#serial 13 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. # 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, [ AC_REQUIRE([AC_HEADER_TIME]) AC_CHECK_HEADERS_ONCE(sys/time.h) AC_TRY_RUN([ # if TIME_WITH_SYS_TIME # include # include # else # if HAVE_SYS_TIME_H # include # else # include # 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_HEADERS_ONCE(unistd.h) AC_CHECK_FUNCS_ONCE(siginterrupt) ])