v.19.4Build/Testing/Packaging Improvement
Xxhash.h Does Not Exist in External Lz4 Because It Is an Implementation Detail and Its Symbols Are Namespaced with Xxh_namespace Macro
xxhash.hdoes not exist in external lz4 because it is an implementation detail and its symbols are namespaced withXXH_NAMESPACEmacro. When lz4 is external, xxHash has to be external too, and the dependents have to link to it. #4495 (Orivej Desh)