or can get it if you want it, that you can change
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32 | the software or use pieces of it in new free programs; and that
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33 | you know you can do these things.
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34 |
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35 | To protect your rights, we need to make restrictions that forbid
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36 | anyone to deny you these rights or to ask you to surrender the
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37 | rights. These restrictions translate to certain responsibilities
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38 | for you if you distribute copies of the library, or if you
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39 | modify it.
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40 |
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41 | For example, if you distribute copies of the library, whether
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42 | gratis or for a fee, you must give the recipients all the rights
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43 | that we gave you. You must make sure that they, too, receive or
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44 | can get the source code. If you link a program with the
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45 | library, you must provide complete object files to the
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46 | recipients so that they can relink them with the library, after
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47 | making changes to the library and recompiling it. And you must
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48 | show them these terms so they know their rights.
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49 |
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50 | Our method of protecting your rights has two steps: (1)
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51 | copyright the library, and (2) offer you this license which
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52 | gives you legal permission to copy, distribute and/or modify the
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53 | library.
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54 |
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55 | Also, for each distributor's protection, we want to make certain
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56 | that everyone understands that there is no warranty for this
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57 | free library. If the library is modified by someone else and
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58 | passed on, we want its recipients to know that what they have is
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59 | not the original version, so that any problems introduced by
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60 | others will not reflect on the original authors' reputations.
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61 |
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62 | Finally, any free program is threatened constantly by software
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63 | patents. We wish to avoid the danger that companies
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64 | distributing free software will individually obtain patent
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65 | licenses, thus in effect transforming the program into
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66 | proprietary software. To prevent this, we have made it clear
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67 | that any patent must be licensed for everyone's free use or not
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68 | licensed at all.
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69 |
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70 | Most GNU software, including some libraries, is covered by the
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71 | ordinary GNU General Public License, which was designed for
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72 | utility programs. This license, the GNU Library General Public
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73 | License, applies to certain designated libraries. This license
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74 | is quite different from the ordinary one; be sure to read it in
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75 | full, and don't assume that anything in it is the same as in the
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76 | ordinary license.
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77 |
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78 | The reason we have a separate public license for some libraries
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79 | is that they blur the distinction we usually make between
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80 | modifying or adding to a program and simply using it. Linking a
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81 | program with a library, without changing the library, is in some
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82 | sense simply using the library, and is analogous to running a
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83 | utility program or application program. However, in a textual
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84 | and legal sense, the linked executable is a combined work, a
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85 | derivative of the original library, and the ordinary General
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86 | Public License treats it as such.
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87 |
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88 | Because of this blurred distinction, using the ordinary General
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89 | Public License for libraries did not effectively promote
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90 | software sharing, because most developers did not use the
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91 | libraries. We concluded that weaker conditions might promote
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92 | sharing better.
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93 |
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94 | However, unrestricted linking of non-free programs would deprive
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95 | the users of those programs of all benefit from the free status
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96 | of the libraries themselves. This Library General Public
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97 | License is intended to permit developers of non-free programs to
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98 | use free libraries, while preserving your freedom as a user of
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99 | such programs to change the free libraries that are incorporated
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100 | in them. (We have not seen how to achieve this as regards
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101 | changes in header files, but we have achieved it as regards
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102 | changes in the actual functions of the Library.) The hope is
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103 | that this will lead to faster development of free libraries.
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104 |
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105 | The precise terms and conditions for copying, distribution and
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106 | modification follow. Pay close attention to the difference
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107 | between a "work based on the library" and a "work that uses the
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108 | library". The former contains code derived from the library,
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109 | while the latter only works together with the library.
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110 |
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111 | Note that it is possible for a library to be covered by the
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112 | ordinary General Public License rather than by this special one.
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113 |
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114 | GNU LIBRARY GENERAL PUBLIC LICENSE
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115 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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116 |
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117 | 0. This License Agreement applies to any software library which
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118 | contains a notice placed by the copyright holder or other
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119 | authorized party saying it may be distributed under the terms of
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120 | this Library General Public License (also called "this
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121 | License"). Each licensee is addressed as "you".
