annotate COPYING @ 1125:a6011e1394d9

Apparently MacOS X will sometimes pass command line arguments to a Cocoa app as an openFile() message, so we have to make sure we were launched from the Finder before accepting these as drag'n'drop documents, or they will just duplicate what's already in argc/argv.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 22 Aug 2005 14:18:15 +0000
parents 74212992fb08
children e1b8e1b97b67
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1 GNU LIBRARY GENERAL PUBLIC LICENSE
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2 Version 2, June 1991
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3
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4 Copyright (C) 1991 Free Software Foundation, Inc.
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5 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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6 Everyone is permitted to copy and distribute verbatim copies
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7 of this license document, but changing it is not allowed.
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8
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9 [This is the first released version of the library GPL. It is
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10 numbered 2 because it goes with version 2 of the ordinary GPL.]
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11
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12 Preamble
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13
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14 The licenses for most software are designed to take away your
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15 freedom to share and change it. By contrast, the GNU General Public
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16 Licenses are intended to guarantee your freedom to share and change
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17 free software--to make sure the software is free for all its users.
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18
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19 This license, the Library General Public License, applies to some
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20 specially designated Free Software Foundation software, and to any
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21 other libraries whose authors decide to use it. You can use it for
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22 your libraries, too.
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23
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24 When we speak of free software, we are referring to freedom, not
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25 price. Our General Public Licenses are designed to make sure that you
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26 have the freedom to distribute copies of free software (and charge for
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27 this service if you wish), that you receive source code or can get it
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28 if you want it, that you can change the software or use pieces of it
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29 in new free programs; and that you know you can do these things.
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30
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31 To protect your rights, we need to make restrictions that forbid
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32 anyone to deny you these rights or to ask you to surrender the rights.
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33 These restrictions translate to certain responsibilities for you if
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34 you distribute copies of the library, or if you modify it.
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35
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36 For example, if you distribute copies of the library, whether gratis
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37 or for a fee, you must give the recipients all the rights that we gave
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38 you. You must make sure that they, too, receive or can get the source
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39 code. If you link a program with the library, you must provide
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40 complete object files to the recipients so that they can relink them
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41 with the library, after making changes to the library and recompiling
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42 it. And you must show them these terms so they know their rights.
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43
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44 Our method of protecting your rights has two steps: (1) copyright
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45 the library, and (2) offer you this license which gives you legal
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46 permission to copy, distribute and/or modify the library.
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47
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48 Also, for each distributor's protection, we want to make certain
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49 that everyone understands that there is no warranty for this free
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50 library. If the library is modified by someone else and passed on, we
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51 want its recipients to know that what they have is not the original
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52 version, so that any problems introduced by others will not reflect on
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53 the original authors' reputations.
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54
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55 Finally, any free program is threatened constantly by software
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56 patents. We wish to avoid the danger that companies distributing free
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57 software will individually obtain patent licenses, thus in effect
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58 transforming the program into proprietary software. To prevent this,
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59 we have made it clear that any patent must be licensed for everyone's
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60 free use or not licensed at all.
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61
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62 Most GNU software, including some libraries, is covered by the ordinary
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63 GNU General Public License, which was designed for utility programs. This
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64 license, the GNU Library General Public License, applies to certain
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65 designated libraries. This license is quite different from the ordinary
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66 one; be sure to read it in full, and don't assume that anything in it is
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67 the same as in the ordinary license.
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68
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69 The reason we have a separate public license for some libraries is that
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70 they blur the distinction we usually make between modifying or adding to a
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71 program and simply using it. Linking a program with a library, without
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72 changing the library, is in some sense simply using the library, and is
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73 analogous to running a utility program or application program. However, in
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74 a textual and legal sense, the linked executable is a combined work, a
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75 derivative of the original library, and the ordinary General Public License
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76 treats it as such.
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77
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78 Because of this blurred distinction, using the ordinary General
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79 Public License for libraries did not effectively promote software
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80 sharing, because most developers did not use the libraries. We
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81 concluded that weaker conditions might promote sharing better.
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82
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83 However, unrestricted linking of non-free programs would deprive the
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84 users of those programs of all benefit from the free status of the
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85 libraries themselves. This Library General Public License is intended to
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86 permit developers of non-free programs to use free libraries, while
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87 preserving your freedom as a user of such programs to change the free
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88 libraries that are incorporated in them. (We have not seen how to achieve
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89 this as regards changes in header files, but we have achieved it as regards
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90 changes in the actual functions of the Library.) The hope is that this
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91 will lead to faster development of free libraries.
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92
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93 The precise terms and conditions for copying, distribution and
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94 modification follow. Pay close attention to the difference between a
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95 "work based on the library" and a "work that uses the library". The
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96 former contains code derived from the library, while the latter only
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97 works together with the library.
