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* ChangeLog.txt
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* src/rtl/itemseri.c
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92 lines
4.7 KiB
HTML
92 lines
4.7 KiB
HTML
<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>What is the Harbour exception?</title>
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</head>
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<body text="#000000" bgcolor="#ffffff">
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<a href="harbour.html"><em>Frequently Asked Questions about Harbour</em></a>
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<b>:</b> <a href="harbour6.html"><em>About Harbour</em></a>
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<b>:</b> <em>What is the Harbour exception?</em><br />
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<b>Previous:</b> <a href="harbour16.html"><em>Why was the GPL chosen as the licence for Harbour?</em></a><br />
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<b>Next:</b> <a href="harbour18.html"><em>So why don't you use the LGPL?</em></a>
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<hr noshade>
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<h2><a name="17"></a>2.11. What is the Harbour exception?<a name="HarbourException"></a></h2>
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<p>There is one small wrinkle regarding the use of the GPL as the licence for
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Harbour. Harbour comes in a number of parts, these can best be described as
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the compiler (including pre-processor), the virtual machine and the run-time
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library. The GPL dictates that anyone distributing binary versions of GPLd
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code must make an offer of providing the source and that the code linked
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against the GPLd code must also fall under the GPL. Failure to do so is a
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breach of licence.</p>
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<p>In Harbour terms this means different things depending on which portion of
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Harbour you are considering. The compiler itself can live under the GPL, it
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isn't part of the run-time and so poses no problem. This isn't true for the
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<a href="http://harbour-project.svn.sourceforge.net/svnroot/harbour-project/trunk/harbour/src/vm/">HVM</a> and
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<a href="http://harbour-project.svn.sourceforge.net/svnroot/harbour-project/trunk/harbour/src/rtl/">RTL</a> because they get linked into your application and so would
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require that your code be distributed under a compatible licence. While the
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Harbour developers would like to see you develop
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<a href="harbour13.html#FreeSoftware">free software</a> they have decided to let you make this choice.</p>
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<p>To solve this problem the developers have employed the "Harbour
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Exception". This idea comes from the GPL exception used by <a href="http://www.gnu.org/software/guile/guile.html">guile</a>. In effect,
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the exception states that you must observe the GPL except when the code in
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question is being used as the HVM and RTL of an application compiled with
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Harbour.</p>
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<p>The wording of the exception currently reads:
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<blockquote>
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The exception is that, if you link the Harbour libraries with other
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files to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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Your use of that executable is in no way restricted on account of
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linking the Harbour library code into it.
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</blockquote>
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<blockquote>
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License.
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</blockquote>
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<blockquote>
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This exception applies only to the code released by the Harbour
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Project under the name Harbour. If you copy code from other
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Harbour Project or Free Software Foundation releases into a copy of
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Harbour, as the General Public License permits, the exception does
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not apply to the code that you add in this way. To avoid misleading
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anyone as to the status of such modified files, you must delete
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this exception notice from them.
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</blockquote>
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<blockquote>
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If you write modifications of your own for Harbour, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice.
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</blockquote>
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Please note that the original wording of the exception was based on an
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earlier version of the guile exception. That version of the exception was
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less verbose and less clear. The wording of that version read:
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<blockquote>
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The exception is that if you link the Harbour Runtime Library (HRL) and/or
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the Harbour Virtual Machine (HVM) with other files to produce an executable,
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this does not by itself cause the resulting executable to be covered by the
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GNU General Public License. Your use of that executable is in no way
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restricted on account of linking the RTL and/or HVM code into it.
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</blockquote>
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The Harbour sources are being converted over to the new exception as each
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copyright holder makes the change. The intention is that every item of
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source that uses the Harbour exception will clearly use the more verbose
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version.</p>
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<hr noshade>
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<a href="harbour.html"><em>Frequently Asked Questions about Harbour</em></a>
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<b>:</b> <a href="harbour6.html"><em>About Harbour</em></a>
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<b>:</b> <em>What is the Harbour exception?</em><br />
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<b>Previous:</b> <a href="harbour16.html"><em>Why was the GPL chosen as the licence for Harbour?</em></a><br />
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<b>Next:</b> <a href="harbour18.html"><em>So why don't you use the LGPL?</em></a>
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</body>
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</html>
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