gnulib: m4/usleep.m4 annotate

annotate m4/usleep.m4 @ 17363:5a51fb7777a9

sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin Problem reported by Marco Atzeri in <http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>. * lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]: Simply delegate to the system <sys/select.h> in this case too. Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to be needed on Solaris either. * lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]: Simply delgate to the system <sys/time.h> in this case.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Tue, 19 Mar 2013 09:08:47 -0700
parents	e542fd46ad6f
children	344018b6e5d7

rev	line source
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	1 # usleep.m4 serial 3
17249 e542fd46ad6f maint: update all copyright year number ranges Eric Blake <eblake@redhat.com> parents: 16811 diff changeset	2 dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.
12315 8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	6
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	7 dnl This macro intentionally does not check for select or nanosleep;
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	8 dnl both of those modules can require external libraries.
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	9 AC_DEFUN([gl_FUNC_USLEEP],
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	10 [
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	11 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	12 dnl usleep was required in POSIX 2001, but dropped as obsolete in
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	13 dnl POSIX 2008; therefore, it is not always exposed in headers.
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	14 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	15 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
12315 8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	16 AC_CHECK_FUNCS_ONCE([usleep])
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	17 AC_CHECK_TYPE([useconds_t], [],
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	18 [AC_DEFINE([useconds_t], [unsigned int], [Define to an unsigned 32-bit
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	19 type if <sys/types.h> lacks this type.])])
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	20 if test $ac_cv_func_usleep = no; then
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	21 HAVE_USLEEP=0
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	22 else
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	23 dnl POSIX allows implementations to reject arguments larger than
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	24 dnl 999999, but GNU guarantees it will work.
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	25 AC_CACHE_CHECK([whether usleep allows large arguments],
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	26 [gl_cv_func_usleep_works],
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	27 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	28 #include <unistd.h>
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	29 ]], [[return !!usleep (1000000);]])],
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	30 [gl_cv_func_usleep_works=yes], [gl_cv_func_usleep_works=no],
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	31 [case "$host_os" in
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	32 # Guess yes on glibc systems.
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	33 -gnu) gl_cv_func_usleep_works="guessing yes" ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	34 # If we don't know, assume the worst.
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	35 *) gl_cv_func_usleep_works="guessing no" ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	36 esac
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	37 ])])
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	38 case "$gl_cv_func_usleep_works" in
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	39 *yes) ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	40 *)
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	41 REPLACE_USLEEP=1
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	42 ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	43 esac
12315 8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	44 fi
8cb02ee162a1 usleep: new module Eric Blake <ebb9@byu.net> parents: diff changeset	45 ])

Mercurial > gnulib

annotate m4/usleep.m4 @ 17363:5a51fb7777a9