v1.3.4
added __has_attribute() define for non-clang compilers
Merge pull request #1067 from facebook/targetLength
fixed legacy test case
fixed zbufftest
bumped version number to v1.3.4
fixed a bunch of headers after license change (#825)
fixed legacy/zstd_v* with older gcc version, by guarding builtin_* like in other files
makes it possible to compile libzstd in single-thread mode without zstdmt_compress.c (#819)
[decompress] Support BMI2
Update README.md
updated pkg config file
removed limit ZSTD_TARGETLENGTH_MAX