1# signalblocking.m4 serial 12 2dnl Copyright (C) 2001-2002, 2006-2011 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7# Determine available signal blocking primitives. Three different APIs exist: 8# 1) POSIX: sigemptyset, sigaddset, sigprocmask 9# 2) SYSV: sighold, sigrelse 10# 3) BSD: sigblock, sigsetmask 11# For simplicity, here we check only for the POSIX signal blocking. 12AC_DEFUN([gl_SIGNALBLOCKING], 13[ 14 AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) 15 AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T]) 16 if test $gl_cv_type_sigset_t = yes; then 17 AC_CHECK_FUNC([sigprocmask], [gl_cv_func_sigprocmask=1]) 18 fi 19 if test -z "$gl_cv_func_sigprocmask"; then 20 HAVE_POSIX_SIGNALBLOCKING=0 21 fi 22]) 23 24# Prerequisites of lib/sigprocmask.c. 25AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:]) 26