# signalblocking.m4 serial 1 (gettext-0.11) dnl Copyright (C) 2001-2002 Free Software Foundation, Inc. dnl This file is free software, distributed under the terms of the GNU dnl General Public License. As a special exception to the GNU General dnl Public License, this file may be distributed as part of a program dnl that contains a configuration script generated by Autoconf, under dnl the same distribution terms as the rest of that program. # Determine available signal blocking primitives. Three different APIs exist: # 1) POSIX: sigemptyset, sigaddset, sigprocmask # 2) SYSV: sighold, sigrelse # 3) BSD: sigblock, sigsetmask # For simplicity, here we check only for the POSIX signal blocking. AC_DEFUN([gt_SIGNALBLOCKING], [ signals_not_posix= AC_EGREP_HEADER(sigset_t, signal.h, , signals_not_posix=1) if test -z "$signals_not_posix"; then AC_CHECK_FUNC(sigprocmask, AC_DEFINE(HAVE_POSIX_SIGNALBLOCKING, 1, [Define to 1 if you have the sigset_t type and the sigprocmask function.])) fi ])