[Debian-med-packaging] Bug#971804: libzstd: embedded libxxhash implementation

[Gianfranco Costamagna]

Source: libzstd
Version: 1.4.5+dfsg-4
Severity: important

Hello, I see you build an embedded xxhash.c/xxhash.h version of the xxhash library already in Debian.

I tried to use the system version, but some pre-processor directives such as XXH_NAMESPACE=ZSTD_ are tricking my
efforts in crafting a patch, resulting into some undefined libraries when linking.

Please consider asking upstream to detect and support (if possible) a system library, or add it to the list
of embedded libraries in Debian

G.