1 # signalblocking.m4 serial 14 2 dnl Copyright (C) 2001-2002, 2006-2012 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl 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. 12 AC_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. 25 AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:]) 26
