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# signal_h.m4 serial 9
dnl Copyright (C) 2007, 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.
AC_DEFUN([gl_SIGNAL_H],
[
AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
gl_CHECK_NEXT_HEADERS([signal.h])
# AIX declares sig_atomic_t to already include volatile, and C89 compilers
# then choke on 'volatile sig_atomic_t'. C99 requires that it compile.
AC_CHECK_TYPE([volatile sig_atomic_t], [],
[HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
#include <signal.h>
]])
AC_REQUIRE([AC_TYPE_UID_T])
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[#include <signal.h>
]], [sigaction sigaddset sigdelset sigemptyset sigfillset sigismember
sigpending sigprocmask])
])
AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
])
AC_DEFUN([gl_SIGNAL_H_DEFAULTS],
[
GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE])
GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK])
GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING])
HAVE_SIGSET_T=1; AC_SUBST([HAVE_SIGSET_T])
HAVE_SIGINFO_T=1; AC_SUBST([HAVE_SIGINFO_T])
HAVE_SIGACTION=1; AC_SUBST([HAVE_SIGACTION])
HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])
HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T])
])
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