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122 |
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123 | A "library" means a collection of software functions and/or data
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124 | prepared so as to be conveniently linked with application
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126 | executables.
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127 |
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128 | The "Library", below, refers to any such software library or
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129 | work which has been distributed under these terms. A "work
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131 | work under copyright law: that is to say, a work containing the
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132 | Library or a portion of it, either verbatim or with
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133 | modifications and/or translated straightforwardly into another
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135 | limitation in the term "modification".)
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136 |
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137 | "Source code" for a work means the preferred form of the work
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138 | for making modifications to it. For a library, complete source
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140 | any associated interface definition files, plus the scripts used
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141 | to control compilation and installation of the library.
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142 |
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143 | Activities other than copying, distribution and modification are
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144 | not covered by this License; they are outside its scope. The
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145 | act of running a program using the Library is not restricted,
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146 | and output from such a program is covered only if its contents
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149 | depends on what the Library does and what the program that uses
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150 | the Library does.
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151 |
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152 | 1. You may copy and distribute verbatim copies of the Library's
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154 | that you conspicuously and appropriately publish on each copy an
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155 | appropriate copyright notice and disclaimer of warranty; keep
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156 | intact all the notices that refer to this License and to the
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158 | along with the Library.
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159 |
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160 | You may charge a fee for the physical act of transferring a
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162 | exchange for a fee.
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163 |
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164 | 2. You may modify your copy or copies of the Library or any
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165 | portion of it, thus forming a work based on the Library, and
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166 | copy and distribute such modifications or work under the terms
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167 | of Section 1 above, provided that you also meet all of these
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168 | conditions:
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169 |
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170 | a) The modified work must itself be a software library.
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171 |
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172 | b) You must cause the files modified to carry prominent notices
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173 | stating that you changed the files and the date of any change.
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174 |
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175 | c) You must cause the whole of the work to be licensed at no
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176 | charge to all third parties under the terms of this License.
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177 |
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178 | d) If a facility in the modified Library refers to a function or a
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179 | table of data to be supplied by an application program that uses
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180 | the facility, other than as an argument passed when the facility
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182 | in the event an application does not supply such function or
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183 | table, the facility still operates, and performs whatever part of
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184 | its purpose remains meaningful.
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185 |
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186 | (For example, a function in a library to compute square roots has
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187 | a purpose that is entirely well-defined independent of the
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188 | application. Therefore, Subsection 2d requires that any
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189 | application-supplied function or table used by this function must
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190 | be optional: if the application does not supply it, the square
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191 | root function must still compute square roots.)
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192 |
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193 | These requirements apply to the modified work as a whole. If
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194 | identifiable sections of that work are not derived from the
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195 | Library, and can be reasonably considered independent and
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197 | do not apply to those sections when you distribute them as
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198 | separate works. But when you distribute the same sections as
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199 | part of a whole which is a work based on the Library, the
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200 | distribution of the whole must be on the terms of this License,
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201 | whose permissions for other licensees extend to the entire
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202 | whole, and thus to each and every part regardless of who wrote
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203 | it.
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204 |
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205 | Thus, it is not the intent of this section to claim rights or
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206 | contest your rights to work written entirely by you; rather, the
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207 | intent is to exercise the right to control the distribution of
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208 | derivative or collective works based on the Library.
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209 |
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210 | In addition, mere aggregation of another work not based on the
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211 | Library with the Library (or with a work based on the Library)
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212 | on a volume of a storage or distribution medium does not bring
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213 | the other work under the scope of this License.
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214 |
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215 | 3. You may opt to apply the terms of the ordinary GNU General
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216 | Public License instead of this License to a given copy of the
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217 | Library. To do this, you must alter all the notices that refer
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218 | to this License, so that they refer to the ordinary GNU General
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220 | newer version than version 2 of the ordinary GNU General Public
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221 | License has appeared, then you can specify that version instead
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223 |
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224 | Once this change is made in a given copy, it is irreversible for
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225 | that copy, so the ordinary GNU General Public License applies to
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226 | all subsequent copies and derivative works made from that copy.
