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# yield.m4 serial 2
dnl Copyright (C) 2005-2018 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_YIELD],
[
AC_REQUIRE([gl_THREADLIB])
dnl On some systems, sched_yield is in librt, rather than in libpthread.
YIELD_LIB=
if test $gl_threads_api = posix; then
dnl Solaris has sched_yield in librt, not in libpthread or libc.
AC_CHECK_LIB([rt], [sched_yield], [YIELD_LIB=-lrt],
[dnl Solaris 2.5.1, 2.6 has sched_yield in libposix4, not librt.
AC_CHECK_LIB([posix4], [sched_yield], [YIELD_LIB=-lposix4])])
fi
AC_SUBST([YIELD_LIB])
])
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