Merge from gnulib, porting to Tru64.

* lib/lstat.c, lib/stat.c, m4/include_next.m4, m4/nocrash.m4:
* m4/signal_h.m4, m4/time_h.m4, m4/unistd_h.m4:
Merge from gnulib.  This fixes a compilation error on Tru64 UNIX
aka OSF/1 5.1 DTK cc.  There is also some mingw stuff here that
doesn't affect Emacs.

5 files changed, 65 insertions, 11 deletions

diff --git a/m4/include_next.m4 b/m4/include_next.m4
index ebf081a1101..14a1009b5d4 100644
--- a/m4/include_next.m4
+++ b/m4/include_next.m4
@@ -1,4 +1,4 @@
-# include_next.m4 serial 20
+# include_next.m4 serial 21
 dnl Copyright (C) 2006-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -207,17 +207,34 @@ dnl until we can assume autoconf 2.64 or newer.
                  aix*) gl_absname_cpp="$ac_cpp -C" ;;
                  *)    gl_absname_cpp="$ac_cpp" ;;
                esac
+changequote(,)
+               case "$host_os" in
+                 mingw*)
+                   dnl For the sake of native Windows compilers (excluding gcc),
+                   dnl treat backslash as a directory separator, like /.
+                   dnl Actually, these compilers use a double-backslash as
+                   dnl directory separator, inside the
+                   dnl   # line "filename"
+                   dnl directives.
+                   gl_dirsep_regex='[/\\]'
+                   ;;
+                 *)
+                   gl_dirsep_regex='/'
+                   ;;
+               esac
+changequote([,])
+               gl_absolute_header_sed='\#'"${gl_dirsep_regex}"']m4_defn([gl_HEADER_NAME])[#{
+                   s#.*"\(.*'"${gl_dirsep_regex}"']m4_defn([gl_HEADER_NAME])[\)".*#\1#
+                   s#^/[^/]#//&#
+                   p
+                   q
+                 }'
                dnl eval is necessary to expand gl_absname_cpp.
                dnl Ultrix and Pyramid sh refuse to redirect output of eval,
                dnl so use subshell.
                AS_VAR_SET(gl_next_header,
                  ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-                  sed -n '\#/]m4_defn([gl_HEADER_NAME])[#{
-                    s#.*"\(.*/]m4_defn([gl_HEADER_NAME])[\)".*#\1#
-                    s#^/[^/]#//&#
-                    p
-                    q
-                  }'`'"'])
+                      sed -n "$gl_absolute_header_sed"`'"'])
           m4_if([$2], [check],
             [else
                AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>'])
diff --git a/m4/nocrash.m4 b/m4/nocrash.m4
index 0cc0d53ebf7..60aad952956 100644
--- a/m4/nocrash.m4
+++ b/m4/nocrash.m4
@@ -1,4 +1,4 @@
-# nocrash.m4 serial 2
+# nocrash.m4 serial 3
 dnl Copyright (C) 2005, 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -79,6 +79,34 @@ nocrash_init (void)
     }
   }
 }
+#elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* Avoid a crash on native Windows.  */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winerror.h>
+static LONG WINAPI
+exception_filter (EXCEPTION_POINTERS *ExceptionInfo)
+{
+  switch (ExceptionInfo->ExceptionRecord->ExceptionCode)
+    {
+    case EXCEPTION_ACCESS_VIOLATION:
+    case EXCEPTION_IN_PAGE_ERROR:
+    case EXCEPTION_STACK_OVERFLOW:
+    case EXCEPTION_GUARD_PAGE:
+    case EXCEPTION_PRIV_INSTRUCTION:
+    case EXCEPTION_ILLEGAL_INSTRUCTION:
+    case EXCEPTION_DATATYPE_MISALIGNMENT:
+    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
+    case EXCEPTION_NONCONTINUABLE_EXCEPTION:
+      exit (1);
+    }
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+static void
+nocrash_init (void)
+{
+  SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) exception_filter);
+}
 #else
 /* Avoid a crash on POSIX systems.  */
 #include <signal.h>
diff --git a/m4/signal_h.m4 b/m4/signal_h.m4
index b9536fb0e3c..c3f25386ca2 100644
--- a/m4/signal_h.m4
+++ b/m4/signal_h.m4
@@ -1,4 +1,4 @@
-# signal_h.m4 serial 16
+# signal_h.m4 serial 17
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -17,6 +17,9 @@ AC_DEFUN([gl_SIGNAL_H],
 #include <signal.h>
     ]])
 
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
   AC_REQUIRE([AC_TYPE_UID_T])
 
   dnl Persuade glibc <signal.h> to define sighandler_t.
diff --git a/m4/time_h.m4 b/m4/time_h.m4
index 615da1cfd39..6e6394fdc90 100644
--- a/m4/time_h.m4
+++ b/m4/time_h.m4
@@ -2,7 +2,7 @@
 
 # Copyright (C) 2000-2001, 2003-2007, 2009-2011 Free Software Foundation, Inc.
 
-# serial 4
+# serial 5
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -23,6 +23,9 @@ AC_DEFUN([gl_HEADER_TIME_H_BODY],
   AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
   gl_NEXT_HEADERS([time.h])
   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
 ])
 
 dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
diff --git a/m4/unistd_h.m4 b/m4/unistd_h.m4
index fb6fe077265..6483b815d60 100644
--- a/m4/unistd_h.m4
+++ b/m4/unistd_h.m4
@@ -1,4 +1,4 @@
-# unistd_h.m4 serial 56
+# unistd_h.m4 serial 57
 dnl Copyright (C) 2006-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -21,6 +21,9 @@ AC_DEFUN([gl_UNISTD_H],
   fi
   AC_SUBST([HAVE_UNISTD_H])
 
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_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 <unistd.h>