libbb/sha256: optional x86 hardware accelerated hashing

64 bit:
function                                             old     new   delta
sha256_process_block64_shaNI                           -     730    +730
.rodata                                           108314  108586    +272
sha256_begin                                          31      83     +52
------------------------------------------------------------------------------
(add/remove: 5/1 grow/shrink: 2/0 up/down: 1055/-1)          Total: 1054 bytes

32 bit:
function                                             old     new   delta
sha256_process_block64_shaNI                           -     747    +747
.rodata                                           104318  104590    +272
sha256_begin                                          29      84     +55
------------------------------------------------------------------------------
(add/remove: 5/1 grow/shrink: 2/0 up/down: 1075/-1)          Total: 1074 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src
index b9d34de8e..653025e56 100644
--- a/libbb/Kbuild.src
+++ b/libbb/Kbuild.src
@@ -59,6 +59,8 @@ lib-y += hash_md5_sha.o
 lib-y += hash_md5_sha_x86-64.o
 lib-y += hash_md5_sha_x86-64_shaNI.o
 lib-y += hash_md5_sha_x86-32_shaNI.o
+lib-y += hash_md5_sha256_x86-64_shaNI.o
+lib-y += hash_md5_sha256_x86-32_shaNI.o
 # Alternative (disabled) MD5 implementation
 #lib-y += hash_md5prime.o
 lib-y += messages.o