From f18f816cb1586e9aab3e30a7144768e0d282d305 Mon Sep 17 00:00:00 2001 From: "brian m. carlson" Date: Sat, 11 Mar 2017 22:28:18 +0000 Subject: [PATCH] hash.h: move SHA-1 implementation selection into a header file Many developers use functionality in their editors that allows for quick syntax checks, including warning about questionable constructs. This functionality allows rapid development with fewer errors. However, such functionality generally does not allow the specification of project-specific defines or command-line options. Since the SHA1_HEADER include is not defined in such a case, developers see spurious errors when using these tools. Furthermore, there are known implementations of "cc" whose '#include' is unhappy with this construct. Instead of using SHA1_HEADER, create a hash.h header and use #if and #elif to select the desired header. Have the Makefile pass an appropriate option to help the header select the right implementation to use. [jc: make BLK_SHA1 the fallback default as discussed on list, e.g. <20170314201424.vccij5z2ortq4a4o@sigill.intra.peff.net>; also remove SHA1_HEADER and SHA1_HEADER_SQ that are no longer used]. Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano Reviewed-by: Jeff King Signed-off-by: Junio C Hamano --- Makefile | 12 +++++------- cache.h | 2 +- hash.h | 14 ++++++++++++++ 3 files changed, 20 insertions(+), 8 deletions(-) create mode 100644 hash.h diff --git a/Makefile b/Makefile index 8e4081e061..25c21f08b1 100644 --- a/Makefile +++ b/Makefile @@ -1387,19 +1387,19 @@ ifdef APPLE_COMMON_CRYPTO endif ifdef BLK_SHA1 - SHA1_HEADER = "block-sha1/sha1.h" LIB_OBJS += block-sha1/sha1.o + BASIC_CFLAGS += -DSHA1_BLK else ifdef PPC_SHA1 - SHA1_HEADER = "ppc/sha1.h" LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o + BASIC_CFLAGS += -DSHA1_PPC else ifdef APPLE_COMMON_CRYPTO COMPAT_CFLAGS += -DCOMMON_DIGEST_FOR_OPENSSL - SHA1_HEADER = + BASIC_CFLAGS += -DSHA1_APPLE else - SHA1_HEADER = EXTLIBS += $(LIB_4_CRYPTO) + BASIC_CFLAGS += -DSHA1_OPENSSL endif endif endif @@ -1591,7 +1591,6 @@ endif # Shell quote (do not use $(call) to accommodate ancient setups); -SHA1_HEADER_SQ = $(subst ','\'',$(SHA1_HEADER)) ETC_GITCONFIG_SQ = $(subst ','\'',$(ETC_GITCONFIG)) ETC_GITATTRIBUTES_SQ = $(subst ','\'',$(ETC_GITATTRIBUTES)) @@ -1624,8 +1623,7 @@ PERLLIB_EXTRA_SQ = $(subst ','\'',$(PERLLIB_EXTRA)) # from the dependency list, that would make each entry appear twice. LIBS = $(filter-out %.o, $(GITLIBS)) $(EXTLIBS) -BASIC_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' \ - $(COMPAT_CFLAGS) +BASIC_CFLAGS += $(COMPAT_CFLAGS) LIB_OBJS += $(COMPAT_OBJS) # Quote for C diff --git a/cache.h b/cache.h index 61fc86e6d7..f98c95bf2a 100644 --- a/cache.h +++ b/cache.h @@ -10,8 +10,8 @@ #include "trace.h" #include "string-list.h" #include "pack-revindex.h" +#include "hash.h" -#include SHA1_HEADER #ifndef platform_SHA_CTX /* * platform's underlying implementation of SHA-1; could be OpenSSL, diff --git a/hash.h b/hash.h new file mode 100644 index 0000000000..f0d9ddd0c2 --- /dev/null +++ b/hash.h @@ -0,0 +1,14 @@ +#ifndef HASH_H +#define HASH_H + +#if defined(SHA1_PPC) +#include "ppc/sha1.h" +#elif defined(SHA1_APPLE) +#include +#elif defined(SHA1_OPENSSL) +#include +#else /* SHA1_BLK */ +#include "block-sha1/sha1.h" +#endif + +#endif -- 2.11.4.GIT