GCC?RUNTIME?LIBRARY?EXCEPTION

Version?3.1,?31?March?2009

Copyright?(C)?2009?Free?Software?Foundation,?Inc.

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.
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