Igor, your work on 21.02 is brilliant!! Once I finally discovered your peculiar makefile compilation system (../../../../cmpl_clang_arm64.mak, etc.), I successfully compiled 7z, 7za, 7zz, and 7zr with HARDWARE CRC support on my arm64 iOS jailbroken devices! For instance my iPhone 6S boosted benchmark decompression from 50MB/sec to 88MB/sec!! I really notice this difference when packing and unpacking large source archives etc. Since I compile directly on my iOS device using clang 10.00 with the github...
Please consider a more standardized make/build structure. Having to use make -f ../../../../cmpl_clang_arm64.mak is really bizarre and I wasted hours of time trying to compile in typical methods until finally seeing this SourceForge page where you describe the ../../../../(makefile) method. I have never seen a project use this system. Or at the very least, please consider adding some type of README or BUILD_INSTRUCTIONS note in the Alone7z, Alone7z2 and makefile folders so people like me will stumble...
p7zip was abandoned around 7zip 16.00 but it contained proper man pages for 7z.1, 7za,1, etc. It would be wonderful if 7zip current release (21.03) contained these type of man pages for those of us using terminal unix-based systems. Thank you.