mark functions with const and pure attributes

[gnulib.git] / lib / freadahead.h

diff --git a/lib/freadahead.h b/lib/freadahead.h
index af03b89..0ddb826 100644 (file)
--- a/lib/freadahead.h
+++ b/lib/freadahead.h
@@ -31,7 +31,7 @@ extern "C" {
 
    STREAM must not be wide-character oriented.  */
 
-extern size_t freadahead (FILE *stream);
+extern size_t freadahead (FILE *stream) _GL_ATTRIBUTE_PURE;
 
 #ifdef __cplusplus
 }