[PATCH] fix gcc 4.0 big endian sha1

From: Alex Free via GitGitGadget <gitgitgadget@gmail.com>
Date: Nov 1, 2020, 11:42 UTC
Message-ID: <pull.907.git.git.1604230936338.gitgitgadget@gmail.com>

From: alex <you@example.com>

The file sha1dc/sha1.c requires big endian to be defined by the compiler. If it is not defined, then it defaults to little endian mode, which when compiled and ran on a big endian machine results in a sha1 mismatch.

This change will allow git to correctly detect big endian on GCC 4.2 and GCC 4.0 running on PowerPC Mac OS X 10.4 and Mac OS X 10.5, resulting in a successful build that works correctly.

Signed-off-by: Alex Free <alex_free@email.com>
---
    fix gcc 4.0 big endian sha1
    
    Currently, sha1.c is compiled in little endian mode when using gcc 4.0
    on Mac OS X 10.4 PowerPC (which is big endian). This results in a build
    that always states there is a sha1 mismatch. The below patch allows big
    endian to be detected correctly using GCC 4.0 and probably older
    versions as well.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-907%2Falex-free%2Fmaster-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-907/alex-free/master-v1
Pull-Request: https://github.com/git/git/pull/907

 sha1dc/sha1.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sha1dc/sha1.c b/sha1dc/sha1.c
index dede2cbddf..4899ffcc20 100644
--- a/sha1dc/sha1.c
+++ b/sha1dc/sha1.c
@@ -43,6 +43,14 @@
    you will have to add whatever macros your tool chain defines to indicate Big-Endianness.
  */
 
+#if defined(__BIG_ENDIAN__)
+#define SHA1DC_BIGENDIAN
+#endif
+
+/*
+   Required for GCC 4.0
+*/
+
 #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
 /*
  * Should detect Big Endian under GCC since at least 4.6.0 (gcc svn

base-commit: ad27df6a5cff694add500ab8c7f97234feb4a91f

-- 
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