Eliminate 'ISO C forbids an empty translation unit' GCC pedantic warning

"extern int GC_quiet" is added to suppress compiler warning.

* extra/msvc_dbg.c [_M_AMD64 || !_MSC_VER] (GC_quiet): Declare external
variable.

diff --git a/extra/msvc_dbg.c b/extra/msvc_dbg.c
index 4862a59..f0eef2f 100644 (file)
--- a/extra/msvc_dbg.c
+++ b/extra/msvc_dbg.c
@@ -377,4 +377,9 @@ char** backtrace_symbols(void*const* addresses, int count)
   return symbols;
 }
 
-#endif /* !_M_AMD64 */
+#else
+
+  extern int GC_quiet;
+        /* ANSI C does not allow translation units to be empty. */
+
+#endif /* _M_AMD64 */