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manual.pdf?no=81225&fw=1&pid=14505
moreau1996 - 2013-10-05
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The reason we have a separate public license for some libraries is that they blurthe distinction we usually make between modifying or adding to a program andsimply using it. Linking a program with a library, without changing the library, is insome sense simply using the library, and is analogous to running a utility program orapplication program. However, in a textual and legal sense, the linked executable isa combined work, a derivative of the original library, and the ordinary General PublicLicense treats it as such.Because of this blurred distinction, using the ordinary GeneralPublic License for libraries did not effectively promote softwaresharing, because most developers did not use the libraries. Weconcluded that weaker conditions might promote sharing better.However, unrestricted linking of non-free programs would deprive the users ofthose programs of all benefit from the free status of the libraries themselves. 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