Merge branch 'dm/port2zos'

z/OS port

* dm/port2zos:
  compat/bswap.h: detect endianness from XL C compiler macros
  Makefile: reorder linker flags in the git executable rule
  git-compat-util.h: support variadic macros with the XL C compiler

Makefile

@@ -1610,8 +1610,8 @@ git.sp git.s git.o: EXTRA_CPPFLAGS = \
 	'-DGIT_INFO_PATH="$(infodir_relative_SQ)"'
 
 git$X: git.o GIT-LDFLAGS $(BUILTIN_OBJS) $(GITLIBS)
-	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ git.o \
-		$(BUILTIN_OBJS) $(ALL_LDFLAGS) $(LIBS)
+	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) git.o \
+		$(BUILTIN_OBJS) $(LIBS)
 
 help.sp help.s help.o: common-cmds.h
 

compat/bswap.h

@@ -122,6 +122,10 @@ static inline uint64_t git_bswap64(uint64_t x)
 #  define GIT_BYTE_ORDER GIT_BIG_ENDIAN
 # elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
 #  define GIT_BYTE_ORDER GIT_LITTLE_ENDIAN
+# elif defined(__THW_BIG_ENDIAN__) && !defined(__THW_LITTLE_ENDIAN__)
+#  define GIT_BYTE_ORDER GIT_BIG_ENDIAN
+# elif defined(__THW_LITTLE_ENDIAN__) && !defined(__THW_BIG_ENDIAN__)
+#  define GIT_BYTE_ORDER GIT_LITTLE_ENDIAN
 # else
 #  error "Cannot determine endianness"
 # endif

git-compat-util.h

@@ -778,7 +778,7 @@ void git_qsort(void *base, size_t nmemb, size_t size,
 #endif
 #endif
 
-#if defined(__GNUC__) || (_MSC_VER >= 1400)
+#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
 #define HAVE_VARIADIC_MACROS 1
 #endif