License and distrubution

Tom Watson
  • Tom Watson

    Tom Watson - 2013-12-13

    The FAQ says:
    Can I use the EXE or DLL files from 7-Zip in a Commercial Application?

    Yes, but you are required to specify in your documentation (1) that you used parts of the 7-Zip program, (2) that 7-Zip is licensed under the GNU LGPL license and (3) you must give a link to, where the source code can be found.

    But LGPL v2.1 seems to indicate in section 4:
    You may copy and distribute the Library (or a portion or derivative of it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange.

    The LGPL v2.1 seems to indicate that if I distribute 7-zip (say, an exe file) I must also distribute the source code next to it. Simply pointing to the 7-zip web site doesn't appear to be allowed.

    1) Am I reading this correctly (I'm not a lawyer)?
    2) Can the license can be modified (a codicil?) to say that the option in the FAQ is sufficient for an "unmodified" release of 7-zip?
    3) Am I paranoid (probably!)?

  • Igor Pavlov

    Igor Pavlov - 2013-12-13

    The main thing - all users must have access to source code.
    While 7-Zip site and sourceforge provide source code, it's enough to link them.
    In paranoid case you can include 3 links:
    1) to site
    2) to site
    3) to some your site, where you can provide same source code.

    Last edit: Igor Pavlov 2013-12-13

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