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98
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99 Note that it is possible for a library to be covered by the ordinary
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100 General Public License rather than by this special one.
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101
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102 GNU LIBRARY GENERAL PUBLIC LICENSE
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103 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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104
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105 0. This License Agreement applies to any software library which
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106 contains a notice placed by the copyright holder or other authorized
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107 party saying it may be distributed under the terms of this Library
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108 General Public License (also called "this License"). Each licensee is
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109 addressed as "you".
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110
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111 A "library" means a collection of software functions and/or data
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112 prepared so as to be conveniently linked with application programs
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113 (which use some of those functions and data) to form executables.
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114
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115 The "Library", below, refers to any such software library or work
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116 which has been distributed under these terms. A "work based on the
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117 Library" means either the Library or any derivative work under
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118 copyright law: that is to say, a work containing the Library or a
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119 portion of it, either verbatim or with modifications and/or translated
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120 straightforwardly into another language. (Hereinafter, translation is
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121 included without limitation in the term "modification".)
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122
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123 "Source code" for a work means the preferred form of the work for
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124 making modifications to it. For a library, complete source code means
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125 all the source code for all modules it contains, plus any associated
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126 interface definition files, plus the scripts used to control compilation
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127 and installation of the library.
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128
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129 Activities other than copying, distribution and modification are not
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130 covered by this License; they are outside its scope. The act of
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131 running a program using the Library is not restricted, and output from
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132 such a program is covered only if its contents constitute a work based
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133 on the Library (independent of the use of the Library in a tool for
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134 writing it). Whether that is true depends on what the Library does
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135 and what the program that uses the Library does.
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136
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137 1. You may copy and distribute verbatim copies of the Library's
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138 complete source code as you receive it, in any medium, provided that
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139 you conspicuously and appropriately publish on each copy an
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140 appropriate copyright notice and disclaimer of warranty; keep intact
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141 all the notices that refer to this License and to the absence of any
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142 warranty; and distribute a copy of this License along with the
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143 Library.
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144
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145 You may charge a fee for the physical act of transferring a copy,
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146 and you may at your option offer warranty protection in exchange for a
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147 fee.
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148
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149 2. You may modify your copy or copies of the Library or any portion
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150 of it, thus forming a work based on the Library, and copy and
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151 distribute such modifications or work under the terms of Section 1
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152 above, provided that you also meet all of these conditions:
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153
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154 a) The modified work must itself be a software library.
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155
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156 b) You must cause the files modified to carry prominent notices
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157 stating that you changed the files and the date of any change.
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158
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159 c) You must cause the whole of the work to be licensed at no
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160 charge to all third parties under the terms of this License.
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161
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162 d) If a facility in the modified Library refers to a function or a
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163 table of data to be supplied by an application program that uses
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164 the facility, other than as an argument passed when the facility
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165 is invoked, then you must make a good faith effort to ensure that,
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166 in the event an application does not supply such function or
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167 table, the facility still operates, and performs whatever part of
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168 its purpose remains meaningful.
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169
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170 (For example, a function in a library to compute square roots has
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171 a purpose that is entirely well-defined independent of the
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172 application. Therefore, Subsection 2d requires that any
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173 application-supplied function or table used by this function must
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174 be optional: if the application does not supply it, the square
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175 root function must still compute square roots.)
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176
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177 These requirements apply to the modified work as a whole. If
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178 identifiable sections of that work are not derived from the Library,
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179 and can be reasonably considered independent and separate works in
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180 themselves, then this License, and its terms, do not apply to those
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181 sections when you distribute them as separate works. But when you
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182 distribute the same sections as part of a whole which is a work based
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183 on the Library, the distribution of the whole must be on the terms of
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184 this License, whose permissions for other licensees extend to the
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185 entire whole, and thus to each and every part regardless of who wrote
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186 it.
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187
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188 Thus, it is not the intent of this section to claim rights or contest
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189 your rights to work written entirely by you; rather, the intent is to
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190 exercise the right to control the distribution of derivative or
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191 collective works based on the Library.
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192
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193 In addition, mere aggregation of another work not based on the Library
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194 with the Library (or with a work based on the Library) on a volume of
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195 a storage or distribution medium does not bring the other work under
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196 the scope of this License.
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197
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198 3. You may opt to apply the terms of the ordinary GNU General Public
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199 License instead of this License to a given copy of the Library. To do
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200 this, you must alter all the notices that refer to this License, so
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201 that they refer to the ordinary GNU General Public License, version 2,
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202 instead of to this License. (If a newer version than version 2 of the
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203 ordinary GNU General Public License has appeared, then you can specify
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204 that version instead if you wish.) Do not make any other change in
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205 these notices.
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206
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207 Once this change is made in a given copy, it is irreversible for
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208 that copy, so the ordinary GNU General Public License applies to all
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209 subsequent copies and derivative works made from that copy.
