2 Commits

Author	SHA1	Message	Date
David Sterba	03f41ac508	btrfs-progs: detect PCLMUL CPU support for accelerated crc32c ... The accelerated crc32c needs to check for two CPU features, the crc32c instructions is in SSE 4.2 and 'pclmulqdq' is a separate. There's still old hardware used that does not have the PCLMUL instructions. Detect it and make it the condition. The pclmul is not supported on old compilers so also add a configure-time detection and leave the SSE 4.2 only implementation as the accelerated one if possible. Issue: #676 Signed-off-by: David Sterba <dsterba@suse.com>	2023-09-13 00:38:50 +02:00
David Sterba	e1eddbeb4c	btrfs-progs: build: reuse config/ directory for m4 macros ... Move files from m4/ to config that is also used for build and we can reduce the number of toplevel directories. Signed-off-by: David Sterba <dsterba@suse.com>	2023-05-26 21:08:17 +02:00