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227 |
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228 | This option is useful when you wish to copy part of the code of
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229 | the Library into a program that is not a library.
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230 |
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231 | 4. You may copy and distribute the Library (or a portion or
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232 | derivative of it, under Section 2) in object code or executable
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233 | form under the terms of Sections 1 and 2 above provided that you
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234 | accompany it with the complete corresponding machine-readable
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235 | source code, which must be distributed under the terms of
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236 | Sections 1 and 2 above on a medium customarily used for software
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237 | interchange.
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238 |
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239 | If distribution of object code is made by offering access to
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240 | copy from a designated place, then offering equivalent access to
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241 | copy the source code from the same place satisfies the
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242 | requirement to distribute the source code, even though third
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243 | parties are not compelled to copy the source along with the
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244 | object code.
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245 |
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246 | 5. A program that contains no derivative of any portion of the
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250 | of the Library, and therefore falls outside the scope of this
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252 |
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256 | "work that uses the library". The executable is therefore
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257 | covered by this License. Section 6 states terms for distribution
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258 | of such executables.
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259 |
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260 | When a "work that uses the Library" uses material from a header
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262 | may be a derivative work of the Library even though the source
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264 | the work can be linked without the Library, or if the work is
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265 | itself a library. The threshold for this to be true is not
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266 | precisely defined by law.
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267 |
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268 | If such an object file uses only numerical parameters, data
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269 | structure layouts and accessors, and small macros and small
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270 | inline functions (ten lines or less in length), then the use of
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271 | the object file is unrestricted, regardless of whether it is
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272 | legally a derivative work. (Executables containing this object
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273 | code plus portions of the Library will still fall under Section
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274 | 6.)
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275 |
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276 | Otherwise, if the work is a derivative of the Library, you may
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277 | distribute the object code for the work under the terms of
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278 | Section 6. Any executables containing that work also fall under
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279 | Section 6, whether or not they are linked directly with the
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280 | Library itself.
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281 |
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282 | 6. As an exception to the Sections above, you may also compile
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283 | or link a "work that uses the Library" with the Library to
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284 | produce a work containing portions of the Library, and
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285 | distribute that work under terms of your choice, provided that
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286 | the terms permit modification of the work for the customer's own
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287 | use and reverse engineering for debugging such modifications.
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288 |
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289 | You must give prominent notice with each copy of the work that
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290 | the Library is used in it and that the Library and its use are
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291 | covered by this License. You must supply a copy of this
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292 | License. If the work during execution displays copyright
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293 | notices, you must include the copyright notice for the Library
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294 | among them, as well as a reference directing the user to the
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295 | copy of this License. Also, you must do one of these things:
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296 |
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297 | a) Accompany the work with the complete corresponding
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298 | machine-readable source code for the Library including whatever
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299 | changes were used in the work (which must be distributed under
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300 | Sections 1 and 2 above); and, if the work is an executable linked
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301 | with the Library, with the complete machine-readable "work that
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302 | uses the Library", as object code and/or source code, so that the
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303 | user can modify the Library and then relink to produce a modified
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304 | executable containing the modified Library. (It is understood
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305 | that the user who changes the contents of definitions files in the
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306 | Library will not necessarily be able to recompile the application
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307 | to use the modified definitions.)
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308 |
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309 | b) Accompany the work with a written offer, valid for at
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310 | least three years, to give the same user the materials
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311 | specified in Subsection 6a, above, for a charge no more
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312 | than the cost of performing this distribution.
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313 |
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314 | c) If distribution of the work is made by offering access to copy
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315 | from a designated place, offer equivalent access to copy the above
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316 | specified materials from the same place.
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317 |
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318 | d) Verify that the user has already received a copy of these
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319 | materials or that you have already sent this user a copy.
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320 |
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321 | For an executable, the required form of the "work that uses the
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322 | Library" must include any data and utility programs needed for
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323 | reproducing the executable from it. However, as a special
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324 | exception, the source code distributed need not include anything
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325 | that is normally distributed (in either source or binary form)
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326 | with the major components (compiler, kernel, and so on) of the
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327 | operating system on which the executable runs, unless that
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328 | component itself accompanies the executable.
