Blame m4/signalblocking.m4
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# signalblocking.m4 serial 14
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dnl Copyright (C) 2001-2002, 2006-2017 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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# Determine available signal blocking primitives. Three different APIs exist:
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# 1) POSIX: sigemptyset, sigaddset, sigprocmask
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# 2) SYSV: sighold, sigrelse
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# 3) BSD: sigblock, sigsetmask
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# For simplicity, here we check only for the POSIX signal blocking.
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AC_DEFUN([gl_SIGNALBLOCKING],
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[
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AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
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if test $gl_cv_type_sigset_t = yes; then
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AC_CHECK_FUNC([sigprocmask], [gl_cv_func_sigprocmask=1])
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fi
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if test -z "$gl_cv_func_sigprocmask"; then
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HAVE_POSIX_SIGNALBLOCKING=0
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fi
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])
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# Prerequisites of lib/sigprocmask.c.
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AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:])
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