dist-3.0 is dead and gone. Mention actual state of affairs

[metaconfig.git] / dist-3.0at70b / mcon / U / d_uwait.U

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-?RCS: $Id: d_uwait.U,v 3.0.1.1 1994/01/24 14:10:49 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: $Log: d_uwait.U,v $
-?RCS: Revision 3.0.1.1  1994/01/24  14:10:49  ram
-?RCS: patch16: added knowledge about wait3()
-?RCS: patch16: revised 'union wait' look-up algorithm
-?RCS: patch16: fixed make dependency line accordingly
-?RCS:
-?RCS: Revision 3.0  1993/08/18  12:07:54  ram
-?RCS: Baseline for dist 3.0 netwide release.
-?RCS:
-?MAKE:d_uwait d_uwait3: cat contains cppstdin cppminus +cppflags rm \
-       Setvar Findhdr
-?MAKE: -pick add $@ %<
-?S:d_uwait:
-?S:    This symbol conditionally defines UNION_WAIT which indicates to the C
-?S:    program that argument for the wait() system call should be declared as
-?S:    'union wait status' instead of 'int status'.
-?S:.
-?S:d_uwait3:
-?S:    This symbol conditionally defines UNION_WAIT3 which indicates to the C
-?S:    program that the first argument for the wait3() system call should be
-?S:    declared as 'union wait status' instead of 'int status'.
-?S:.
-?C:UNION_WAIT:
-?C:    This symbol if defined indicates to the C program that the argument
-?C:    for the wait() system call should be declared as 'union wait status'
-?C:    instead of 'int status'. You probably need to include <sys/wait.h>
-?C:    in the former case (see I_SYSWAIT).
-?C:.
-?C:UNION_WAIT3:
-?C:    This symbol if defined indicates to the C program that the first argument
-?C:    for the wait3() system call should be declared as 'union wait status'
-?C:    instead of 'int status'. You probably need to include <sys/wait.h>
-?C:    in the former case (see I_SYSWAIT). It seems safe to assume that the
-?C:    same rule applies to the second parameter of wait4().
-?C:.
-?H:#$d_uwait UNION_WAIT                /**/
-?H:#$d_uwait3 UNION_WAIT3      /**/
-?H:.
-?T:val2 flags f also
-?LINT:set d_uwait d_uwait3
-: see if union wait is available
-echo " "
-?X:
-?X: Unfortunately, we can't just grep <sys/wait.h> for "union wait" because
-?X: some weird systems (did I hear HP-UX?) define union wait only when _BSD
-?X: is defined. The same thing happens on OSF/1, who is pushing weirdness to
-?X: its limits by requiring wait() to use (int *) but wait3() to use
-?X: (union wait *), unless _BSD is defined and -lbsd is used, in which case
-?X: wait() also expects (union wait *). Aaargh!!--RAM
-?X:
-set X $cppflags
-shift
-flags=''
-also=''
-for f in $*; do
-       case "$f" in
-       *NO_PROTO*) ;;
-       *) flags="$flags $f";;
-       esac
-done
-$cat `./findhdr sys/wait.h` /dev/null | \
-       $cppstdin $flags $cppminus >wait.out 2>/dev/null
-if $contains 'union.*wait.*{' wait.out >/dev/null 2>&1 ; then
-       echo "Looks like your <sys/wait.h> knows about 'union wait'..." >&4
-       val="$define"
-@if UNION_WAIT
-       also='also '
-       if $contains 'extern.*wait[     ]*([    ]*int' wait.out >/dev/null 2>&1
-       then
-               echo "But wait() seems to expect an 'int' pointer (POSIX way)." >&4
-               val="$undef"
-               also=''
-       elif $contains 'extern.*wait[   ]*([    ]*union' wait.out >/dev/null 2>&1
-       then
-               echo "And indeed wait() expects an 'union wait' pointer (BSD way)." >&4
-       else
-               echo "So we'll use that for wait()." >&4
-       fi
-@end
-@if UNION_WAIT3 || d_uwait3
-       val2="$define"
-@end
-@if UNION_WAIT3
-       if $contains 'extern.*wait3[    ]*([    ]*int' wait.out >/dev/null 2>&1
-       then
-               echo "However wait3() seems to expect an 'int' pointer, weird." >&4
-               val2="$undef"
-       elif $contains 'extern.*wait3[  ]*([    ]*union' wait.out >/dev/null 2>&1
-       then
-               echo "And wait3() ${also}expects an 'union wait' pointer, fine." >&4
-       else
-               echo "As expected, wait3() ${also}uses an 'union wait' pointer." >&4
-       fi
-@end
-else
-       echo "No trace of 'union wait' in <sys/wait.h>..." >&4
-       val="$undef"
-@if UNION_WAIT && UNION_WAIT3
-       echo "Both wait() and wait3() will use a plain 'int' pointer then." >&4
-@elsif UNION_WAIT
-       echo "Your wait() should be happy with a plain 'int' pointer." >&4
-@elsif UNION_WAIT3
-       echo "Your wait3() should be happy with a plain 'int' pointer." >&4
-@end
-fi
-set d_uwait
-eval $setvar
-@if UNION_WAIT3 || d_uwait3
-val="$val2"; set d_uwait3
-eval $setvar
-@end
-$rm -f wait.out
-