1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
#serial 15
dnl From Jim Meyering.
dnl Check for the nanosleep function.
dnl If not found, use the supplied replacement.
dnl
# Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006 Free Software
# Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_NANOSLEEP],
[
AC_LIBSOURCES([nanosleep.c])
nanosleep_save_libs=$LIBS
# Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
AC_SEARCH_LIBS([nanosleep], [rt posix4],
[test "$ac_cv_search_nanosleep" = "none required" ||
LIB_NANOSLEEP=$ac_cv_search_nanosleep])
AC_SUBST([LIB_NANOSLEEP])
AC_CACHE_CHECK([whether nanosleep works],
jm_cv_func_nanosleep_works,
[
dnl Persuade glibc and Solaris <time.h> to declare nanosleep.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([AC_HEADER_TIME])
AC_CHECK_HEADERS_ONCE(sys/time.h)
AC_TRY_RUN([
# if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
# else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
# endif
int
main ()
{
struct timespec ts_sleep, ts_remaining;
ts_sleep.tv_sec = 0;
ts_sleep.tv_nsec = 1;
exit (nanosleep (&ts_sleep, &ts_remaining) == 0 ? 0 : 1);
}
],
jm_cv_func_nanosleep_works=yes,
jm_cv_func_nanosleep_works=no,
dnl When crosscompiling, assume the worst.
jm_cv_func_nanosleep_works=no)
])
if test $jm_cv_func_nanosleep_works = no; then
AC_LIBOBJ(nanosleep)
AC_DEFINE(nanosleep, rpl_nanosleep,
[Define to rpl_nanosleep if the replacement function should be used.])
gl_PREREQ_NANOSLEEP
fi
LIBS=$nanosleep_save_libs
])
# Prerequisites of lib/nanosleep.c.
AC_DEFUN([gl_PREREQ_NANOSLEEP],
[
AC_CHECK_FUNCS_ONCE(siginterrupt)
])
|
