Date: Wed, 03 Oct 2012 01:31:21 +0400 From: Alexander Cherepanov <cherepan@...me.ru> To: john-dev@...ts.openwall.com Subject: Re: GPL license is not free at all On 2012-10-01 23:50, Milen Rangelov wrote: > By the way, Debian distribute unrar in both binary and source form, under > "non-free". It also has 7z package which is able to unpack rar using unrar > code is _not_ under the non-free section. rar support for 7z is in a separate package called p7zip-rar. It *is* in non-free section. Note however that all talks about non-free unrar concern only RAR3. Unpacking support for RAR2 is available under GPL -- http://unrarlib.org/ & http://home.gna.org/unrar/ . I didn't brought it up before because I doubt RAR2 support in john is very interesting but I could be wrong. Anyway keep it in mind while checking 7z in Debian etc. > Moreover, I'm afraid that if we were to follow strictly We have no choice. > that GPL madness, > we should stop developing GPU code at all, because we link to the > proprietary OpenCL library anyway. There seems to be two main approaches to this. First one is to say that a program wrote against an open standard, not a particular library. Second one is to invoke a special exception in GPL available for such cases: | However, as a special exception, the source code distributed need not | include anything that is normally distributed (in either source or | binary form) with the major components (compiler, kernel, and so on) | of the operating system on which the executable runs, unless that | component itself accompanies the executable. It's not completely clear how reliable these approaches but I don't know about OpenCL enough to judge it myself. Anyway I hope OpenCL library is not included in john bundles -- that would be a problem. Switching to a free toolchain would also be a good thing. Isn't LLVM support for OpenCL (say, https://bitbucket.org/gnarf/axtor/ ) already sufficient for this? -- Alexander Cherepanov
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