remove unnecessary errno declaration

The errno variable/macro is part of ISO C.

diff --git a/lib/sfio/sfhdr.h b/lib/sfio/sfhdr.h
index 2d8809049e90c9ba8bf7b2da70101fdeeb35ade1..c024837149dd3d2cc150815b6a8cc5afde66e19c 100644 (file)
--- a/lib/sfio/sfhdr.h
+++ b/lib/sfio/sfhdr.h
@@ -644,10 +644,6 @@ extern "C" {
     extern char *_sfcvt(void *, int, int *, int *, int);
     extern char **_sfgetpath(char *);
 
-#ifndef errno
-    extern int errno;
-#endif
-
 #ifdef _WIN32
 #undef SF_ERROR
 #include <io.h>