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Re: IDL performance and FFTs (was: call external speed) [message #12858 is a reply to message #12854]

Thu, 17 September 1998 00:00

David Kastrup
Messages: 33
Registered: February 1998

Member

Karl Krieger <kak@ipp.mpg.de> writes:

> BTW: I very much doubt if it's against the GPL to distribute code,
> which refers to subroutine libraries under GPL as long as I do not
> include these routines or a compiled binary.

If the interface is unique to the GPL software, you are creating a
derived work, as it is of no use without the GPL binary and is
intended to link with it. The interface itself, however, is usually
not considered copyrightable. So if you distribute a lousy
implementation of fftw with the same interface along with your wrapper
routines, one would have problems suing you in court.

It then becomes the problem of the person dropping in the real fftw.
As long as *he* does not distribute the compiled form of fftw... If
he, however, distributes the stuff in an aggregation of useful
subroutines, which happens to be on the same disk as the
implementation including the lousy fftw.

Muddy waters.

--
David Kastrup Phone: +49-234-700-5570
Email: dak@neuroinformatik.ruhr-uni-bochum.de Fax: +49-234-709-4209
Institut fï¿½r Neuroinformatik, Universitï¿½tsstr. 150, 44780 Bochum, Germany

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[Message index]

		Re: IDL performance and FFTs (was: call external speed) By: stevenj on Thu, 17 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: menakkis on Thu, 17 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: David Kastrup on Thu, 17 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: Karl Krieger on Thu, 17 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: steinhh on Thu, 17 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: stevenj on Wed, 16 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: roy.hansen on Wed, 16 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: Liam Gumley on Wed, 16 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: steinhh on Wed, 16 September 1998 00:00

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