From: Michael Tokarev <mjt@tls.msk.ru>
Subject: do not #include ansidecl.h from sha1.h, use system headers

In 3.2.5 version of mdadm, new sha1 implementation has been included
which tries to include ansidecl.h header which is internal to some
other project.  But this #include isn't really necessary, since this
implementation does not actually use any defines from ansidecl.h.  So
just remove the #include, instead of adding a new external dependency.

References: http://www.spinics.net/lists/raid/msg38859.html

While at it, unconditionally include system headers like limits.h and
stdint.h, since on a Linux system these headers are available, and
these contains definitive information about real system types than
any guesses.

--- a/sha1.h
+++ b/sha1.h
@@ -22,7 +22,7 @@
 
 #include <stdio.h>
 
-#if defined HAVE_LIMITS_H || _LIBC
+#if 1 /* defined HAVE_LIMITS_H || _LIBC */
 # include <limits.h>
 #endif
 
@@ -33,9 +33,9 @@
    the resulting executable.  Locally running cross-compiled executables
    is usually not possible.  */
 
-#ifdef _LIBC
-# include <sys/types.h>
-typedef u_int32_t sha1_uint32;
+#if 1 /* def _LIBC */
+# include <stdint.h>
+typedef uint32_t sha1_uint32;
 typedef uintptr_t sha1_uintptr;
 #else
 #  define INT_MAX_32_BITS 2147483647