[136] | 1 | GNU LESSER GENERAL PUBLIC LICENSE
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| 2 | Version 2.1, February 1999
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| 3 |
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| 4 | Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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| 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser GPL. It also counts
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| 10 | as the successor of the GNU Library Public License, version 2, hence
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| 11 | the version number 2.1.]
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| 12 |
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| 13 | Preamble
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| 14 |
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| 15 | The licenses for most software are designed to take away your
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| 16 | freedom to share and change it. By contrast, the GNU General Public
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| 17 | Licenses are intended to guarantee your freedom to share and change
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| 18 | free software--to make sure the software is free for all its users.
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| 19 |
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| 20 | This license, the Lesser General Public License, applies to some
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| 21 | specially designated software packages--typically libraries--of the
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| 22 | Free Software Foundation and other authors who decide to use it. You
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| 23 | can use it too, but we suggest you first think carefully about whether
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| 24 | this license or the ordinary General Public License is the better
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| 25 | strategy to use in any particular case, based on the explanations below.
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| 26 |
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| 27 | When we speak of free software, we are referring to freedom of use,
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| 28 | not price. Our General Public Licenses are designed to make sure that
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| 29 | you have the freedom to distribute copies of free software (and charge
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| 30 | for this service if you wish); that you receive source code or can get
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| 31 | it if you want it; that you can change the software and use pieces of
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| 32 | it in new free programs; and that you are informed that you can do
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| 33 | 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 | distributors to deny you these rights or to ask you to surrender these
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| 37 | rights. These restrictions translate to certain responsibilities for
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| 38 | you if you distribute copies of the library or if you modify it.
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| 39 |
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| 40 | For example, if you distribute copies of the library, whether gratis
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| 41 | or for a fee, you must give the recipients all the rights that we gave
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| 42 | you. You must make sure that they, too, receive or can get the source
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| 43 | code. If you link other code with the library, you must provide
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| 44 | complete object files to the recipients, so that they can relink them
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| 45 | with the library after making changes to the library and recompiling
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| 46 | it. And you must show them these terms so they know their rights.
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| 47 |
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| 48 | We protect your rights with a two-step method: (1) we copyright the
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| 49 | library, and (2) we offer you this license, which gives you legal
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| 50 | permission to copy, distribute and/or modify the library.
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| 51 |
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| 52 | To protect each distributor, we want to make it very clear that
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| 53 | there is no warranty for the free library. Also, if the library is
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| 54 | modified by someone else and passed on, the recipients should know
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| 55 | that what they have is not the original version, so that the original
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| 56 | author's reputation will not be affected by problems that might be
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| 57 | introduced by others.
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| 58 | |
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| 59 |
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| 60 | Finally, software patents pose a constant threat to the existence of
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| 61 | any free program. We wish to make sure that a company cannot
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| 62 | effectively restrict the users of a free program by obtaining a
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| 63 | restrictive license from a patent holder. Therefore, we insist that
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| 64 | any patent license obtained for a version of the library must be
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| 65 | consistent with the full freedom of use specified in this license.
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| 66 |
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| 67 | Most GNU software, including some libraries, is covered by the
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| 68 | ordinary GNU General Public License. This license, the GNU Lesser
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| 69 | General Public License, applies to certain designated libraries, and
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| 70 | is quite different from the ordinary General Public License. We use
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| 71 | this license for certain libraries in order to permit linking those
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| 72 | libraries into non-free programs.
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| 73 |
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| 74 | When a program is linked with a library, whether statically or using
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| 75 | a shared library, the combination of the two is legally speaking a
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| 76 | combined work, a derivative of the original library. The ordinary
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| 77 | General Public License therefore permits such linking only if the
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| 78 | entire combination fits its criteria of freedom. The Lesser General
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| 79 | Public License permits more lax criteria for linking other code with
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| 80 | the library.
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| 81 |
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| 82 | We call this license the "Lesser" General Public License because it
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| 83 | does Less to protect the user's freedom than the ordinary General
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| 84 | Public License. It also provides other free software developers Less
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| 85 | of an advantage over competing non-free programs. These disadvantages
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| 86 | are the reason we use the ordinary General Public License for many
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| 87 | libraries. However, the Lesser license provides advantages in certain
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| 88 | special circumstances.
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| 89 |
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| 90 | For example, on rare occasions, there may be a special need to
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| 91 | encourage the widest possible use of a certain library, so that it becomes
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| 92 | a de-facto standard. To achieve this, non-free programs must be
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| 93 | allowed to use the library. A more frequent case is that a free
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| 94 | library does the same job as widely used non-free libraries. In this
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| 95 | case, there is little to gain by limiting the free library to free
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| 96 | software only, so we use the Lesser General Public License.
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| 97 |
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| 98 | In other cases, permission to use a particular library in non-free
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| 99 | programs enables a greater number of people to use a large body of
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| 100 | free software. For example, permission to use the GNU C Library in
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| 101 | non-free programs enables many more people to use the whole GNU
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| 102 | operating system, as well as its variant, the GNU/Linux operating
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| 103 | system.
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| 104 |
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| 105 | Although the Lesser General Public License is Less protective of the
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| 106 | users' freedom, it does ensure that the user of a program that is
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| 107 | linked with the Library has the freedom and the wherewithal to run
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| 108 | that program using a modified version of the Library.
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| 109 |
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| 110 | The precise terms and conditions for copying, distribution and
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| 111 | modification follow. Pay close attention to the difference between a
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| 112 | "work based on the library" and a "work that uses the library". The
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| 113 | former contains code derived from the library, whereas the latter must
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| 114 | be combined with the library in order to run.
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| 115 | |
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| 116 |
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| 117 | GNU LESSER GENERAL PUBLIC LICENSE
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| 118 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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| 119 |
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| 120 | 0. This License Agreement applies to any software library or other
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| 121 | program which contains a notice placed by the copyright holder or
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| 122 | other authorized party saying it may be distributed under the terms of
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| 123 | this Lesser General Public License (also called "this License").
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| 124 | Each licensee is addressed as "you".
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| 125 |
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| 126 | A "library" means a collection of software functions and/or data
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| 127 | prepared so as to be conveniently linked with application programs
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| 135 | straightforwardly into another language. (Hereinafter, translation is
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| 136 | included without limitation in the term "modification".)
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| 137 |
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| 143 |
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| 144 | Activities other than copying, distribution and modification are not
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| 146 | running a program using the Library is not restricted, and output from
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| 152 | 1. You may copy and distribute verbatim copies of the Library's
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| 154 | you conspicuously and appropriately publish on each copy an
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| 170 | a) The modified work must itself be a software library.
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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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| 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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| 183 | table, the facility still operates, and performs whatever part of
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| 184 | its purpose remains meaningful.
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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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| 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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| 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 Library,
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| 198 | distribute the same sections as part of a whole which is a work based
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| 202 | it.
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| 203 |
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| 204 | Thus, it is not the intent of this section to claim rights or contest
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| 212 | the scope of this License.
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| 213 |
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| 214 | 3. You may opt to apply the terms of the ordinary GNU General Public
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| 215 | License instead of this License to a given copy of the Library. To do
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| 216 | this, you must alter all the notices that refer to this License, so
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| 231 | 4. You may copy and distribute the Library (or a portion or
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| 241 | distribute the source code, even though third parties are not
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| 250 | However, linking a "work that uses the Library" with the Library
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| 254 | Section 6 states terms for distribution of such executables.
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| 255 |
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| 256 | When a "work that uses the Library" uses material from a header file
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| 259 | Whether this is true is especially significant if the work can be
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| 263 | If such an object file uses only numerical parameters, data
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| 265 | functions (ten lines or less in length), then the use of the object
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| 269 |
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| 270 | Otherwise, if the work is a derivative of the Library, you may
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| 271 | distribute the object code for the work under the terms of Section 6.
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| 273 | whether or not they are linked directly with the Library itself.
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| 274 | |
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| 275 |
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| 276 | 6. As an exception to the Sections above, you may also combine or
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| 281 | engineering for debugging such modifications.
