nanosleep: work around cygwin bug

[gnulib.git] / m4 / signal_h.m4

diff --git a/m4/signal_h.m4 b/m4/signal_h.m4
index c9b40ca..e69befd 100644 (file)
--- a/m4/signal_h.m4
+++ b/m4/signal_h.m4
@@ -1,5 +1,5 @@
-# signal_h.m4 serial 2
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# signal_h.m4 serial 7
+dnl Copyright (C) 2007, 2008, 2009 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.
@@ -7,9 +7,13 @@ 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_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
@@ -21,8 +25,16 @@ 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])
 ])