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