- (dtucker) [configure.ac defines.h] Test for fd_mask, howmany and NFDBITS

rather than trying to enumerate the plaforms that don't have them.
   Based on a patch from Nathan Osman, with help from tim@.

ChangeLog

@@ -2,6 +2,9 @@
  - (dtucker) [configure.ac openbsd-compat/xcrypt.c] bz#2112: fall back to
    using openssl's DES_crpyt function on platorms that don't have a native
    one, eg Android.  Based on a patch from Nathan Osman.
+ - (dtucker) [configure.ac defines.h] Test for fd_mask, howmany and NFDBITS
+   rather than trying to enumerate the plaforms that don't have them.
+   Based on a patch from Nathan Osman, with help from tim@.
 
 20130529
   - (dtucker) [configure.ac openbsd-compat/bsd-misc.h] bz#2087: Add a null

configure.ac

@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.526 2013/06/01 20:28:04 dtucker Exp $
+# $Id: configure.ac,v 1.527 2013/06/01 21:18:48 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT([OpenSSH], [Portable], [openssh-unix-dev@mindrot.org])
-AC_REVISION($Revision: 1.526 $)
+AC_REVISION($Revision: 1.527 $)
 AC_CONFIG_SRCDIR([ssh.c])
 AC_LANG([C])
 
@@ -979,9 +979,6 @@ mips-sony-bsd|mips-sony-newsos4)
 *-*-nto-qnx*)
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([NO_X11_UNIX_SOCKETS])
-	AC_DEFINE([MISSING_NFDBITS], [1], [Define on *nto-qnx systems])
-	AC_DEFINE([MISSING_HOWMANY], [1], [Define on *nto-qnx systems])
-	AC_DEFINE([MISSING_FD_MASK], [1], [Define on *nto-qnx systems])
 	AC_DEFINE([DISABLE_LASTLOG])
 	AC_DEFINE([SSHD_ACQUIRES_CTTY])
 	AC_DEFINE([BROKEN_SHADOW_EXPIRE], [1], [QNX shadow support is broken])
@@ -1002,7 +999,6 @@ mips-sony-bsd|mips-sony-newsos4)
 
 *-*-lynxos)
         CFLAGS="$CFLAGS -D__NO_INCLUDE_WARN__"
-	AC_DEFINE([MISSING_HOWMANY])
         AC_DEFINE([BROKEN_SETVBUF], [1], [LynxOS has broken setvbuf() implementation])
         ;;
 esac
@@ -1703,6 +1699,37 @@ AC_CHECK_DECLS([offsetof], , , [
 #include <stddef.h>
 	])
 
+# extra bits for select(2)
+AC_CHECK_DECLS([howmany, NFDBITS], [], [], [[
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SYSMACROS_H
+#include <sys/sysmacros.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+	]])
+AC_CHECK_TYPES([fd_mask], [], [], [[
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+	]])
+
 AC_CHECK_FUNCS([setresuid], [
 	dnl Some platorms have setresuid that isn't implemented, test for this
 	AC_MSG_CHECKING([if setresuid seems to work])

defines.h

@@ -25,7 +25,7 @@
 #ifndef _DEFINES_H
 #define _DEFINES_H
 
-/* $Id: defines.h,v 1.171 2013/03/07 09:06:13 dtucker Exp $ */
+/* $Id: defines.h,v 1.172 2013/06/01 21:18:48 dtucker Exp $ */
 
 
 /* Constants */
@@ -171,11 +171,6 @@ enum
 # define MAP_FAILED ((void *)-1)
 #endif
 
-/* *-*-nto-qnx doesn't define this constant in the system headers */
-#ifdef MISSING_NFDBITS
-# define	NFDBITS (8 * sizeof(unsigned long))
-#endif
-
 /*
 SCO Open Server 3 has INADDR_LOOPBACK defined in rpc/rpc.h but
 including rpc/rpc.h breaks Solaris 6
@@ -355,11 +350,19 @@ struct winsize {
 };
 #endif
 
-/* *-*-nto-qnx does not define this type in the system headers */
+/* bits needed for select that may not be in the system headers */
-#ifdef MISSING_FD_MASK
+#ifndef HAVE_FD_MASK
  typedef unsigned long int	fd_mask;
 #endif
 
+#if defined(HAVE_DECL_NFDBITS) && HAVE_DECL_NFDBITS == 0
+# define	NFDBITS (8 * sizeof(unsigned long))
+#endif
+
+#if defined(HAVE_DECL_HOWMANY) && HAVE_DECL_HOWMANY == 0
+# define howmany(x,y)	(((x)+((y)-1))/(y))
+#endif
+
 /* Paths */
 
 #ifndef _PATH_BSHELL
@@ -484,11 +487,6 @@ struct winsize {
 # define __nonnull__(x)
 #endif
 
-/* *-*-nto-qnx doesn't define this macro in the system headers */
-#ifdef MISSING_HOWMANY
-# define howmany(x,y)	(((x)+((y)-1))/(y))
-#endif
-
 #ifndef OSSH_ALIGNBYTES
 #define OSSH_ALIGNBYTES	(sizeof(int) - 1)
 #endif