Re: libWARC | Identify external libraries required by LibWARC (#5)

[Tim Rühsen]

Tim Rühsen commented:


As @darnir says, `gzip` is pretty mandatory, `zstd` is optional and needs an 
extension of the WARC spec (everyone is free to propose a draft).

Regarding sha1: The gnulib module provides a slow but working implementation. 
So, build support for nettle, gcrypt and openssl/crypto would be very nice, as 
those libraries provide highly optimized versions of sha1. 

Alternatively (or even better) would be an API to set the hash functions 
callbacks, so that an application has full control and can override the 
built-in hash functions. That wouldn't add any dependencies to libWARC.

You'll find similar code in the Wget2 project (see `configure.ac` and 
`libwget/hashfile.c`).

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