-# signal_h.m4 serial 2
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# 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_ABSOLUTE_HEADER([signal.h])
- ABSOLUTE_SIGNAL_H=\"$gl_cv_absolute_signal_h\"
- AC_SUBST([ABSOLUTE_SIGNAL_H])
+ 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],
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])
])