diff --git a/cde/programs/dtfile/Main.c b/cde/programs/dtfile/Main.c
index 328ed85b9..945087698 100644
--- a/cde/programs/dtfile/Main.c
+++ b/cde/programs/dtfile/Main.c
@@ -285,7 +285,7 @@ static void ErrorHandler(
                         Display *disp,
                         XErrorEvent *event) ;
 static void ToolkitErrorHandler(
-                        char *message) ;
+                        char *message) __attribute__((noreturn)) ;
 static void Usage(
                         char **argv) ;
 static void RestrictModeUsage(
diff --git a/cde/programs/dtlogin/vgmain.c b/cde/programs/dtlogin/vgmain.c
index 0998fc113..6976a6b84 100644
--- a/cde/programs/dtlogin/vgmain.c
+++ b/cde/programs/dtlogin/vgmain.c
@@ -129,7 +129,7 @@ static void MyInsert( Widget w, XEvent *event, char **params,
 static void MyBackspace( Widget w, XEvent *event, char **params,
                         Cardinal *num_params) ;
 static int  ErrorHandler( Display *dpy, XErrorEvent *event) ;
-static void xtErrorHandler( String msg ) ;
+static void xtErrorHandler( String msg ) __attribute__((noreturn)) ;
 static void xtWarningHandler( String msg ) ;
 static void MakeOptionsProc( XtPointer data, XtIntervalId *id) ;
 static SIGVAL Terminate( int arg ) ;
diff --git a/cde/programs/dtprintinfo/libUI/MotifUI/Debug.c b/cde/programs/dtprintinfo/libUI/MotifUI/Debug.c
index b3bae84ee..d512f72d2 100644
--- a/cde/programs/dtprintinfo/libUI/MotifUI/Debug.c
+++ b/cde/programs/dtprintinfo/libUI/MotifUI/Debug.c
@@ -21,6 +21,7 @@
  * Floor, Boston, MA 02110-1301 USA
  */
 /* $TOG: Debug.c /main/5 1998/04/06 13:32:19 mgreess $ */
+#define _POSIX_C_SOURCE 2
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -39,7 +40,7 @@ static  const char *SysErrorMsg(int n);
 /* Error Handlers */
 static  int XIOError(Display *dpy);
 static  int XError(Display *dpy, XErrorEvent *event);
-static  void _XtError(String);
+static  void _XtError(String) __attribute__((noreturn));
 
 static Boolean G_DumpCore;
 
@@ -59,6 +60,7 @@ Debug(
  *   FUNCTION:
  *   RETURNS:
  */
+__attribute__((noreturn))
 static int
 XError(
    Display *dpy,
@@ -69,8 +71,7 @@ XError(
         return 0;
     if (G_DumpCore)
         kill(getpid(), SIGQUIT);
-    else
-        exit(1);
+    exit(1);
 }
 
 /*
@@ -78,6 +79,7 @@ XError(
  *   FUNCTION:
  *   RETURNS:
  */
+__attribute__((noreturn))
 static int
 XIOError(
    Display *dpy
@@ -92,8 +94,7 @@ XIOError(
         fprintf(stderr, INT_MESSAGE5);
     if (G_DumpCore)
         kill(getpid(), SIGQUIT);
-    else
-        exit(1);
+    exit(1);
 }
 
 /*
@@ -245,6 +246,7 @@ PrintXError(
  *   FUNCTION:
  *   RETURNS:
  */
+__attribute__((noreturn))
 static void
 _XtError(
     String string
@@ -253,6 +255,5 @@ _XtError(
     (void)fprintf(stderr, "XtToolkit Error: %s\n", string);
     if (G_DumpCore)
         kill(getpid(), SIGQUIT);
-    else
-        exit(1);
+    exit(1);
 }
diff --git a/cde/programs/dtsession/SmError.c b/cde/programs/dtsession/SmError.c
index 7801bcb65..6070216da 100644
--- a/cde/programs/dtsession/SmError.c
+++ b/cde/programs/dtsession/SmError.c
@@ -77,7 +77,7 @@ NlsStrings   		smNLS;
 static int LibError( Display *, XErrorEvent *) ;
 static int LibIOError( void ) ;
 static void ToolkitWarning( char *) ;
-static void ToolkitError( char *) ;
+static void ToolkitError( char *) __attribute__((noreturn)) ;
 
 
 
diff --git a/cde/programs/dtstyle/Main.c b/cde/programs/dtstyle/Main.c
index 20f8d1e0c..fcc92f9c2 100644
--- a/cde/programs/dtstyle/Main.c
+++ b/cde/programs/dtstyle/Main.c
@@ -116,7 +116,7 @@ static int IOErrorHandler(
                         Display *disp ) ;
 
 static void ToolkitErrorHandler(
-                        char *message) ;
+                        char *message) __attribute__((noreturn)) ;
 static void errParentMap( 
                         Widget w,
                         XtPointer client_data,
diff --git a/cde/programs/dtwm/WmError.h b/cde/programs/dtwm/WmError.h
index 860708981..59b295c67 100644
--- a/cde/programs/dtwm/WmError.h
+++ b/cde/programs/dtwm/WmError.h
@@ -36,7 +36,7 @@ extern void PrintFormatted(char *f, char *s0, char *s1, char *s2, char *s3, char
 extern void WmInitErrorHandler (Display *display);
 extern int WmXErrorHandler (Display *display, XErrorEvent *errorEvent);
 extern int WmXIOErrorHandler (Display *display);
-extern void WmXtErrorHandler (char *message);
+extern void WmXtErrorHandler (char *message) __attribute__((noreturn));
 extern void WmXtWarningHandler (char *message);
 extern void Warning (char *message);
 #ifndef NO_MESSAGE_CATALOG
diff --git a/cde/programs/dtwm/WmXSMP.h b/cde/programs/dtwm/WmXSMP.h
index b35cbf2a0..f6c0157d6 100644
--- a/cde/programs/dtwm/WmXSMP.h
+++ b/cde/programs/dtwm/WmXSMP.h
@@ -53,7 +53,7 @@
 
 extern void AddSMCallbacks(void);
 extern void ResignFromSM(void);
-extern void ExitWM(int exitCode);
+extern void ExitWM(int exitCode) __attribute__((noreturn));
 extern XrmDatabase LoadClientResourceDB(void);
 extern XrmDatabase SaveClientResourceDB(void);
 extern Boolean FindClientDBMatch(ClientData *, char **);