hash.h: move SHA-1 implementation selection into a header file

diff --git a/cache.h b/cache.h
index 61fc86e6d7199518555632a0b0b584471b9083a8..f98c95bf2af167666911e338de8c312c1cc6ce78 100644 (file)
--- 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,