diff --git a/mps/code/comm.gmk b/mps/code/comm.gmk
index e8590cb1f38..abc9c5a3025 100644
--- a/mps/code/comm.gmk
+++ b/mps/code/comm.gmk
@@ -401,7 +401,7 @@ $(PFM)/$(VARIETY)/fotest: $(PFM)/$(VARIETY)/fotest.o \
 	$(TESTLIBOBJ) $(PFM)/$(VARIETY)/mps.a
 
 $(PFM)/$(VARIETY)/gcbench: $(PFM)/$(VARIETY)/gcbench.o \
-	$(TESTLIBOBJ) $(PFM)/$(VARIETY)/mps.a
+	$(FMTDYTSTOBJ) $(TESTLIBOBJ) $(PFM)/$(VARIETY)/mps.a
 
 $(PFM)/$(VARIETY)/locbwcss: $(PFM)/$(VARIETY)/locbwcss.o \
 	$(TESTLIBOBJ) $(PFM)/$(VARIETY)/mps.a
diff --git a/mps/code/djbench.c b/mps/code/djbench.c
index d81832500ff..a4fb093a7f6 100644
--- a/mps/code/djbench.c
+++ b/mps/code/djbench.c
@@ -123,8 +123,8 @@ DJRUN(dj_alloc, MPS_ALLOC, MPS_FREE)
 #define RESERVE_ALLOC(p, s) \
   do { \
     size_t _s = ALIGN_UP(s, (size_t)MPS_PF_ALIGN); \
-    mps_reserve(&p, ap, _s); \
-    mps_commit(ap, p, _s); \
+    (void)mps_reserve(&p, ap, _s); \
+    (void)mps_commit(ap, p, _s); \
   } while(0)
 #define RESERVE_FREE(p, s)  do { mps_free(pool, p, s); } while(0)
 
diff --git a/mps/code/gcbench.c b/mps/code/gcbench.c
index 7e0ccbfb323..5c01ba5d986 100644
--- a/mps/code/gcbench.c
+++ b/mps/code/gcbench.c
@@ -12,7 +12,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <alloca.h>
 #include <pthread.h>
 #include "getopt.h"
 #include "testlib.h"
@@ -219,16 +218,16 @@ static void weave1(gcthread_fn_t fn)
 
 static void watch(gcthread_fn_t fn, const char *name)
 {
-  clock_t start, finish;
+  clock_t begin, end;
   
-  start = clock();
+  begin = clock();
   if (nthreads == 1)
     weave1(fn);
   else
     weave(fn);
-  finish = clock();
+  end = clock();
   
-  printf("%s: %g\n", name, (double)(finish - start) / CLOCKS_PER_SEC);
+  printf("%s: %g\n", name, (double)(end - begin) / CLOCKS_PER_SEC);
 }