Implement stubs of `readlink' and `symlink' for MS-Windows.

 src/w32.c (symlink, readlink): New stub functions.
 nt/inc/unistd.h (readlink, symlink): Declare prototypes.

nt/ChangeLog

+2011-02-27  Eli Zaretskii  <eliz@gnu.org>
+
+	* inc/unistd.h (readlink, symlink): Declare prototypes.
+
 2011-02-26  Eli Zaretskii  <eliz@gnu.org>
 
 	* config.nt (nlink_t): Define.

nt/inc/unistd.h

 /* Fake unistd.h: config.h already provides most of the relevant things. */
 
+#ifndef _UNISTD_H
+#define _UNISTD_H
+
+extern ssize_t readlink (const char *, char *, size_t);
+extern int symlink (char const *, char const *);
+
+#endif	/* _UNISTD_H */
+

src/ChangeLog

+2011-02-27  Eli Zaretskii  <eliz@gnu.org>
+
+	* w32.c (symlink, readlink): New stub functions.
+
 2011-02-27  Paul Eggert  <eggert@cs.ucla.edu>
 	* scroll.c (CHECK_BOUNDS): #define only if GLYPH_DEBUG.

src/w32.c

@@ -3613,6 +3613,25 @@ utime (const char *name, struct utimbuf *times)
   return 0;
 }
 
+
+/* Symlink-related functions that always fail.  Used in fileio.c to
+   avoid #ifdef's.  */
+int
+symlink (char const *dummy1, char const *dummy2)
+{
+  errno = ENOSYS;
+  return -1;
+}
+
+ssize_t
+readlink (const char *name, char *dummy1, size_t dummy2)
+{
+  /* `access' is much faster than `stat' on MS-Windows.  */
+  if (sys_access (name, 0) == 0)
+    errno = EINVAL;
+  return -1;
+}
+
 
 /* Support for browsing other processes and their attributes.  See
    process.c for the Lisp bindings.  */