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329 |
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330 | It may happen that this requirement contradicts the license
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331 | restrictions of other proprietary libraries that do not normally
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332 | accompany the operating system. Such a contradiction means you
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333 | cannot use both them and the Library together in an executable
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334 | that you distribute.
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335 |
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336 | 7. You may place library facilities that are a work based on the
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337 | Library side-by-side in a single library together with other
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338 | library facilities not covered by this License, and distribute
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339 | such a combined library, provided that the separate distribution
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340 | of the work based on the Library and of the other library
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341 | facilities is otherwise permitted, and provided that you do
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342 | these two things:
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343 |
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344 | a) Accompany the combined library with a copy of the same work
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345 | based on the Library, uncombined with any other library
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346 | facilities. This must be distributed under the terms of the
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347 | Sections above.
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348 |
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349 | b) Give prominent notice with the combined library of the fact
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350 | that part of it is a work based on the Library, and explaining
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351 | where to find the accompanying uncombined form of the same work.
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352 |
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353 | 8. You may not copy, modify, sublicense, link with, or
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354 | distribute the Library except as expressly provided under this
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355 | License. Any attempt otherwise to copy, modify, sublicense,
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356 | link with, or distribute the Library is void, and will
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357 | automatically terminate your rights under this License.
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358 | However, parties who have received copies, or rights, from you
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359 | under this License will not have their licenses terminated so
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360 | long as such parties remain in full compliance.
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361 |
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362 | 9. You are not required to accept this License, since you have
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363 | not signed it. However, nothing else grants you permission to
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364 | modify or distribute the Library or its derivative works. These
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365 | actions are prohibited by law if you do not accept this
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366 | License. Therefore, by modifying or distributing the Library
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367 | (or any work based on the Library), you indicate your acceptance
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368 | of this License to do so, and all its terms and conditions for
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369 | copying, distributing or modifying the Library or works based on
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370 | it.
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371 |
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372 | 10. Each time you redistribute the Library (or any work based on
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373 | the Library), the recipient automatically receives a license
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375 | modify the Library subject to these terms and conditions. You
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376 | may not impose any further restrictions on the recipients'
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378 | for enforcing compliance by third parties to this License.
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379 |
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380 | 11. If, as a consequence of a court judgment or allegation of
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381 | patent infringement or for any other reason (not limited to
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382 | patent issues), conditions are imposed on you (whether by court
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383 | order, agreement or otherwise) that contradict the conditions of
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384 | this License, they do not excuse you from the conditions of this
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385 | License. If you cannot distribute so as to satisfy
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386 | simultaneously your obligations under this License and any other
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387 | pertinent obligations, then as a consequence you may not
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388 | distribute the Library at all. For example, if a patent license
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389 | would not permit royalty-free redistribution of the Library by
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390 | all those who receive copies directly or indirectly through you,
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391 | then the only way you could satisfy both it and this License
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392 | would be to refrain entirely from distribution of the Library.
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393 |
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394 | If any portion of this section is held invalid or unenforceable
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395 | under any particular circumstance, the balance of the section is
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396 | intended to apply, and the section as a whole is intended to
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397 | apply in other circumstances.
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398 |
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399 | It is not the purpose of this section to induce you to infringe
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400 | any patents or other property right claims or to contest
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401 | validity of any such claims; this section has the sole purpose
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402 | of protecting the integrity of the free software distribution
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404 | people have made generous contributions to the wide range of
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405 | software distributed through that system in reliance on
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406 | consistent application of that system; it is up to the
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407 | author/donor to decide if he or she is willing to distribute
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408 | software through any other system and a licensee cannot impose
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409 | that choice.
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410 |
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411 | This section is intended to make thoroughly clear what is
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412 | believed to be a consequence of the rest of this License.
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413 |
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414 | 12. If the distribution and/or use of the Library is restricted
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415 | in certain countries either by patents or by copyrighted
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416 | interfaces, the original copyright holder who places the Library
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417 | under this License may add an explicit geographical distribution
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418 | limitation excluding those countries, so that distribution is
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419 | permitted only in or among countries not thus excluded. In such
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420 | case, this License incorporates the limitation as if written in
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421 | the body of this License.
