Zap some warnings in target files:

* frame.c: Include stdlib.h and unistd.h to possibly get various
        function prototypes.  The fixproto script guarantees these header
        files exist on the target system.
        * libgcc2.c: Likewise.
        * gthr-single.h (__gthread_mutex_lock, __gthread_mutex_trylock,
        __gthread_mutex_unlock): Add __attribute__ ((__unused__)) to the
        function parameters.
        * libgcc2.c (__udiv_w_sdiv): Likewise.

From-SVN: r19261

gcc/ChangeLog

@@ -1,3 +1,15 @@
+Fri Apr 17 11:21:43 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+        * frame.c: Include stdlib.h and unistd.h to possibly get various
+        function prototypes.  The fixproto script guarantees these header
+        files exist on the target system.
+        * libgcc2.c: Likewise.
+ 
+        * gthr-single.h (__gthread_mutex_lock, __gthread_mutex_trylock,
+        __gthread_mutex_unlock): Add __attribute__ ((__unused__)) to the
+        function parameters.
+        * libgcc2.c (__udiv_w_sdiv): Likewise.
+
 Thu Apr 16 22:41:02 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* varasm.c (asm_output_bss): Add prototype.

gcc/frame.c

@@ -32,6 +32,11 @@ Boston, MA 02111-1307, USA.  */
    do not apply.  */
 
 #include "tconfig.h"
+
+/* fixproto guarantees these system headers exist. */
+#include <stdlib.h>
+#include <unistd.h>
+
 #include "defaults.h"
 
 #ifdef DWARF2_UNWIND_INFO

gcc/gthr-single.h

@@ -42,19 +42,19 @@ __gthread_active_p ()
 }
 
 static inline int
-__gthread_mutex_lock (__gthread_mutex_t *mutex)
+__gthread_mutex_lock (__gthread_mutex_t *mutex __attribute__ ((__unused__)))
 {
   return 0;
 }
 
 static inline int
-__gthread_mutex_trylock (__gthread_mutex_t *mutex)
+__gthread_mutex_trylock (__gthread_mutex_t *mutex __attribute__ ((__unused__)))
 {
   return 0;
 }
 
 static inline int
-__gthread_mutex_unlock (__gthread_mutex_t *mutex)
+__gthread_mutex_unlock (__gthread_mutex_t *mutex __attribute__ ((__unused__)))
 {
   return 0;
 }

gcc/libgcc2.c

@@ -31,6 +31,11 @@ Boston, MA 02111-1307, USA.  */
    do not apply.  */
 
 #include "tconfig.h"
+
+/* fixproto guarantees these system headers exist. */
+#include <stdlib.h>
+#include <unistd.h>
+
 #include "machmode.h"
 #include "defaults.h" 
 #ifndef L_trampoline
@@ -391,7 +396,10 @@ __udiv_w_sdiv (USItype *rp, USItype a1, USItype a0, USItype d)
 #else
 /* If sdiv_qrnnd doesn't exist, define dummy __udiv_w_sdiv.  */
 USItype
-__udiv_w_sdiv (USItype *rp, USItype a1, USItype a0, USItype d)
+__udiv_w_sdiv (USItype *rp __attribute__ ((__unused__)),
+	       USItype a1 __attribute__ ((__unused__)),
+	       USItype a0 __attribute__ ((__unused__)),
+	       USItype d __attribute__ ((__unused__)))
 {
   return 0;
 }