natSystem.cc (arraycopy): Use bcopy if memmove is not available.

1999-07-31  Alexandre Oliva  <oliva@dcc.unicamp.br>

	* java/lang/natSystem.cc (arraycopy): Use bcopy if memmove is not
	available.  Don't cast memmove args to (void*).
	* configure.in: Do not abort if memmove is not available.

From-SVN: r28360

libjava/ChangeLog

+1999-07-31  Alexandre Oliva  <oliva@dcc.unicamp.br>
+
+	* java/lang/natSystem.cc (arraycopy): Use bcopy if memmove is not
+	available.  Don't cast memmove args to (void*).
+	* configure.in: Do not abort if memmove is not available.
+
 1999-07-22  Bryce McKinlay  <bryce@albatross.co.nz>
 
 	* java/lang/natString.cc (substring): optimize where substring is

libjava/configure.in

@@ -342,12 +342,7 @@ else
       AC_MSG_ERROR([no function found to get the time])
    fi
 
-   # We require memmove.
-   memmove_found=no
-   AC_CHECK_FUNCS(memmove, memmove_found=yes)
-   if test "$memmove_found" = no; then
-      AC_MSG_ERROR([memmove is required])
-   fi
+   AC_CHECK_FUNCS(memmove)
 
    # We require memcpy.
    memcpy_found=no

libjava/java/lang/natSystem.cc

@@ -171,9 +171,14 @@ java::lang::System::arraycopy (jobject src, jint src_offset,
 	dst_elts = (char *) elements ((jdoubleArray) dst);
       dst_elts += size * dst_offset;
 
+#if HAVE_MEMMOVE
       // We don't bother trying memcpy.  It can't be worth the cost of
       // the check.
-      memmove ((void *) dst_elts, (void *) src_elts, count * size);
+      // Don't cast to (void*), as memmove may expect (char*)
+      memmove (dst_elts, src_elts, count * size);
+#else
+      bcopy (src_elts, dst_elts, count * size);
+#endif
     }
   else
     {