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# sigaction.m4 serial 5
dnl Copyright (C) 2008, 2009, 2010 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
AC_LIBOBJ([sigaction])
gl_PREREQ_SIGACTION
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],
[
AC_REQUIRE([AC_C_INLINE])
])
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