sys_select: tweak for AIX

sys_select: tweak for AIX

[Bruno Haible]

On AIX 7.1 with gcc, I'm seeing this warning:

  test-sys_select.c:32: warning: implicit declaration of function 'memset'
  test-sys_select.c:32: warning: incompatible implicit declaration of built-in function 'memset'

This should fix it.


2011-06-05  Bruno Haible  <bruno@clisp.org>

	sys_select: Ensure memset is declared also on AIX 7.
	* lib/sys_select.in.h: Include <string.h> also on AIX.
	* doc/posix-headers/sys_select.texi: Mention that <sys/select.h> is not
	self-contained also on AIX 7.1.

--- doc/posix-headers/sys_select.texi.orig	Sun Jun  5 14:17:27 2011
+++ doc/posix-headers/sys_select.texi	Sun Jun  5 14:15:26 2011
@@ -19,7 +19,7 @@
 @item
 This header file is not self-contained --- it requires @code{<string.h>}
 before @code{FD_ZERO} can be used --- on some platforms:
-Solaris 11 2010-11.
+AIX 7.1, Solaris 11 2010-11.
 @end itemize
 
 Portability problems not fixed by Gnulib:
--- lib/sys_select.in.h.orig	Sun Jun  5 14:17:27 2011
+++ lib/sys_select.in.h	Sun Jun  5 14:16:06 2011
@@ -51,10 +51,10 @@
 #  include <sys/time.h>
 # endif
 
-/* On Solaris 10, <sys/select.h> provides an FD_ZERO implementation
+/* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
    that relies on memset(), but without including <string.h>.
    But in any case avoid namespace pollution on glibc systems.  */
-# if (defined __OpenBSD__ || defined __sun || defined __osf__ || defined __BEOS__) \
+# if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
      && ! defined __GLIBC__
 #  include <string.h>
 # endif

-- 
In memoriam Eduard Lederer <http://de.wikipedia.org/wiki/Eduard_Lederer>