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1# sigaction.m4 serial 7
2dnl Copyright (C) 2008-2012 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 if sigaction interface is present.
8AC_DEFUN([gl_SIGACTION],
9[
10  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
11  AC_CHECK_FUNCS_ONCE([sigaction])
12  if test $ac_cv_func_sigaction = yes; then
13    AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
14                     [[#include <signal.h>]])
15    if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
16      HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
17    fi
18  else
19    HAVE_SIGACTION=0
20  fi
21])
22
23# Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
24AC_DEFUN([gl_PREREQ_SIGACTION],
25[
26  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
27  AC_REQUIRE([AC_C_RESTRICT])
28  AC_REQUIRE([AC_TYPE_UID_T])
29  AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
30  AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
31  AC_CHECK_TYPES([siginfo_t], [], [], [[
32#include <signal.h>
33  ]])
34  if test $ac_cv_type_siginfo_t = no; then
35    HAVE_SIGINFO_T=0
36  fi
37])
38
39# Prerequisites of lib/sig-handler.h.
40AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:])
41