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+?RCS: $Id: selecttype.U,v 3.0.1.3 1997/02/28 16:20:09 ram Exp $
+?RCS:
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic Licence,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic Licence; a copy of which may be found at the root
+?RCS: of the source tree for dist 3.0.
+?RCS:
+?RCS: Original Author: Andy Dougherty <doughera@lafcol.lafayette.edu>
+?RCS:
+?RCS: $Log: selecttype.U,v $
+?RCS: Revision 3.0.1.3 1997/02/28 16:20:09 ram
+?RCS: patch61: always include <sys/select.h> when available for test
+?RCS:
+?RCS: Revision 3.0.1.2 1995/07/25 14:14:06 ram
+?RCS: patch56: removed harmful spaces in assignment
+?RCS:
+?RCS: Revision 3.0.1.1 1994/06/20 07:06:31 ram
+?RCS: patch30: created by ADO
+?RCS:
+?MAKE:selecttype: cat +cc +ccflags rm Oldconfig Myread \
+ d_fd_set d_select d_socket i_systime i_sysselct
+?MAKE: -pick add $@ %<
+?S:selecttype:
+?S: This variable holds the type used for the 2nd, 3rd, and 4th
+?S: arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
+?S: is defined, and 'int *' otherwise. This is only useful if you
+?S: have select(), naturally.
+?S:.
+?C:Select_fd_set_t:
+?C: This symbol holds the type used for the 2nd, 3rd, and 4th
+?C: arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
+?C: is defined, and 'int *' otherwise. This is only useful if you
+?C: have select(), of course.
+?C:.
+?H:#define Select_fd_set_t $selecttype /**/
+?H:.
+?T:xxx yyy
+: check for type of arguments to select. This will only really
+: work if the system supports prototypes and provides one for
+: select.
+case "$d_select" in
+$define)
+ : Make initial guess
+ case "$selecttype" in
+ ''|' ')
+ case "$d_fd_set" in
+ $define) xxx='fd_set *' ;;
+ *) xxx='int *' ;;
+ esac
+ ;;
+ *) xxx="$selecttype"
+ ;;
+ esac
+ : backup guess
+ case "$xxx" in
+ 'fd_set *') yyy='int *' ;;
+ 'int *') yyy='fd_set *' ;;
+ esac
+
+ $cat <<EOM
+
+Checking to see what type of arguments are expected by select().
+EOM
+ $cat >try.c <<EOCP
+#$i_systime I_SYS_TIME
+#$i_sysselct I_SYS_SELECT
+#$d_socket HAS_SOCKET
+#include <sys/types.h>
+#ifdef HAS_SOCKET
+#include <sys/socket.h> /* Might include <sys/bsdtypes.h> */
+#endif
+#ifdef I_SYS_TIME
+#include <sys/time.h>
+#endif
+#ifdef I_SYS_SELECT
+#include <sys/select.h>
+#endif
+main()
+{
+ int width;
+ Select_fd_set_t readfds;
+ Select_fd_set_t writefds;
+ Select_fd_set_t exceptfds;
+ struct timeval timeout;
+ select(width, readfds, writefds, exceptfds, &timeout);
+ exit(0);
+}
+EOCP
+ if $cc $ccflags -c -DSelect_fd_set_t="$xxx" try.c >/dev/null 2>&1 ; then
+ selecttype="$xxx"
+ echo "Your system uses $xxx for the arguments to select." >&4
+ elif $cc $ccflags -c -DSelect_fd_set_t="$yyy" try.c >/dev/null 2>&1 ; then
+ selecttype="$yyy"
+ echo "Your system uses $yyy for the arguments to select." >&4
+ else
+ rp='What is the type for the 2nd, 3rd, and 4th arguments to select?'
+ dflt="$xxx"
+ . ./myread
+ selecttype="$ans"
+ fi
+ $rm -f try.[co]
+ ;;
+*) selecttype='int *'
+ ;;
+esac
+