# 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
])