-# sigaction.m4 serial 2
-dnl Copyright (C) 2008 Free Software Foundation, Inc.
+# sigaction.m4 serial 6
+dnl Copyright (C) 2008-2011 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],
[
- dnl Due to autoconf conventions, we can't tell if HAVE_SIGACTION
- dnl means we have the type or means we have the function. We assume
- dnl that all implementations either have both or neither.
- AC_REPLACE_FUNCS([sigaction])
- if test $ac_cv_func_sigaction = no ; then
+ 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_SUBST([HAVE_SIGACTION])
- gl_PREREQ_SIGACTION
fi
])
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
- AC_SUBST([HAVE_SIGINFO_T])
fi
- gl_PREREQ_SIG_HANDLER_H
+])
+
+# Prerequisites of lib/sig-handler.h.
+AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
+[
+ AC_REQUIRE([AC_C_INLINE])
])