-# Note that you need some new glibc (at least >2.2.4) for this, and it will
-# BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely randomly
-# break unless your underlying filesystem supports those sub-second times
-# (my ext3 doesn't).
+# Define PPC_SHA1 environment variable when running make to make use of
+# a bundled SHA1 routine optimized for PowerPC.
+
+
+# Define COLLISION_CHECK below if you believe that SHA1's
+# 1461501637330902918203684832716283019655932542976 hashes do not give you
+# sufficient guarantee that no collisions between objects will ever happen.
+
+# DEFINES += -DCOLLISION_CHECK
+
+# Define USE_NSEC below if you want git to care about sub-second file mtimes
+# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
+# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
+# randomly break unless your underlying filesystem supports those sub-second
+# times (my ext3 doesn't).
+
+# DEFINES += -DUSE_NSEC
+
+# Define USE_STDEV below if you want git to care about the underlying device
+# change being considered an inode change from the update-cache perspective.
+
+# DEFINES += -DUSE_STDEV
+