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| 283 | You must give prominent notice with each copy of the work that the
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| 284 | Library is used in it and that the Library and its use are covered by
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| 285 | this License. You must supply a copy of this License. If the work
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| 286 | during execution displays copyright notices, you must include the
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| 288 | directing the user to the copy of this License. Also, you must do one
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| 289 | of these things:
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| 290 |
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| 291 | a) Accompany the work with the complete corresponding
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| 294 | Sections 1 and 2 above); and, if the work is an executable linked
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| 296 | uses the Library", as object code and/or source code, so that the
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| 299 | that the user who changes the contents of definitions files in the
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| 301 | to use the modified definitions.)
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| 302 |
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| 303 | b) Use a suitable shared library mechanism for linking with the
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| 304 | Library. A suitable mechanism is one that (1) uses at run time a
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| 306 | rather than copying library functions into the executable, and (2)
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| 308 | the user installs one, as long as the modified version is
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| 309 | interface-compatible with the version that the work was made with.
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| 310 |
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| 311 | c) Accompany the work with a written offer, valid for at
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| 313 | specified in Subsection 6a, above, for a charge no more
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| 314 | than the cost of performing this distribution.
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| 316 | d) If distribution of the work is made by offering access to copy
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| 318 | specified materials from the same place.
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| 320 | e) Verify that the user has already received a copy of these
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| 322 |
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| 323 | For an executable, the required form of the "work that uses the
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| 324 | Library" must include any data and utility programs needed for
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| 332 | It may happen that this requirement contradicts the license
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| 335 | use both them and the Library together in an executable that you
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| 336 | distribute.
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| 338 |
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| 339 | 7. You may place library facilities that are a work based on the
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| 340 | Library side-by-side in a single library together with other library
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| 341 | facilities not covered by this License, and distribute such a combined
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| 342 | library, provided that the separate distribution of the work based on
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| 343 | the Library and of the other library facilities is otherwise
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| 346 | a) Accompany the combined library with a copy of the same work
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| 351 | b) Give prominent notice with the combined library of the fact
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| 354 |
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| 355 | 8. You may not copy, modify, sublicense, link with, or distribute
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| 357 | attempt otherwise to copy, modify, sublicense, link with, or
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| 360 | or rights, from you under this License will not have their licenses
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| 361 | terminated so long as such parties remain in full compliance.
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| 362 |
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| 363 | 9. You are not required to accept this License, since you have not
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| 364 | signed it. However, nothing else grants you permission to modify or
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| 365 | distribute the Library or its derivative works. These actions are
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| 372 | 10. Each time you redistribute the Library (or any work based on the
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| 377 | You are not responsible for enforcing compliance by third parties with
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| 381 | 11. If, as a consequence of a court judgment or allegation of patent
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| 383 | conditions are imposed on you (whether by court order, agreement or
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| 391 | the only way you could satisfy both it and this License would be to
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| 392 | 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 under any
|
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| 395 | particular circumstance, the balance of the section is intended to apply,
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| 396 | and the section as a whole is intended to apply in other circumstances.
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| 397 |
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| 398 | It is not the purpose of this section to induce you to infringe any
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| 399 | patents or other property right claims or to contest validity of any
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| 400 | such claims; this section has the sole purpose of protecting the
|
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| 401 | integrity of the free software distribution system which is
|
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| 402 | implemented by public license practices. Many people have made
|
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| 403 | generous contributions to the wide range of software distributed
|
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| 404 | through that system in reliance on consistent application of that
|
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| 405 | system; it is up to the author/donor to decide if he or she is willing
|
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| 406 | to distribute software through any other system and a licensee cannot
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| 407 | impose that choice.
|
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| 408 |
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| 409 | This section is intended to make thoroughly clear what is believed to
|
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| 410 | be a consequence of the rest of this License.
|
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| 411 |
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| 412 | 12. If the distribution and/or use of the Library is restricted in
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| 413 | certain countries either by patents or by copyrighted interfaces, the
|
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| 414 | original copyright holder who places the Library under this License may add
|
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| 415 | an explicit geographical distribution limitation excluding those countries,
|
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| 416 | so that distribution is permitted only in or among countries not thus
|
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| 417 | excluded. In such case, this License incorporates the limitation as if
|
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| 418 | written in the body of this License.
