1 # sigaction.m4 serial 4
2 dnl Copyright (C) 2008 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # Determine if sigaction interface is present.
8 AC_DEFUN([gl_SIGACTION],
10 AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
11 AC_REPLACE_FUNCS([sigaction])
12 if test $ac_cv_func_sigaction = no ; then
14 AC_SUBST([HAVE_SIGACTION])
19 # Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
20 AC_DEFUN([gl_PREREQ_SIGACTION],
22 AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
23 AC_REQUIRE([AC_C_RESTRICT])
24 AC_REQUIRE([AC_TYPE_UID_T])
25 AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
26 AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
27 AC_CHECK_TYPES([siginfo_t], [], [], [[
30 if test $ac_cv_type_siginfo_t = no; then
32 AC_SUBST([HAVE_SIGINFO_T])
36 # Prerequisites of lib/sig-handler.h.
37 AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
39 AC_REQUIRE([AC_C_INLINE])
40 AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
41 [[#include <signal.h>]])
42 if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
43 HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
44 AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])