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210
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211 This option is useful when you wish to copy part of the code of
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212 the Library into a program that is not a library.
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213
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214 4. You may copy and distribute the Library (or a portion or
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215 derivative of it, under Section 2) in object code or executable form
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216 under the terms of Sections 1 and 2 above provided that you accompany
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217 it with the complete corresponding machine-readable source code, which
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218 must be distributed under the terms of Sections 1 and 2 above on a
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219 medium customarily used for software interchange.
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220
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221 If distribution of object code is made by offering access to copy
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222 from a designated place, then offering equivalent access to copy the
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223 source code from the same place satisfies the requirement to
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224 distribute the source code, even though third parties are not
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225 compelled to copy the source along with the object code.
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226
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227 5. A program that contains no derivative of any portion of the
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228 Library, but is designed to work with the Library by being compiled or
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229 linked with it, is called a "work that uses the Library". Such a
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230 work, in isolation, is not a derivative work of the Library, and
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231 therefore falls outside the scope of this License.
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232
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233 However, linking a "work that uses the Library" with the Library
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234 creates an executable that is a derivative of the Library (because it
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235 contains portions of the Library), rather than a "work that uses the
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236 library". The executable is therefore covered by this License.
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237 Section 6 states terms for distribution of such executables.
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238
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239 When a "work that uses the Library" uses material from a header file
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240 that is part of the Library, the object code for the work may be a
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241 derivative work of the Library even though the source code is not.
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242 Whether this is true is especially significant if the work can be
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243 linked without the Library, or if the work is itself a library. The
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244 threshold for this to be true is not precisely defined by law.
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245
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246 If such an object file uses only numerical parameters, data
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247 structure layouts and accessors, and small macros and small inline
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248 functions (ten lines or less in length), then the use of the object
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249 file is unrestricted, regardless of whether it is legally a derivative
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250 work. (Executables containing this object code plus portions of the
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251 Library will still fall under Section 6.)
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252
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253 Otherwise, if the work is a derivative of the Library, you may
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254 distribute the object code for the work under the terms of Section 6.
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255 Any executables containing that work also fall under Section 6,
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256 whether or not they are linked directly with the Library itself.
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257
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258 6. As an exception to the Sections above, you may also compile or
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259 link a "work that uses the Library" with the Library to produce a
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260 work containing portions of the Library, and distribute that work
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261 under terms of your choice, provided that the terms permit
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262 modification of the work for the customer's own use and reverse
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263 engineering for debugging such modifications.
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264
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265 You must give prominent notice with each copy of the work that the
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266 Library is used in it and that the Library and its use are covered by
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267 this License. You must supply a copy of this License. If the work
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268 during execution displays copyright notices, you must include the
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269 copyright notice for the Library among them, as well as a reference
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270 directing the user to the copy of this License. Also, you must do one
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271 of these things:
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272
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273 a) Accompany the work with the complete corresponding
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274 machine-readable source code for the Library including whatever
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275 changes were used in the work (which must be distributed under
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276 Sections 1 and 2 above); and, if the work is an executable linked
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277 with the Library, with the complete machine-readable "work that
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278 uses the Library", as object code and/or source code, so that the
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279 user can modify the Library and then relink to produce a modified
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280 executable containing the modified Library. (It is understood
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281 that the user who changes the contents of definitions files in the
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282 Library will not necessarily be able to recompile the application
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283 to use the modified definitions.)
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284
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285 b) Accompany the work with a written offer, valid for at
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286 least three years, to give the same user the materials
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287 specified in Subsection 6a, above, for a charge no more
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288 than the cost of performing this distribution.
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289
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290 c) If distribution of the work is made by offering access to copy
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291 from a designated place, offer equivalent access to copy the above
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292 specified materials from the same place.
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293
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294 d) Verify that the user has already received a copy of these
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295 materials or that you have already sent this user a copy.
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296
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297 For an executable, the required form of the "work that uses the
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298 Library" must include any data and utility programs needed for
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299 reproducing the executable from it. However, as a special exception,
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300 the source code distributed need not include anything that is normally
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301 distributed (in either source or binary form) with the major
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302 components (compiler, kernel, and so on) of the operating system on
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303 which the executable runs, unless that component itself accompanies
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304 the executable.
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305
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306 It may happen that this requirement contradicts the license
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307 restrictions of other proprietary libraries that do not normally
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308 accompany the operating system. Such a contradiction means you cannot
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309 use both them and the Library together in an executable that you
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310 distribute.
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311
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312 7. You may place library facilities that are a work based on the
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313 Library side-by-side in a single library together with other library
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314 facilities not covered by this License, and distribute such a combined
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315 library, provided that the separate distribution of the work based on
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316 the Library and of the other library facilities is otherwise
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317 permitted, and provided that you do these two things:
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318
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319 a) Accompany the combined library with a copy of the same work
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320 based on the Library, uncombined with any other library
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321 facilities. This must be distributed under the terms of the
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322 Sections above.
