octave-lojdl/gnulib-hg: m4/poll.m4 annotate

annotate m4/poll.m4 @ 7908:d41d48e822b4

* lib/poll.c: Include sys/time.h and time.h unconditionally, since we now assume the sys_time module. * m4/poll.m4 (gl_PREREQ_POLL): Don't require AC_HEADER_TIME or check for sys/time.h; no longer needed. * modules/poll (Depends-on): Depend on sys_time.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Sat, 20 Jan 2007 08:32:33 +0000
parents	8eedfb060b79
children	f6cba5a556ce

rev	line source
7908 d41d48e822b4 * lib/poll.c: Include sys/time.h and time.h unconditionally, Paul Eggert <eggert@cs.ucla.edu> parents: 7382 diff changeset	1 # poll.m4 serial 7
d41d48e822b4 * lib/poll.c: Include sys/time.h and time.h unconditionally, Paul Eggert <eggert@cs.ucla.edu> parents: 7382 diff changeset	2 dnl Copyright (c) 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
5611 87c42e194f4a Use an all-permissive copyright notice, recommended by RMS. Paul Eggert <eggert@cs.ucla.edu> parents: 4384 diff changeset	3 dnl This file is free software; the Free Software Foundation
87c42e194f4a Use an all-permissive copyright notice, recommended by RMS. Paul Eggert <eggert@cs.ucla.edu> parents: 4384 diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
87c42e194f4a Use an all-permissive copyright notice, recommended by RMS. Paul Eggert <eggert@cs.ucla.edu> parents: 4384 diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
4242 eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 AC_DEFUN([gl_FUNC_POLL],
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	8 [
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	9 AC_CHECK_HEADERS(poll.h)
4384 4bf5f9b5190a Make .h file creation more reliable. Bruno Haible <bruno@clisp.org> parents: 4242 diff changeset	10 if test "$ac_cv_header_poll_h" = no; then
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	11 gl_cv_func_poll=no
4384 4bf5f9b5190a Make .h file creation more reliable. Bruno Haible <bruno@clisp.org> parents: 4242 diff changeset	12 else
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	13 AC_CHECK_FUNC(poll,
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	14 [# Check whether poll() works on special files (like /dev/null) and
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	15 # and ttys (like /dev/tty). On MacOS X 10.4.0 and AIX 5.3, it doesn't.
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	16 AC_TRY_RUN([
5989 c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	17 #include <fcntl.h>
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	18 #include <poll.h>
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	19 int main()
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	20 {
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	21 struct pollfd ufd;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	22 /* Try /dev/null for reading. */
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	23 ufd.fd = open ("/dev/null", O_RDONLY);
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	24 if (ufd.fd < 0)
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	25 /* If /dev/null does not exist, it's not MacOS X nor AIX. */
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	26 return 0;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	27 ufd.events = POLLIN;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	28 ufd.revents = 0;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	29 if (!(poll (&ufd, 1, 0) == 1 && ufd.revents == POLLIN))
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	30 return 1;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	31 /* Try /dev/null for writing. */
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	32 ufd.fd = open ("/dev/null", O_WRONLY);
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	33 if (ufd.fd < 0)
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	34 /* If /dev/null does not exist, it's not MacOS X nor AIX. */
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	35 return 0;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	36 ufd.events = POLLOUT;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	37 ufd.revents = 0;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	38 if (!(poll (&ufd, 1, 0) == 1 && ufd.revents == POLLOUT))
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	39 return 1;
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	40 /* Trying /dev/tty may be too environment dependent. */
5989 c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	41 return 0;
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	42 }],
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	43 [gl_cv_func_poll=yes],
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	44 [gl_cv_func_poll=no],
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	45 [# When cross-compiling, assume that poll() works everywhere except on
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	46 # MacOS X or AIX, regardless of its version.
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	47 AC_EGREP_CPP([MacOSX], [
6748 427cd89c6d7b AIX 5.3 also has a broken poll(), reported Ralf Wildenhues. Bruno Haible <bruno@clisp.org> parents: 6679 diff changeset	48 #if (defined(__APPLE__) && defined(__MACH__)) \|\| defined(_AIX)
427cd89c6d7b AIX 5.3 also has a broken poll(), reported Ralf Wildenhues. Bruno Haible <bruno@clisp.org> parents: 6679 diff changeset	49 This is MacOSX or AIX
5989 c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	50 #endif
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	51 ], [gl_cv_func_poll=no], [gl_cv_func_poll=yes])])])
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	52 fi
5989 c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	53 if test $gl_cv_func_poll = yes; then
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	54 AC_DEFINE([HAVE_POLL], 1,
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	55 [Define to 1 if you have the 'poll' function and it works.])
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	56 POLL_H=
912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	57 else
5989 c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	58 AC_LIBOBJ(poll)
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	59 AC_DEFINE(poll, rpl_poll,
c0415917431f Don't use poll() on MacOS X 10.4. Bruno Haible <bruno@clisp.org> parents: 5611 diff changeset	60 [Define to poll if the replacement function should be used.])
4242 eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	61 gl_PREREQ_POLL
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	62 POLL_H=poll.h
4242 eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	63 fi
6749 912476e213eb Rearrange code. Bruno Haible <bruno@clisp.org> parents: 6748 diff changeset	64 AC_SUBST([POLL_H])
4242 eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	65 ])
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	66
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	67 # Prerequisites of lib/poll.c.
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	68 AC_DEFUN([gl_PREREQ_POLL],
eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	69 [
7908 d41d48e822b4 * lib/poll.c: Include sys/time.h and time.h unconditionally, Paul Eggert <eggert@cs.ucla.edu> parents: 7382 diff changeset	70 AC_CHECK_HEADERS_ONCE(sys/ioctl.h sys/filio.h)
4242 eec6ba9ed532 New module poll, from Paolo Bonzini <bonzini@gnu.org>. Bruno Haible <bruno@clisp.org> parents: diff changeset	71 ])

Mercurial > hg > octave-lojdl > gnulib-hg

annotate m4/poll.m4 @ 7908:d41d48e822b4