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Re: RFA: Add GCC Runtime Library Exception to include/plugin-api.h


On Tue, Feb 2, 2016 at 1:35 PM, Cary Coutant <ccoutant@gmail.com> wrote:
>> include/plugin-api.h defines an ABI between linker and compiler,
>> which can be used to implement linker plug-in by any compilers.
>> I'd like to add GCC Runtime Library Exception to include/plugin-api.h
>> so that the linker plug-in can have non-GPL licenses.
>
> This is OK with me.
>
> -cary

Here is a patch.  OK for trunk?

Thanks.

-- 
H.J.
From 3f8f62505774116d5de233ca36f60e3f8a840516 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Tue, 2 Feb 2016 14:02:03 -0800
Subject: [PATCH] Add GCC Runtime Library Exception to plugin-api.h

	* COPYING.RUNTIME: New file.
	* plugin-api.h: Add GCC Runtime Library Exception.
---
 include/COPYING.RUNTIME | 73 +++++++++++++++++++++++++++++++++++++++++++++++++
 include/plugin-api.h    | 11 +++++++-
 2 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 include/COPYING.RUNTIME

diff --git a/include/COPYING.RUNTIME b/include/COPYING.RUNTIME
new file mode 100644
index 0000000..e1b3c69
--- /dev/null
+++ b/include/COPYING.RUNTIME
@@ -0,0 +1,73 @@
+GCC RUNTIME LIBRARY EXCEPTION
+
+Version 3.1, 31 March 2009
+
+Copyright (C) 2009 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+This GCC Runtime Library Exception ("Exception") is an additional
+permission under section 7 of the GNU General Public License, version
+3 ("GPLv3"). It applies to a given file (the "Runtime Library") that
+bears a notice placed by the copyright holder of the file stating that
+the file is governed by GPLv3 along with this Exception.
+
+When you use GCC to compile a program, GCC may combine portions of
+certain GCC header files and runtime libraries with the compiled
+program. The purpose of this Exception is to allow compilation of
+non-GPL (including proprietary) programs to use, in this way, the
+header files and runtime libraries covered by this Exception.
+
+0. Definitions.
+
+A file is an "Independent Module" if it either requires the Runtime
+Library for execution after a Compilation Process, or makes use of an
+interface provided by the Runtime Library, but is not otherwise based
+on the Runtime Library.
+
+"GCC" means a version of the GNU Compiler Collection, with or without
+modifications, governed by version 3 (or a specified later version) of
+the GNU General Public License (GPL) with the option of using any
+subsequent versions published by the FSF.
+
+"GPL-compatible Software" is software whose conditions of propagation,
+modification and use would permit combination with GCC in accord with
+the license of GCC.
+
+"Target Code" refers to output from any compiler for a real or virtual
+target processor architecture, in executable form or suitable for
+input to an assembler, loader, linker and/or execution
+phase. Notwithstanding that, Target Code does not include data in any
+format that is used as a compiler intermediate representation, or used
+for producing a compiler intermediate representation.
+
+The "Compilation Process" transforms code entirely represented in
+non-intermediate languages designed for human-written code, and/or in
+Java Virtual Machine byte code, into Target Code. Thus, for example,
+use of source code generators and preprocessors need not be considered
+part of the Compilation Process, since the Compilation Process can be
+understood as starting with the output of the generators or
+preprocessors.
+
+A Compilation Process is "Eligible" if it is done using GCC, alone or
+with other GPL-compatible software, or if it is done without using any
+work based on GCC. For example, using non-GPL-compatible Software to
+optimize any GCC intermediate representations would not qualify as an
+Eligible Compilation Process.
+
+1. Grant of Additional Permission.
+
+You have permission to propagate a work of Target Code formed by
+combining the Runtime Library with Independent Modules, even if such
+propagation would otherwise violate the terms of GPLv3, provided that
+all Target Code was generated by Eligible Compilation Processes. You
+may then convey such a combination under terms of your choice,
+consistent with the licensing of the Independent Modules.
+
+2. No Weakening of GCC Copyleft.
+
+The availability of this Exception does not imply any general
+presumption that third-party software is unaffected by the copyleft
+requirements of the license of GCC.
+
diff --git a/include/plugin-api.h b/include/plugin-api.h
index d7f9ee3..46686be 100644
--- a/include/plugin-api.h
+++ b/include/plugin-api.h
@@ -18,7 +18,16 @@
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
-   MA 02110-1301, USA.  */
+   MA 02110-1301, USA.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
 
 /* This file defines the interface for writing a linker plugin, which is
    described at < http://gcc.gnu.org/wiki/whopr/driver >.  */
-- 
2.5.0


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