1GCC RUNTIME LIBRARY EXCEPTION 2 3Version 3.1, 31 March 2009 4 5Copyright (C) 2009 Free Software Foundation, Inc. <http://fsf.org/> 6 7Everyone is permitted to copy and distribute verbatim copies of this 8license document, but changing it is not allowed. 9 10This GCC Runtime Library Exception ("Exception") is an additional 11permission under section 7 of the GNU General Public License, version 123 ("GPLv3"). It applies to a given file (the "Runtime Library") that 13bears a notice placed by the copyright holder of the file stating that 14the file is governed by GPLv3 along with this Exception. 15 16When you use GCC to compile a program, GCC may combine portions of 17certain GCC header files and runtime libraries with the compiled 18program. The purpose of this Exception is to allow compilation of 19non-GPL (including proprietary) programs to use, in this way, the 20header files and runtime libraries covered by this Exception. 21 220. Definitions. 23 24A file is an "Independent Module" if it either requires the Runtime 25Library for execution after a Compilation Process, or makes use of an 26interface provided by the Runtime Library, but is not otherwise based 27on the Runtime Library. 28 29"GCC" means a version of the GNU Compiler Collection, with or without 30modifications, governed by version 3 (or a specified later version) of 31the GNU General Public License (GPL) with the option of using any 32subsequent versions published by the FSF. 33 34"GPL-compatible Software" is software whose conditions of propagation, 35modification and use would permit combination with GCC in accord with 36the license of GCC. 37 38"Target Code" refers to output from any compiler for a real or virtual 39target processor architecture, in executable form or suitable for 40input to an assembler, loader, linker and/or execution 41phase. Notwithstanding that, Target Code does not include data in any 42format that is used as a compiler intermediate representation, or used 43for producing a compiler intermediate representation. 44 45The "Compilation Process" transforms code entirely represented in 46non-intermediate languages designed for human-written code, and/or in 47Java Virtual Machine byte code, into Target Code. Thus, for example, 48use of source code generators and preprocessors need not be considered 49part of the Compilation Process, since the Compilation Process can be 50understood as starting with the output of the generators or 51preprocessors. 52 53A Compilation Process is "Eligible" if it is done using GCC, alone or 54with other GPL-compatible software, or if it is done without using any 55work based on GCC. For example, using non-GPL-compatible Software to 56optimize any GCC intermediate representations would not qualify as an 57Eligible Compilation Process. 58 591. Grant of Additional Permission. 60 61You have permission to propagate a work of Target Code formed by 62combining the Runtime Library with Independent Modules, even if such 63propagation would otherwise violate the terms of GPLv3, provided that 64all Target Code was generated by Eligible Compilation Processes. You 65may then convey such a combination under terms of your choice, 66consistent with the licensing of the Independent Modules. 67 682. No Weakening of GCC Copyleft. 69 70The availability of this Exception does not imply any general 71presumption that third-party software is unaffected by the copyleft 72requirements of the license of GCC. 73 74