memdisk: use char array for external symbols

Use "extern const char foo[];" for an external symbol rather than
"extern void" (gcc 4.5 fix.)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/memdisk/setup.c b/memdisk/setup.c
index 3f69cd3..4315189 100644 (file)
--- a/memdisk/setup.c
+++ b/memdisk/setup.c
@@ -119,7 +119,7 @@ static const char *getcmditem(const char *what)
  */
 #define UNZIP_ALIGN 512
 
-extern void _end;              /* Symbol signalling end of data */
+extern const char _end[];              /* Symbol signalling end of data */
 
 void unzip_if_needed(uint32_t * where_p, uint32_t * size_p)
 {
@@ -171,8 +171,8 @@ void unzip_if_needed(uint32_t * where_p, uint32_t * size_p)
                        ? 0xFFFFFFFF : (uint32_t) ranges[i + 1].start);
 
            /* Make sure we don't overwrite ourselves */
-           if (startrange < (uint32_t) & _end)
-               startrange = (uint32_t) & _end;
+           if (startrange < (uint32_t) _end)
+               startrange = (uint32_t) _end;
 
            /* Allow for alignment */
            startrange =