-#serial 13
+#serial 18
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 Free Software Foundation, Inc.
+# 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])
+ 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)
nanosleep_save_libs=$LIBS
LIB_NANOSLEEP=$ac_cv_search_nanosleep])
AC_SUBST([LIB_NANOSLEEP])
- AC_CACHE_CHECK([whether nanosleep works],
- jm_cv_func_nanosleep_works,
+ AC_CACHE_CHECK([for nanosleep],
+ [gl_cv_func_nanosleep],
[
- AC_REQUIRE([AC_HEADER_TIME])
- AC_CHECK_HEADERS_ONCE(sys/time.h)
- AC_TRY_RUN([
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[
# if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
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);
+ return nanosleep (&ts_sleep, &ts_remaining) < 0;
}
- ],
- jm_cv_func_nanosleep_works=yes,
- jm_cv_func_nanosleep_works=no,
- dnl When crosscompiling, assume the worst.
- jm_cv_func_nanosleep_works=no)
+ ]])],
+ [gl_cv_func_nanosleep=yes],
+ [gl_cv_func_nanosleep=no])
])
- if test $jm_cv_func_nanosleep_works = no; then
+ if test $gl_cv_func_nanosleep = no; then
AC_LIBOBJ(nanosleep)
AC_DEFINE(nanosleep, rpl_nanosleep,
[Define to rpl_nanosleep if the replacement function should be used.])
# Prerequisites of lib/nanosleep.c.
AC_DEFUN([gl_PREREQ_NANOSLEEP],
[
- AC_CHECK_HEADERS_ONCE(unistd.h)
AC_CHECK_FUNCS_ONCE(siginterrupt)
+ AC_CHECK_HEADERS_ONCE(sys/select.h)
])