# [PATCH] cache.h: avoid deprecation warnings on OS X 10.8

2 messages from 2013-05-11 to 2013-05-12. Participants: David Aguilar, Eric Sunshine.
Thread: https://gitlist.dev/t/33782

## David Aguilar, 2013-05-11 02:23

Subject: [PATCH] cache.h: avoid deprecation warnings on OS X 10.8
Message-ID: <1368239010-60894-1-git-send-email-davvid@gmail.com>
URL: https://gitlist.dev/e/1368239010-60894-1-git-send-email-davvid%40gmail.com

```
Mac OS X Mountain Lion prints warnings when building git:

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

Silence the warnings by using the Common Digest SHA-1
functions for SHA1_Init(), SHA1_Update(), and SHA1_Final().

Add a COMMON_DIGEST_SHA1 knob to the Makefile to allow
choosing this implementation and define it by default on Darwin.

Signed-off-by: David Aguilar <davvid@gmail.com>
---
This implements the suggestion from John Keeping instead
of blindly setting NO_OPENSSL on Darwin.

 Makefile | 4 ++++
 cache.h  | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/Makefile b/Makefile
index 0f931a2..ce62002 100644
--- a/Makefile
+++ b/Makefile
@@ -1054,6 +1054,7 @@ ifeq ($(uname_S),Darwin)
 			BASIC_LDFLAGS += -L/opt/local/lib
 		endif
 	endif
+	COMMON_DIGEST_SHA1 = YesPlease
 	PTHREAD_LIBS =
 endif
 
@@ -1390,6 +1391,9 @@ ifdef PPC_SHA1
 else
 	SHA1_HEADER = <openssl/sha.h>
 	EXTLIBS += $(LIB_4_CRYPTO)
+ifdef COMMON_DIGEST_SHA1
+	BASIC_CFLAGS += -DCOMMON_DIGEST_FOR_SHA1=1
+endif
 endif
 endif
 ifdef NO_PERL_MAKEMAKER
diff --git a/cache.h b/cache.h
index 94ca1ac..f137fd4 100644
--- a/cache.h
+++ b/cache.h
@@ -11,10 +11,16 @@
 #include SHA1_HEADER
 #ifndef git_SHA_CTX
 #define git_SHA_CTX	SHA_CTX
+#ifdef COMMON_DIGEST_FOR_SHA1
+#define git_SHA1_Init	CC_SHA1_Init
+#define git_SHA1_Update	CC_SHA1_Update
+#define git_SHA1_Final	CC_SHA1_Final
+#else
 #define git_SHA1_Init	SHA1_Init
 #define git_SHA1_Update	SHA1_Update
 #define git_SHA1_Final	SHA1_Final
 #endif
+#endif
 
 #include <zlib.h>
 typedef struct git_zstream {
-- 
1.8.3.rc1.44.gb387c77.dirty

```

## Eric Sunshine, 2013-05-12 17:20

Subject: Re: [PATCH] cache.h: avoid deprecation warnings on OS X 10.8
Message-ID: <CAPig+cRsBay2tobNEMTujMR4q7xs-Fbq_3V=WQaw40KWAXwdLg@mail.gmail.com>
URL: https://gitlist.dev/e/CAPig%2BcRsBay2tobNEMTujMR4q7xs-Fbq_3V%3DWQaw40KWAXwdLg%40mail.gmail.com
In-Reply-To: <1368239010-60894-1-git-send-email-davvid@gmail.com>

```
On Fri, May 10, 2013 at 10:23 PM, David Aguilar <davvid@gmail.com> wrote:
> Mac OS X Mountain Lion prints warnings when building git:
>
>         warning: 'SHA1_Init' is deprecated
>         (declared at /usr/include/openssl/sha.h:121)
>
> Silence the warnings by using the Common Digest SHA-1
> functions for SHA1_Init(), SHA1_Update(), and SHA1_Final().

On Lion, with this patch, I see diagnostics such as:

    warning: implicit declaration of function 'CC_SHA1_Init'

If I #include <CommonCrypto/CommonDigest.h>, the "implicit
declaration" warning is resolved, but a host of other warnings about
incompatible pointer types crop up.

(This is a bare Lion installation with latest XCode and "Command Line
Tools" package. No MacPorts, no Homebrew.)

> Add a COMMON_DIGEST_SHA1 knob to the Makefile to allow
> choosing this implementation and define it by default on Darwin.
>
> Signed-off-by: David Aguilar <davvid@gmail.com>
> ---
> This implements the suggestion from John Keeping instead
> of blindly setting NO_OPENSSL on Darwin.

```
