| # signalblocking.m4 serial 14 |
| dnl Copyright (C) 2001-2002, 2006-2012 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| # 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([gl_SIGNALBLOCKING], |
| [ |
| AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
| AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T]) |
| if test $gl_cv_type_sigset_t = yes; then |
| AC_CHECK_FUNC([sigprocmask], [gl_cv_func_sigprocmask=1]) |
| fi |
| if test -z "$gl_cv_func_sigprocmask"; then |
| HAVE_POSIX_SIGNALBLOCKING=0 |
| fi |
| ]) |
| |
| # Prerequisites of lib/sigprocmask.c. |
| AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:]) |
