-#serial 7
+#serial 18
dnl From Jim Meyering.
dnl Check for the nanosleep function.
dnl If not found, use the supplied replacement.
dnl
-AC_DEFUN(jm_FUNC_NANOSLEEP,
+# 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],
[
+ 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=$LIBS
# Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
- AC_SEARCH_LIBS(nanosleep, [rt posix4], [LIB_NANOSLEEP=$ac_cv_search_nanosleep])
- AC_SUBST(LIB_NANOSLEEP)
+ 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,
+ AC_CACHE_CHECK([for nanosleep],
+ [gl_cv_func_nanosleep],
[
- AC_REQUIRE([AC_HEADER_TIME])
- 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
- AC_LIBOBJ([nanosleep])
- AC_DEFINE_UNQUOTED(nanosleep, rpl_nanosleep,
+ if test $gl_cv_func_nanosleep = no; then
+ AC_LIBOBJ(nanosleep)
+ AC_DEFINE(nanosleep, rpl_nanosleep,
[Define to rpl_nanosleep if the replacement function should be used.])
+ gl_PREREQ_NANOSLEEP
fi
LIBS=$nanosleep_save_libs
])
+
+# Prerequisites of lib/nanosleep.c.
+AC_DEFUN([gl_PREREQ_NANOSLEEP],
+[
+ AC_CHECK_FUNCS_ONCE(siginterrupt)
+ AC_CHECK_HEADERS_ONCE(sys/select.h)
+])