@@ -513,7 +513,15 @@ include shared.mak
#
# === SHA-256 backend ===
#
-# Define BLK_SHA256 to use the built-in SHA-256 routines.
+# ==== Default SHA-256 backend ====
+#
+# If no *_SHA256 backend is picked we'll fall fall back on using the
+# default.
+#
+# The default SHA-256 backend is shipped with Git. No flag is required
+# to enable it. To select it don't define any other *_SHA256 flag.
+#
+# ==== Other SHA-256 implementations ====
#
# Define NETTLE_SHA256 to use the SHA-256 routines in libnettle.
#
Since 27dc04c5450 (sha256: add an SHA-256 implementation using libgcrypt, 2018-11-14) we've claimed to support a BLK_SHA256 flag, but there's no such SHA-256 backend. Instead we fall back on adding "sha256/block/sha256.o" to "LIB_OBJS" and adding "-DSHA256_BLK" to BASIC_CFLAGS. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> --- Makefile | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)