From b53b0fd940382497e58a9e912f1262c2084fe534 Mon Sep 17 00:00:00 2001
From: Pádraig Brady <P@draigBrady.com>
Date: Tue, 3 Dec 2013 03:51:52 +0000
Subject: md5sum, sha*sum: use libcrypto where available

libcrypto is generally available and has well optimized
crypto hash routines particular to various systems.
For example, testing sha1sum with openssl-1.0.0j
on an i3-2310M, gives a performance boost of about 40%:

$ time sha1sum.old --tag ~/test.iso
SHA1 (/home/padraig/test.iso) = 3c27f7ed01965fd2b89e22128fd62dc51a3bef30
real    0m4.692s
user    0m4.499s
sys     0m0.162s

$ time sha1sum.new --tag ~/test.iso
SHA1 (/home/padraig/test.iso) = 3c27f7ed01965fd2b89e22128fd62dc51a3bef30
real    0m2.685s
user    0m2.512s
sys     0m0.170s

* configure.ac: By default, enable use of libcrypto if available.
* src/local.mk: Link with libcrypto.
* NEWS: Mention the md5sum and sha*sum improvements.
---
 src/local.mk | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/local.mk')

diff --git a/src/local.mk b/src/local.mk
index 1315e1103..fe80f41c1 100644
--- a/src/local.mk
+++ b/src/local.mk
@@ -293,6 +293,15 @@ src_stdbuf_LDADD += $(LIBICONV)
 src_timeout_LDADD += $(LIBICONV)
 src_truncate_LDADD += $(LIBICONV)
 
+# for libcrypto hash routines
+src_md5sum_LDADD += $(LIB_CRYPTO)
+src_sort_LDADD += $(LIB_CRYPTO)
+src_sha1sum_LDADD += $(LIB_CRYPTO)
+src_sha224sum_LDADD += $(LIB_CRYPTO)
+src_sha256sum_LDADD += $(LIB_CRYPTO)
+src_sha384sum_LDADD += $(LIB_CRYPTO)
+src_sha512sum_LDADD += $(LIB_CRYPTO)
+
 # for canon_host
 src_pinky_LDADD += $(GETADDRINFO_LIB)
 src_who_LDADD += $(GETADDRINFO_LIB)
-- 
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