On Sunday, December 14, 2014 03:06:41 PM Emil Velikov wrote: > On 11/12/14 21:51, Carl Worth wrote: > > From: Kristian Høgsberg <k...@bitplanet.net> > > > > The upcoming shader cache uses the SHA-1 algorithm for cryptographic > > naming. These new mesa_sha1 functions are implemented with the nettle > > library. > > --- > > > > This patch is another in support of my upcoming shader-cache work. Thanks to > > Kritian for coding this piece. > > > > As currently written, this patch introduces a new dependency of Mesa on the > > Nettle library to implement SHA-1. I'm open to recommendations if people > > would prefer some other option. > > > > For example, the xserver can be configured to get a SHA-1 implementation > > from > > libmd, libc, CommonCrypto, CryptoAPI, libnettle, libgcrypt, libsha1, or > > openssl. > > > > I don't know if it's important to offer as many options as that, which is > > why > > I'm asking for opinions here. > > > Hi Carl, > > Can we try to avoid adding new dependencies to mesa unless absolutely > needed. Neither of the proprietary drivers does so presently, so it will > be nice to keep the trend. > > While currently the steam runtime does not include libnettle I can > envision one day that they will/might. Even with steam aside I think > that this might cause issues with gnome & others' sandboxing. > > Long story short - can we import a sha1 implementation from another > project ? It will save us the "libstdc++ style steam runtime" issues, > plus it will ease the question of what to do under Windows :) > > > Thanks > Emil
FWIW, when I hacked together a shader cache proof of concept, I imported smallsha1, which is just a pair of .cpp/.h files: https://code.google.com/p/smallsha1/ It's BSD-3-Clause - my main criteria was that it had to be permissively licensed. Having the implementation in a single file is nice as well. --Ken
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