1 | License for binary copies of REDUCE downloaded from Sourceforge |
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2 | =============================================================== |
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3 | |
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4 | Redistribution and use in source and binary forms, with or without |
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5 | modification, are permitted provided that the following conditions |
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6 | are met: |
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7 | % |
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8 | * Redistributions of source code must retain the relevant |
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9 | copyright notice, this list of conditions and the following |
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10 | disclaimer. |
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11 | * Redistributions in binary form must reproduce the above |
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12 | copyright notice, this list of conditions and the following |
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13 | disclaimer in the documentation and/or other materials provided |
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14 | with the distribution. |
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15 | |
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16 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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17 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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18 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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19 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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20 | OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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21 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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22 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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26 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | |
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28 | |
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29 | ======================================================================== |
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30 | |
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31 | Commentary and further explanation |
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32 | ================================== |
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33 | |
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34 | The CSL-based binary versions of Reduce are linked with code that is subject |
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35 | to the LGPL 2.1. A copy of that license is present in the reduce.doc directory |
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36 | (which is where this file is). As of May 2016 the LGPL libraries involved |
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37 | are FOX GUI toolkit, crlibm, wxWidgets. |
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38 | The use of these (and any other LGPL code) is covered by the LGPL. |
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39 | |
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40 | LGPL states, in part: |
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41 | |
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42 | "6. As an exception to the Sections above, you may also combine or |
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43 | link a "work that uses the Library" with the Library to produce |
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44 | a work containing portions of the Library, and distribute that |
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45 | work under terms of your choice, provided that the terms permit |
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46 | modification of the work for the customer's own use and reverse |
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47 | engineering for debugging such modifications." |
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48 | |
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49 | The Reduce binaries are works containing part of the library as in the above, |
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50 | and I choose to make them available under the BSD license as at the top of |
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51 | this file. Note that one objective of the LGPL is that applications linked |
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52 | against an LGPL library can even be released subject to commercial closed |
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53 | licenses, and those could permit or prohibit further distribution at their |
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54 | whim. The BSD license should in general be seen as more open than any |
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55 | proprietary distribution, so its use should not cause worry to any (L)GPL |
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56 | enthusiast. |
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57 | |
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58 | When the complete binary archive (a .tar.bz2 or .zip file) is fetched it |
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59 | will automatically include a copy of this Reduce documentation and hence |
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60 | it will satisfy license terms as regard propogation of the conditions of |
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61 | use. |
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62 | |
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63 | To ensure that my initial distribution of the binary is valid under terms |
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64 | of LGPL 2.1 I note |
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65 | |
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66 | (a) the BSD license that I apply downstream permits modification and |
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67 | reverse engineering, so the LGPL requirement that these be allowed |
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68 | is satisfied. |
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69 | (b) This notice is intended to be "prominent notice" of the use of LGPL |
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70 | libraries and that my actions are sanctioned by the LGPL 2.1. |
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71 | (c) My intent is that the executable program will not display copyright |
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72 | notices. If other developers change that state then they have a |
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73 | responsibility to arrange to add in matching copyright notices related |
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74 | to the LGPL code. |
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75 | (d) in accordance with Sourceforge policy as well as the LGPL full source |
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76 | of all components (well beyond the "minimal source" that LGPL |
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77 | identifies) will be released on sourceforge alongside any binary |
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78 | distribution, thus LGPL (6)(d) is used to cover source distribution. |
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79 | (e) again since this is an open source project under the BSD license |
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80 | all relevant data, utility programs, build scripts and the like |
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81 | to make it possible to recompile everything on a standard system |
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82 | is naturally present. |
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83 | |
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84 | |
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85 | Observe that the consequences of all the above is that the license terms that |
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86 | apply to anybody who downloads a binary distribution from Sourceforge are |
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87 | the permissive BSD ones rather than any more restrictive (L)GPL ones. |
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88 | |
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89 | Also note that anybody who fetches source and rebuilds or relinks against |
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90 | any LGPL libraries themselves will need to ensure that they adhere to the |
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91 | license terms if they distribute the resulting binary, and they will probably |
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92 | also wish to place a source archive beside their own binaries. |
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93 | |
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94 | The Reduce builds also make use of a collection of other generously |
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95 | licensed components such as libedit, the Berkeley SoftFloat code, in the |
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96 | future there may be use of the Boehm conservative garbage collector, |
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97 | an MD5-evaluation library and other code fragments, in addition to all the |
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98 | standard libraries the come along with the operating environment. The Reduce |
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99 | developers are grateful to all the authors of these libraries, and the full |
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100 | set of Reduce sources should contain clean copies of the versions that |
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101 | we started from and full attribution. In a similar way various font files |
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102 | are also used and the proper credits should be included along with them. |
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103 | |
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104 | |
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105 | Arthur Norman May 2016 |
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106 | |
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107 | |
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