document --index-version for index-pack and pack-objects

diff --git a/git-compat-util.h b/git-compat-util.h
index 139fc19108cab51eb23659868ef8600ff6b25795..bcfcb35ecf81d024147c75880428cdea370111ce 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -13,6 +13,14 @@
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 
+#ifdef __GNUC__
+#define TYPEOF(x) (__typeof__(x))
+#else
+#define TYPEOF(x)
+#endif
+
+#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+
 #if !defined(__APPLE__) && !defined(__FreeBSD__)
 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */