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