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323
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324 b) Give prominent notice with the combined library of the fact
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325 that part of it is a work based on the Library, and explaining
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326 where to find the accompanying uncombined form of the same work.
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327
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328 8. You may not copy, modify, sublicense, link with, or distribute
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329 the Library except as expressly provided under this License. Any
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330 attempt otherwise to copy, modify, sublicense, link with, or
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331 distribute the Library is void, and will automatically terminate your
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332 rights under this License. However, parties who have received copies,
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333 or rights, from you under this License will not have their licenses
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334 terminated so long as such parties remain in full compliance.
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335
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336 9. You are not required to accept this License, since you have not
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337 signed it. However, nothing else grants you permission to modify or
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338 distribute the Library or its derivative works. These actions are
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339 prohibited by law if you do not accept this License. Therefore, by
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340 modifying or distributing the Library (or any work based on the
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341 Library), you indicate your acceptance of this License to do so, and
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342 all its terms and conditions for copying, distributing or modifying
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343 the Library or works based on it.
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344
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345 10. Each time you redistribute the Library (or any work based on the
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346 Library), the recipient automatically receives a license from the
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347 original licensor to copy, distribute, link with or modify the Library
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348 subject to these terms and conditions. You may not impose any further
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349 restrictions on the recipients' exercise of the rights granted herein.
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350 You are not responsible for enforcing compliance by third parties to
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351 this License.
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352
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353 11. If, as a consequence of a court judgment or allegation of patent
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354 infringement or for any other reason (not limited to patent issues),
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355 conditions are imposed on you (whether by court order, agreement or
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356 otherwise) that contradict the conditions of this License, they do not
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357 excuse you from the conditions of this License. If you cannot
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358 distribute so as to satisfy simultaneously your obligations under this
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359 License and any other pertinent obligations, then as a consequence you
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360 may not distribute the Library at all. For example, if a patent
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361 license would not permit royalty-free redistribution of the Library by
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362 all those who receive copies directly or indirectly through you, then
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363 the only way you could satisfy both it and this License would be to
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364 refrain entirely from distribution of the Library.
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365
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366 If any portion of this section is held invalid or unenforceable under any
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367 particular circumstance, the balance of the section is intended to apply,
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368 and the section as a whole is intended to apply in other circumstances.
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369
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370 It is not the purpose of this section to induce you to infringe any
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371 patents or other property right claims or to contest validity of any
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372 such claims; this section has the sole purpose of protecting the
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373 integrity of the free software distribution system which is
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374 implemented by public license practices. Many people have made
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375 generous contributions to the wide range of software distributed
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376 through that system in reliance on consistent application of that
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377 system; it is up to the author/donor to decide if he or she is willing
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378 to distribute software through any other system and a licensee cannot
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379 impose that choice.
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380
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381 This section is intended to make thoroughly clear what is believed to
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382 be a consequence of the rest of this License.
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383
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384 12. If the distribution and/or use of the Library is restricted in
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385 certain countries either by patents or by copyrighted interfaces, the
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386 original copyright holder who places the Library under this License may add
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387 an explicit geographical distribution limitation excluding those countries,
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388 so that distribution is permitted only in or among countries not thus
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389 excluded. In such case, this License incorporates the limitation as if
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390 written in the body of this License.
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391
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392 13. The Free Software Foundation may publish revised and/or new
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393 versions of the Library General Public License from time to time.
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394 Such new versions will be similar in spirit to the present version,
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395 but may differ in detail to address new problems or concerns.
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396
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397 Each version is given a distinguishing version number. If the Library
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398 specifies a version number of this License which applies to it and
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399 "any later version", you have the option of following the terms and
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400 conditions either of that version or of any later version published by
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401 the Free Software Foundation. If the Library does not specify a
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402 license version number, you may choose any version ever published by
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403 the Free Software Foundation.
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404
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405 14. If you wish to incorporate parts of the Library into other free
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406 programs whose distribution conditions are incompatible with these,
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407 write to the author to ask for permission. For software which is
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408 copyrighted by the Free Software Foundation, write to the Free
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409 Software Foundation; we sometimes make exceptions for this. Our
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410 decision will be guided by the two goals of preserving the free status
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411 of all derivatives of our free software and of promoting the sharing
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412 and reuse of software generally.
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413
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414 NO WARRANTY
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415
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416 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
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417 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
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418 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
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419 OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
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420 KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
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421 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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422 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
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423 LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
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424 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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425
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426 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
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427 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
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428 AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
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429 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
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430 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
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431 LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
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432 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
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433 FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
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434 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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435 DAMAGES.
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436
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437 END OF TERMS AND CONDITIONS