OTP-8412 Fixed numerous compiler warnings generated by gcc 4.4.1 and

          tile-cc 2.0.1.78377 when compiling the runtime system.

3 files changed, 25 insertions, 22 deletions

diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c
index 169d4579a2..5cca33d7eb 100644
--- a/erts/emulator/sys/common/erl_poll.c
+++ b/erts/emulator/sys/common/erl_poll.c
@@ -1,19 +1,19 @@
 /*
  * %CopyrightBegin%
- * 
- * Copyright Ericsson AB 2006-2009. All Rights Reserved.
- * 
+ *
+ * Copyright Ericsson AB 2006-2010. All Rights Reserved.
+ *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
  * compliance with the License. You should have received a copy of the
  * Erlang Public License along with this software. If not, it can be
  * retrieved online at http://www.erlang.org/.
- * 
+ *
  * Software distributed under the License is distributed on an "AS IS"
  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  * the License for the specific language governing rights and limitations
  * under the License.
- * 
+ *
  * %CopyrightEnd%
  */
 
@@ -350,6 +350,7 @@ unset_interrupted_chk(ErtsPollSet ps)
 
 #endif
 
+void erts_silence_warn_unused_result(long unused);
 static void fatal_error(char *format, ...);
 static void fatal_error_async_signal_safe(char *error_str);
 
@@ -2554,8 +2555,10 @@ fatal_error_async_signal_safe(char *error_str)
 	int len = 0;
 	while (error_str[len])
 	    len++;
-	if (len)
-	    (void) write(2, error_str, len); /* async signal safe */
+	if (len) {
+	    /* async signal safe */
+	    erts_silence_warn_unused_result(write(2, error_str, len));
+	}
     }
     abort();
 }
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 183525b222..31ab5d03de 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -1,19 +1,19 @@
 /*
  * %CopyrightBegin%
- * 
- * Copyright Ericsson AB 1996-2009. All Rights Reserved.
- * 
+ *
+ * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
  * compliance with the License. You should have received a copy of the
  * Erlang Public License along with this software. If not, it can be
  * retrieved online at http://www.erlang.org/.
- * 
+ *
  * Software distributed under the License is distributed on an "AS IS"
  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  * the License for the specific language governing rights and limitations
  * under the License.
- * 
+ *
  * %CopyrightEnd%
  */
 
@@ -709,7 +709,7 @@ prepare_crash_dump(void)
 	if (nice_val > 39) {
 	    nice_val = 39;
 	}
-	nice(nice_val);
+	erts_silence_warn_unused_result(nice(nice_val));
     }
     
     envsz = sizeof(env);
@@ -2332,7 +2332,7 @@ sys_async_ready_failed(int fd, int r, int err)
     char buf[120];
     sprintf(buf, "sys_async_ready(): Fatal error: fd=%d, r=%d, errno=%d\n",
 	     fd, r, err);
-    (void) write(2, buf, strlen(buf));
+    erts_silence_warn_unused_result(write(2, buf, strlen(buf)));
     abort();
 }
 
@@ -2891,7 +2891,7 @@ smp_sig_notify(char c)
 	char msg[] =
 	    "smp_sig_notify(): Failed to notify signal-dispatcher thread "
 	    "about received signal";
-	(void) write(2, msg, sizeof(msg));
+	erts_silence_warn_unused_result(write(2, msg, sizeof(msg)));
 	abort();
     }
 }
@@ -3121,7 +3121,6 @@ erl_sys_args(int* argc, char** argv)
     *argc = j;
 }
 
-
 #ifdef ERTS_TIMER_THREAD
 
 /*
diff --git a/erts/emulator/sys/unix/sys_float.c b/erts/emulator/sys/unix/sys_float.c
index 15da6ab45c..c59c99f65e 100644
--- a/erts/emulator/sys/unix/sys_float.c
+++ b/erts/emulator/sys/unix/sys_float.c
@@ -1,19 +1,19 @@
 /*
  * %CopyrightBegin%
- * 
- * Copyright Ericsson AB 2001-2009. All Rights Reserved.
- * 
+ *
+ * Copyright Ericsson AB 2001-2010. All Rights Reserved.
+ *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
  * compliance with the License. You should have received a copy of the
  * Erlang Public License along with this software. If not, it can be
  * retrieved online at http://www.erlang.org/.
- * 
+ *
  * Software distributed under the License is distributed on an "AS IS"
  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  * the License for the specific language governing rights and limitations
  * under the License.
- * 
+ *
  * %CopyrightEnd%
  */
 
@@ -93,7 +93,8 @@ void erts_fp_check_init_error(volatile unsigned long *fpexnp)
     char buf[64];
     snprintf(buf, sizeof buf, "ERTS_FP_CHECK_INIT at %p: detected unhandled FPE at %p\r\n",
 	     __builtin_return_address(0), (void*)*fpexnp);
-    write(2, buf, strlen(buf));
+    if (write(2, buf, strlen(buf)) <= 0)
+	erl_exit(ERTS_ABORT_EXIT, "%s", buf);
     *fpexnp = 0;
 #if defined(__i386__) || defined(__x86_64__)
     erts_restore_fpu();