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1 GCC RUNTIME LIBRARY EXCEPTION
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2
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3 Version 3.1, 31 March 2009
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4
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5 Copyright (C) 2009 Free Software Foundation, Inc. <http://fsf.org/>
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6
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7 Everyone is permitted to copy and distribute verbatim copies of this
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8 license document, but changing it is not allowed.
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9
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10 This GCC Runtime Library Exception ("Exception") is an additional
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11 permission under section 7 of the GNU General Public License, version
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12 3 ("GPLv3"). It applies to a given file (the "Runtime Library") that
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13 bears a notice placed by the copyright holder of the file stating that
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14 the file is governed by GPLv3 along with this Exception.
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15
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16 When you use GCC to compile a program, GCC may combine portions of
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17 certain GCC header files and runtime libraries with the compiled
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18 program. The purpose of this Exception is to allow compilation of
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19 non-GPL (including proprietary) programs to use, in this way, the
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20 header files and runtime libraries covered by this Exception.
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21
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22 0. Definitions.
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23
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24 A file is an "Independent Module" if it either requires the Runtime
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25 Library for execution after a Compilation Process, or makes use of an
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26 interface provided by the Runtime Library, but is not otherwise based
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27 on the Runtime Library.
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28
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29 "GCC" means a version of the GNU Compiler Collection, with or without
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30 modifications, governed by version 3 (or a specified later version) of
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31 the GNU General Public License (GPL) with the option of using any
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32 subsequent versions published by the FSF.
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33
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34 "GPL-compatible Software" is software whose conditions of propagation,
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35 modification and use would permit combination with GCC in accord with
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36 the license of GCC.
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37
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38 "Target Code" refers to output from any compiler for a real or virtual
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39 target processor architecture, in executable form or suitable for
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40 input to an assembler, loader, linker and/or execution
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41 phase. Notwithstanding that, Target Code does not include data in any
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42 format that is used as a compiler intermediate representation, or used
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43 for producing a compiler intermediate representation.
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44
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45 The "Compilation Process" transforms code entirely represented in
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46 non-intermediate languages designed for human-written code, and/or in
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47 Java Virtual Machine byte code, into Target Code. Thus, for example,
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48 use of source code generators and preprocessors need not be considered
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49 part of the Compilation Process, since the Compilation Process can be
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50 understood as starting with the output of the generators or
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51 preprocessors.
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52
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53 A Compilation Process is "Eligible" if it is done using GCC, alone or
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54 with other GPL-compatible software, or if it is done without using any
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55 work based on GCC. For example, using non-GPL-compatible Software to
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56 optimize any GCC intermediate representations would not qualify as an
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57 Eligible Compilation Process.
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58
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59 1. Grant of Additional Permission.
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60
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61 You have permission to propagate a work of Target Code formed by
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62 combining the Runtime Library with Independent Modules, even if such
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63 propagation would otherwise violate the terms of GPLv3, provided that
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64 all Target Code was generated by Eligible Compilation Processes. You
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65 may then convey such a combination under terms of your choice,
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66 consistent with the licensing of the Independent Modules.
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67
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68 2. No Weakening of GCC Copyleft.
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69
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70 The availability of this Exception does not imply any general
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71 presumption that third-party software is unaffected by the copyleft
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72 requirements of the license of GCC.
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73
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