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# signalblocking.m4 serial 1 (gettext-0.11)
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dnl Copyright (C) 2001-2002 Free Software Foundation, Inc.
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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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([gt_SIGNALBLOCKING],
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AC_EGREP_HEADER(sigset_t, signal.h, , signals_not_posix=1)
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if test -z "$signals_not_posix"; then
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AC_CHECK_FUNC(sigprocmask,
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AC_DEFINE(HAVE_POSIX_SIGNALBLOCKING, 1,
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[Define to 1 if you have the sigset_t type and the sigprocmask function.]))