Do only one call to GetVersionEx in the common case.

[pspp] / lib / unistd.in.h

diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 600f2240822595baaff5a1faeba8749ee957e08e..8a96e792b070dd88287c27d5b6cee0adb107eec2 100644 (file)
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -581,6 +581,21 @@ extern int link (const char *path1, const char *path2);
      link (path1, path2))
 #endif
 
+#if @GNULIB_LINKAT@
+/* Create a new hard link for an existing file, relative to two
+   directories.  FLAG controls whether symlinks are followed.
+   Return 0 if successful, otherwise -1 and errno set.  */
+# if !@HAVE_LINKAT@
+extern int linkat (int fd1, const char *path1, int fd2, const char *path2,
+                  int flag);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef linkat
+# define link(f1,path1,f2,path2,f)             \
+    (GL_LINK_WARNING ("linkat is unportable - " \
+                      "use gnulib module linkat for portability"), \
+     linkat (f1, path1, f2, path2,f))
+#endif
 
 #if @GNULIB_LSEEK@
 # if @REPLACE_LSEEK@