-#serial 1
+#serial 18
dnl From Jim Meyering.
-dnl FIXME
+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],
[
- AC_CACHE_CHECK([whether nanosleep works],
- jm_cv_func_nanosleep_works,
- [AC_TRY_RUN([
-# include <time.h>
+ 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=$LIBS
+
+ # Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
+ # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
+ AC_SEARCH_LIBS([nanosleep], [rt posix4],
+ [test "$ac_cv_search_nanosleep" = "none required" ||
+ LIB_NANOSLEEP=$ac_cv_search_nanosleep])
+ AC_SUBST([LIB_NANOSLEEP])
+
+ AC_CACHE_CHECK([for nanosleep],
+ [gl_cv_func_nanosleep],
+ [
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[
+# 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 ? 1 : 0);
+ 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=yes)
+ ]])],
+ [gl_cv_func_nanosleep=yes],
+ [gl_cv_func_nanosleep=no])
])
- if test $jm_cv_func_nanosleep_works = no; then
- AC_SUBST(LIBOBJS)
- LIBOBJS="$LIBOBJS nanosleep.$ac_objext"
- AC_DEFINE_UNQUOTED(nanosleep, gnu_nanosleep,
- [Define to gnu_nanosleep if the replacement function should be used.])
+ 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)
])