X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fdirent.in.h;h=4822d6b2c402f5b80b16414ffe276ddfb038a91e;hb=cd56634a4a8179fd5a4419fbb3e27211b042ab1c;hp=808b3608565136d3afed9dc927decc1fa6bf8156;hpb=80a029602f5b2707ca8d2487843ecb9e0df74a6a;p=gnulib.git

diff --git a/lib/dirent.in.h b/lib/dirent.in.h
index 808b36085..4822d6b2c 100644
--- a/lib/dirent.in.h
+++ b/lib/dirent.in.h
@@ -1,5 +1,5 @@
 /* A GNU-like <dirent.h>.
-   Copyright (C) 2006-2012 Free Software Foundation, Inc.
+   Copyright (C) 2006-2014 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -55,6 +55,14 @@ typedef struct gl_directory DIR;
 # endif
 #endif
 
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The attribute __pure__ was added in gcc 2.96.  */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE /* empty */
+#endif
+
 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 
 /* The definition of _GL_ARG_NONNULL is copied here.  */
@@ -229,6 +237,7 @@ _GL_WARN_ON_USE (scandir, "scandir is unportable - "
 # if !@HAVE_ALPHASORT@
 _GL_FUNCDECL_SYS (alphasort, int,
                   (const struct dirent **, const struct dirent **)
+                  _GL_ATTRIBUTE_PURE
                   _GL_ARG_NONNULL ((1, 2)));
 # endif
 /* Need to cast, because on glibc systems, the parameters are