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Code Issues Releases Wiki Activity

Bjorn Reese helped me update the license section

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Daniel Stenberg 2000-08-23 07:27:00 +00:00
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Updated: August 17, 2000 (http://curl.haxx.se/docs/faq.shtml)
Updated: August 22, 2000 (http://curl.haxx.se/docs/faq.shtml)
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6. License Issues
6.1 I have a GPL program, can I use the libcurl library?
6.2 I have a closed-source program, can I use the libcurl library?
6.3 I have a program that uses LGPL libraries, can I use libcurl?
6.4 Can I modify curl/libcurl for my program and keep the changes secret?
6.5 Can you please change the curl/libcurl license to XXXX?
6.3 I have a BSD licensed program, can I use the libcurl library?
6.4 I have a program that uses LGPL libraries, can I use libcurl?
6.5 Can I modify curl/libcurl for my program and keep the changes secret?
6.6 Can you please change the curl/libcurl license to XXXX?
==============================================================================
@ -95,6 +96,10 @@ FAQ
Curl is not a PHP tool, even though it works perfectly well when used from
or with PHP.
Curl is not a single-OS program. Curl exists, compiles, builds and runs
under a long range of operating systems, including all modern Unixes,
Windows, Amiga, BeOS, OS/2, OS X, QNX etc.
1.4 When will you make curl do XXXX ?
I love suggestions of what to change in order to make curl and libcurl
@ -384,20 +389,40 @@ FAQ
Curl and libcurl are released under the MPL, the Mozilla Public License. To
get a really good answer to this or other licensing questions, you should
study the MPL license and the license you are about to use and check for
clashes yourself. This is a brief summary for a few cases for which we get
questions:
clashes yourself. This is a brief summary for the cases we get the most
questions. (Parts of this section was enhanced by Bjorn Reese.)
6.1. I have a GPL program, can I use the libcurl library?
No, you can't distribute your program as a binary and you cannot
distribute the (lib)curl code with your code. GPL'd software requires all
parts of the final executable to be licensed under GPL or a license that
"does impose further restrictions". (One could argue about which license
that acutally imposes the restrictions, but that'll be left for you to
ponder about.) MPL is not compatible with GPL.
No, unfortunately you cannot distribute the (lib)curl code with your code.
According to both the Free Software Foundation and the Mozilla
Organization, MPL and GPL are not compatible, because GPL requires of
other licenses that they do "not impose any further restrictions on the
recipients' exercise of the rights granted herein" [GPL paragraph 6] (One
could argue about which license that actually imposes restrictions, but
that'll be left for you to ponder about.)
However, nothing prevents you from distributing your program separately
from curl and libcurl and request that the user gets it separately.
However, you have two alternative options:
1) Nothing prevents you from distributing your program separately from
curl and libcurl, and request that the user receives it separately.
The incompability issues between MPL and GPL only applies to the
distribution.
2) Add the following exception to your distribution (you must have the
consent of all the copyright holders of the source code in your
project in order to do this)
As a special exception, you have permission to link this program
with the curl library and distribute executables, as long as you
follow the requirements of the GNU GPL in regard to all of the
software in the executable aside from curl.
This exception must be added to your GPL covered source code files
immediately after the notification mentioned in the appendix of GPL.
The wording was originally suggested by the Free Software Foundation
in relationship with the Qt library. We have changed the wording to
apply to curl.
6.2. I have a closed-source program, can I use the libcurl library?
@ -405,21 +430,27 @@ FAQ
library. If you end up doing changes to the library, only those changes
must be made available, not the ones to your program.
6.3. I have a program that uses LGPL libraries, can I use libcurl?
6.3. I have a BSD licensed program, can I use the libcurl library?
Yes, libcurl does not put any restrictions on the program that uses the
library. If you end up doing changes to the library, only those changes
must be made available, not the ones to your program.
6.4. I have a program that uses LGPL libraries, can I use libcurl?
Yes you can. LGPL libraries don't spread to other libraries the same way
GPL ones do.
However, when you read paragraph (3) of the LGPL license, you'll see that
anyone - at will - may at any time convert that LGPL program into GPL. And
GPL programs can't be distributed together, neither with (lib)curl source
code and not as a binary.
GPL programs can't be distributed together with MPL programs, neither with
(lib)curl source code and not as a binary.
6.4. Can I modify curl/libcurl for my program and keep the changes secret?
6.5. Can I modify curl/libcurl for my program and keep the changes secret?
No, you're not allowed to do that.
6.5. Can you please change the curl/libcurl license to XXXX?
6.6. Can you please change the curl/libcurl license to XXXX?
No. We carefully picked this license years ago and a large amount of
people have contributed with source code knowing that this is the license