ggc-page.c (init_ggc): Give better diagnostics on failure to open /dev/zero.

	* ggc-page.c (init_ggc): Give better diagnostics on failure to
	open /dev/zero.
	* toplev.c (crash_signal): Reset handling for received signal
	to SIG_DFL.

From-SVN: r67323

gcc/ChangeLog

+2003-06-01  Zack Weinberg  <zack@codesourcery.com>
+
+	* ggc-page.c (init_ggc): Give better diagnostics on failure to
+	open /dev/zero.
+	* toplev.c (crash_signal): Reset handling for received signal
+	to SIG_DFL.
+
 2003-06-02  Ben Elliston  <bje@wasabisystems.com>
 
 	* config/arm/arm.c (arm_use_dfa_pipeline_interface): Declare.

gcc/ggc-page.c

@@ -1287,7 +1287,7 @@ init_ggc ()
 #ifdef HAVE_MMAP_DEV_ZERO
   G.dev_zero_fd = open ("/dev/zero", O_RDONLY);
   if (G.dev_zero_fd == -1)
-    abort ();
+    internal_error ("open /dev/zero: %m");
 #endif
 
 #if 0

gcc/toplev.c

@@ -1758,11 +1758,13 @@ floor_log2_wide (unsigned HOST_WIDE_INT x)
 }
 
 /* Handler for fatal signals, such as SIGSEGV.  These are transformed
-   into ICE messages, which is much more user friendly.  */
+   into ICE messages, which is much more user friendly.  In case the
+   error printer crashes, reset the signal to prevent infinite recursion.  */
 
 static void
 crash_signal (int signo)
 {
+  signal (signo, SIG_DFL);
   internal_error ("%s", strsignal (signo));
 }