1# yield.m4 serial 2 2dnl Copyright (C) 2005-2010 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN([gl_YIELD], 8[ 9 AC_REQUIRE([gl_THREADLIB]) 10 dnl On some systems, sched_yield is in librt, rather than in libpthread. 11 YIELD_LIB= 12 if test $gl_threads_api = posix; then 13 dnl Solaris has sched_yield in librt, not in libpthread or libc. 14 AC_CHECK_LIB([rt], [sched_yield], [YIELD_LIB=-lrt], 15 [dnl Solaris 2.5.1, 2.6 has sched_yield in libposix4, not librt. 16 AC_CHECK_LIB([posix4], [sched_yield], [YIELD_LIB=-lposix4])]) 17 fi 18 AC_SUBST([YIELD_LIB]) 19]) 20