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| 419 |
|
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| 420 | 13. The Free Software Foundation may publish revised and/or new
|
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| 421 | versions of the Lesser General Public License from time to time.
|
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| 422 | Such new versions will be similar in spirit to the present version,
|
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| 423 | but may differ in detail to address new problems or concerns.
|
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| 424 |
|
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| 425 | Each version is given a distinguishing version number. If the Library
|
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| 426 | specifies a version number of this License which applies to it and
|
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| 427 | "any later version", you have the option of following the terms and
|
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| 428 | conditions either of that version or of any later version published by
|
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| 429 | the Free Software Foundation. If the Library does not specify a
|
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| 430 | license version number, you may choose any version ever published by
|
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| 431 | the Free Software Foundation.
|
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| 432 | |
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| 433 |
|
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| 434 | 14. If you wish to incorporate parts of the Library into other free
|
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| 435 | programs whose distribution conditions are incompatible with these,
|
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| 436 | write to the author to ask for permission. For software which is
|
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| 437 | copyrighted by the Free Software Foundation, write to the Free
|
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| 438 | Software Foundation; we sometimes make exceptions for this. Our
|
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| 439 | decision will be guided by the two goals of preserving the free status
|
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| 440 | of all derivatives of our free software and of promoting the sharing
|
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| 441 | and reuse of software generally.
|
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| 442 |
|
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| 443 | NO WARRANTY
|
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| 444 |
|
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| 445 | 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
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| 446 | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
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| 447 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
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| 448 | OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
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| 449 | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
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| 450 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
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| 451 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
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| 452 | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
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| 453 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
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| 454 |
|
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| 455 | 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
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| 456 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
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| 457 | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
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| 458 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
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| 459 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
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| 460 | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
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| 461 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
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| 462 | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
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| 463 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
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| 464 | DAMAGES.
|
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| 465 |
|
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| 466 | END OF TERMS AND CONDITIONS
|
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| 467 | |
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| 468 |
|
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| 469 | How to Apply These Terms to Your New Libraries
|
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| 470 |
|
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| 471 | If you develop a new library, and you want it to be of the greatest
|
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| 472 | possible use to the public, we recommend making it free software that
|
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| 473 | everyone can redistribute and change. You can do so by permitting
|
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| 474 | redistribution under these terms (or, alternatively, under the terms of the
|
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| 475 | ordinary General Public License).
|
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| 476 |
|
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| 477 | To apply these terms, attach the following notices to the library. It is
|
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| 478 | safest to attach them to the start of each source file to most effectively
|
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| 479 | convey the exclusion of warranty; and each file should have at least the
|
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| 480 | "copyright" line and a pointer to where the full notice is found.
|
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| 481 |
|
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| 482 | <one line to give the library's name and a brief idea of what it does.>
|
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| 483 | Copyright (C) <year> <name of author>
|
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| 484 |
|
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| 485 | This library is free software; you can redistribute it and/or
|
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| 486 | modify it under the terms of the GNU Lesser General Public
|
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| 487 | License as published by the Free Software Foundation; either
|
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| 488 | version 2.1 of the License, or (at your option) any later version.
|
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| 489 |
|
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| 490 | This library is distributed in the hope that it will be useful,
|
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| 491 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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| 492 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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| 493 | Lesser General Public License for more details.
|
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| 494 |
|
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| 495 | You should have received a copy of the GNU Lesser General Public
|
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| 496 | License along with this library; if not, write to the Free Software
|
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| 497 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
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| 498 |
|
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| 499 | Also add information on how to contact you by electronic and paper mail.
|
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| 500 |
|
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| 501 | You should also get your employer (if you work as a programmer) or your
|
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| 502 | school, if any, to sign a "copyright disclaimer" for the library, if
|
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| 503 | necessary. Here is a sample; alter the names:
|
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| 504 |
|
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| 505 | Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
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| 506 | library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
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| 507 |
|
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| 508 | <signature of Ty Coon>, 1 April 1990
|
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| 509 | Ty Coon, President of Vice
|
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| 510 |
|
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| 511 | That's all there is to it!
|
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