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# yield.m4 serial 2
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dnl Copyright (C) 2005-2019 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_YIELD],
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[
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AC_REQUIRE([gl_THREADLIB])
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dnl On some systems, sched_yield is in librt, rather than in libpthread.
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YIELD_LIB=
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if test $gl_threads_api = posix; then
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dnl Solaris has sched_yield in librt, not in libpthread or libc.
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AC_CHECK_LIB([rt], [sched_yield], [YIELD_LIB=-lrt],
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[dnl Solaris 2.5.1, 2.6 has sched_yield in libposix4, not librt.
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AC_CHECK_LIB([posix4], [sched_yield], [YIELD_LIB=-lposix4])])
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fi
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AC_SUBST([YIELD_LIB])
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])
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