# sigaction.m4 serial 7

dnl Copyright (C) 2008-2017 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 if sigaction interface is present.

AC_DEFUN([gl_SIGACTION],

[

  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])

  AC_CHECK_FUNCS_ONCE([sigaction])

  if test $ac_cv_func_sigaction = yes; then

    AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,

                     [[#include <signal.h>]])

    if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then

      HAVE_STRUCT_SIGACTION_SA_SIGACTION=0

    fi

  else

    HAVE_SIGACTION=0

  fi

])

# Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.

AC_DEFUN([gl_PREREQ_SIGACTION],

[

  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])

  AC_REQUIRE([AC_C_RESTRICT])

  AC_REQUIRE([AC_TYPE_UID_T])

  AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])

  AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])

  AC_CHECK_TYPES([siginfo_t], [], [], [[

#include <signal.h>

  ]])

  if test $ac_cv_type_siginfo_t = no; then

    HAVE_SIGINFO_T=0

  fi

])

# Prerequisites of lib/sig-handler.h.

AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:])