[PATCH v7 2/3] cache.h: eliminate SHA-1 deprecation warnings on Mac OS X

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From: David Aguilar <davvid@xxxxxxxxx>

As of Mac OS X 10.7, Apple deprecated all OpenSSL functions due to
OpenSSL ABI instability, thus leading to build diagnostics such as:

	warning: 'SHA1_Init' is deprecated
	(declared at /usr/include/openssl/sha.h:121)

Silence the warnings by using Apple's CommonCrypto SHA-1 replacement
functions for SHA1_Init(), SHA1_Update(), and SHA1_Final().

COMMON_DIGEST_FOR_OPENSSL is defined to instruct
<CommonCrypto/CommonDigest.h> to provide compatibility macros
associating OpenSSL SHA-1 functions with their CommonCrypto
counterparts.

[es: reworded commit message]

Signed-off-by: David Aguilar <davvid@xxxxxxxxx>
Signed-off-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index 2178c2c..7a03fe9 100644
--- a/Makefile
+++ b/Makefile
@@ -1398,10 +1398,16 @@ ifdef PPC_SHA1
 	LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
 	LIB_H += ppc/sha1.h
 else
+ifdef APPLE_COMMON_CRYPTO
+	COMPAT_CFLAGS += -DCOMMON_DIGEST_FOR_OPENSSL
+	SHA1_HEADER = <CommonCrypto/CommonDigest.h>
+else
 	SHA1_HEADER = <openssl/sha.h>
 	EXTLIBS += $(LIB_4_CRYPTO)
 endif
 endif
+endif
+
 ifdef NO_PERL_MAKEMAKER
 	export NO_PERL_MAKEMAKER
 endif
-- 
1.8.2.3

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