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422 |
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423 | 13. The Free Software Foundation may publish revised and/or new
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424 | versions of the Library General Public License from time to
|
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425 | time. Such new versions will be similar in spirit to the present
|
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426 | version, but may differ in detail to address new problems or
|
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427 | concerns.
|
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428 |
|
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429 | Each version is given a distinguishing version number. If the
|
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430 | Library specifies a version number of this License which applies
|
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431 | to it and "any later version", you have the option of following
|
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432 | the terms and conditions either of that version or of any later
|
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433 | version published by the Free Software Foundation. If the
|
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434 | Library does not specify a license version number, you may
|
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435 | choose any version ever published by the Free Software
|
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436 | Foundation.
|
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437 |
|
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438 | 14. If you wish to incorporate parts of the Library into other
|
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439 | free programs whose distribution conditions are incompatible
|
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440 | with these, write to the author to ask for permission. For
|
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441 | software which is copyrighted by the Free Software Foundation,
|
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442 | write to the Free Software Foundation; we sometimes make
|
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443 | exceptions for this. Our decision will be guided by the two
|
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444 | goals of preserving the free status of all derivatives of our
|
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445 | free software and of promoting the sharing and reuse of software
|
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446 | generally.
|
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447 |
|
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448 | NO WARRANTY
|
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449 |
|
---|
450 | 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
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451 | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
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452 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
---|
453 | OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND,
|
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454 | EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
455 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
---|
456 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
---|
457 | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
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458 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
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459 |
|
---|
460 | 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
---|
461 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
---|
462 | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
---|
463 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
|
---|
464 | DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
---|
465 | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
---|
466 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
---|
467 | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
---|
468 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
|
---|
469 |
|
---|
470 | END OF TERMS AND CONDITIONS
|
---|
471 |
|
---|
472 | Appendix: How to Apply These Terms to Your New Libraries
|
---|
473 |
|
---|
474 | If you develop a new library, and you want it to be of the
|
---|
475 | greatest possible use to the public, we recommend making it free
|
---|
476 | software that everyone can redistribute and change. You can do
|
---|
477 | so by permitting redistribution under these terms (or,
|
---|
478 | alternatively, under the terms of the ordinary General Public
|
---|
479 | License).
|
---|
480 |
|
---|
481 | To apply these terms, attach the following notices to the
|
---|
482 | library. It is safest to attach them to the start of each
|
---|
483 | source file to most effectively convey the exclusion of
|
---|
484 | warranty; and each file should have at least the "copyright"
|
---|
485 | line and a pointer to where the full notice is found.
|
---|
486 |
|
---|
487 | <one line to give the library's name and a brief idea of what it does.>
|
---|
488 | Copyright (C) <year> <name of author>
|
---|
489 |
|
---|
490 | This library is free software; you can redistribute it and/or
|
---|
491 | modify it under the terms of the GNU Library General Public
|
---|
492 | License as published by the Free Software Foundation; either
|
---|
493 | version 2 of the License, or (at your option) any later version.
|
---|
494 |
|
---|
495 | This library is distributed in the hope that it will be useful,
|
---|
496 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
497 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
498 | Library General Public License for more details.
|
---|
499 |
|
---|
500 | You should have received a copy of the GNU Library General Public
|
---|
501 | License along with this library; if not, write to the Free
|
---|
502 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
503 |
|
---|
504 | Also add information on how to contact you by electronic and paper mail.
|
---|
505 |
|
---|
506 | You should also get your employer (if you work as a programmer) or your
|
---|
507 | school, if any, to sign a "copyright disclaimer" for the library, if
|
---|
508 | necessary. Here is a sample; alter the names:
|
---|
509 |
|
---|
510 | Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
---|
511 | library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
---|
512 |
|
---|
513 | <signature of Ty Coon>, 1 April 1990
|
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514 | Ty Coon, President of Vice
|
---|
515 |
|
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516 | That's all there is to it!
|
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517 |
|
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