https://perl5.git.perl.org / metaconfig.git / blame
| Commit | Line | Data |
|---|---|---|
| d8875586 MBT |
1 | ?RCS: $Id: d_uwait.U 1 2006-08-24 12:32:52Z rmanfredi $ |
| 2 | ?RCS: | |
| 3 | ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi | |
| 4 | ?RCS: | |
| 5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, | |
| 6 | ?RCS: as specified in the README file that comes with the distribution. | |
| 7 | ?RCS: You may reuse parts of this distribution only within the terms of | |
| 8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root | |
| 9 | ?RCS: of the source tree for dist 4.0. | |
| 10 | ?RCS: | |
| 11 | ?RCS: $Log: d_uwait.U,v $ | |
| 12 | ?RCS: Revision 3.0.1.1 1994/01/24 14:10:49 ram | |
| 13 | ?RCS: patch16: added knowledge about wait3() | |
| 14 | ?RCS: patch16: revised 'union wait' look-up algorithm | |
| 15 | ?RCS: patch16: fixed make dependency line accordingly | |
| 16 | ?RCS: | |
| 17 | ?RCS: Revision 3.0 1993/08/18 12:07:54 ram | |
| 18 | ?RCS: Baseline for dist 3.0 netwide release. | |
| 19 | ?RCS: | |
| 20 | ?MAKE:d_uwait d_uwait3: cat contains cppstdin cppminus +cppflags rm \ | |
| 21 | Setvar Findhdr | |
| 22 | ?MAKE: -pick add $@ %< | |
| 23 | ?S:d_uwait: | |
| 24 | ?S: This symbol conditionally defines UNION_WAIT which indicates to the C | |
| 25 | ?S: program that argument for the wait() system call should be declared as | |
| 26 | ?S: 'union wait status' instead of 'int status'. | |
| 27 | ?S:. | |
| 28 | ?S:d_uwait3: | |
| 29 | ?S: This symbol conditionally defines UNION_WAIT3 which indicates to the C | |
| 30 | ?S: program that the first argument for the wait3() system call should be | |
| 31 | ?S: declared as 'union wait status' instead of 'int status'. | |
| 32 | ?S:. | |
| 33 | ?C:UNION_WAIT: | |
| 34 | ?C: This symbol if defined indicates to the C program that the argument | |
| 35 | ?C: for the wait() system call should be declared as 'union wait status' | |
| 36 | ?C: instead of 'int status'. You probably need to include <sys/wait.h> | |
| 37 | ?C: in the former case (see I_SYSWAIT). | |
| 38 | ?C:. | |
| 39 | ?C:UNION_WAIT3: | |
| 40 | ?C: This symbol if defined indicates to the C program that the first argument | |
| 41 | ?C: for the wait3() system call should be declared as 'union wait status' | |
| 42 | ?C: instead of 'int status'. You probably need to include <sys/wait.h> | |
| 43 | ?C: in the former case (see I_SYSWAIT). It seems safe to assume that the | |
| 44 | ?C: same rule applies to the second parameter of wait4(). | |
| 45 | ?C:. | |
| 46 | ?H:#$d_uwait UNION_WAIT /**/ | |
| 47 | ?H:#$d_uwait3 UNION_WAIT3 /**/ | |
| 48 | ?H:. | |
| 49 | ?T:val2 flags f also | |
| 50 | ?LINT:set d_uwait d_uwait3 | |
| 51 | : see if union wait is available | |
| 52 | echo " " | |
| 53 | ?X: | |
| 54 | ?X: Unfortunately, we can't just grep <sys/wait.h> for "union wait" because | |
| 55 | ?X: some weird systems (did I hear HP-UX?) define union wait only when _BSD | |
| 56 | ?X: is defined. The same thing happens on OSF/1, who is pushing weirdness to | |
| 57 | ?X: its limits by requiring wait() to use (int *) but wait3() to use | |
| 58 | ?X: (union wait *), unless _BSD is defined and -lbsd is used, in which case | |
| 59 | ?X: wait() also expects (union wait *). Aaargh!!--RAM | |
| 60 | ?X: | |
| 61 | set X $cppflags | |
| 62 | shift | |
| 63 | flags='' | |
| 64 | also='' | |
| 65 | for f in $*; do | |
| 66 | case "$f" in | |
| 67 | *NO_PROTO*) ;; | |
| 68 | *) flags="$flags $f";; | |
| 69 | esac | |
| 70 | done | |
| 71 | $cat `./findhdr sys/wait.h` /dev/null | \ | |
| 72 | $cppstdin $flags $cppminus >wait.out 2>/dev/null | |
| 73 | if $contains 'union.*wait.*{' wait.out >/dev/null 2>&1 ; then | |
| 74 | echo "Looks like your <sys/wait.h> knows about 'union wait'..." >&4 | |
| 75 | val="$define" | |
| 76 | @if UNION_WAIT | |
| 77 | also='also ' | |
| 78 | if $contains 'extern.*wait[ ]*([ ]*int' wait.out >/dev/null 2>&1 | |
| 79 | then | |
| 80 | echo "But wait() seems to expect an 'int' pointer (POSIX way)." >&4 | |
| 81 | val="$undef" | |
| 82 | also='' | |
| 83 | elif $contains 'extern.*wait[ ]*([ ]*union' wait.out >/dev/null 2>&1 | |
| 84 | then | |
| 85 | echo "And indeed wait() expects an 'union wait' pointer (BSD way)." >&4 | |
| 86 | else | |
| 87 | echo "So we'll use that for wait()." >&4 | |
| 88 | fi | |
| 89 | @end | |
| 90 | @if UNION_WAIT3 || d_uwait3 | |
| 91 | val2="$define" | |
| 92 | @end | |
| 93 | @if UNION_WAIT3 | |
| 94 | if $contains 'extern.*wait3[ ]*([ ]*int' wait.out >/dev/null 2>&1 | |
| 95 | then | |
| 96 | echo "However wait3() seems to expect an 'int' pointer, weird." >&4 | |
| 97 | val2="$undef" | |
| 98 | elif $contains 'extern.*wait3[ ]*([ ]*union' wait.out >/dev/null 2>&1 | |
| 99 | then | |
| 100 | echo "And wait3() ${also}expects an 'union wait' pointer, fine." >&4 | |
| 101 | else | |
| 102 | echo "As expected, wait3() ${also}uses an 'union wait' pointer." >&4 | |
| 103 | fi | |
| 104 | @end | |
| 105 | else | |
| 106 | echo "No trace of 'union wait' in <sys/wait.h>..." >&4 | |
| 107 | val="$undef" | |
| 108 | @if UNION_WAIT && UNION_WAIT3 | |
| 109 | echo "Both wait() and wait3() will use a plain 'int' pointer then." >&4 | |
| 110 | @elsif UNION_WAIT | |
| 111 | echo "Your wait() should be happy with a plain 'int' pointer." >&4 | |
| 112 | @elsif UNION_WAIT3 | |
| 113 | echo "Your wait3() should be happy with a plain 'int' pointer." >&4 | |
| 114 | @end | |
| 115 | fi | |
| 116 | set d_uwait | |
| 117 | eval $setvar | |
| 118 | @if UNION_WAIT3 || d_uwait3 | |
| 119 | val="$val2"; set d_uwait3 | |
| 120 | eval $setvar | |
| 121 | @end | |
| 122 | $rm -f wait.out | |
| 123 |