Avoid concurrent submake in makefile of UT

test/Makefile

@@ -149,7 +149,7 @@ clean_bins:
 clean_debug:
 	@$(MAKE) -C.. clean_debug
 
-../libbrpc.dbg.a ../libbvar.dbg.a: FORCE
+../libbrpc.dbg.a: FORCE
 	@$(MAKE) -C.. debug
 
 FORCE:
@@ -160,9 +160,9 @@ test_butil:$(TEST_BUTIL_OBJS) ../libbrpc.dbg.a
 	@echo "Linking $@"
 	@$(CXX) -o $@ $(LIBPATHS) -Xlinker "-(" $^ -Wl,-Bstatic $(STATIC_LINKINGS) -Wl,-Bdynamic -Xlinker "-)" $(DYNAMIC_LINKINGS)
 
-test_bvar:$(TEST_BVAR_OBJS) ../libbvar.dbg.a
+test_bvar:$(TEST_BVAR_OBJS) ../libbrpc.dbg.a
 	@echo "Linking $@"
-	@$(CXX) -o $@ $(LIBPATHS) -Xlinker "-(" $^ -Wl,-Bstatic $(STATIC_LINKINGS) -Wl,-Bdynamic -Xlinker "-)" $(DYNAMIC_LINKINGS)
+	@$(CXX) -o $@ $(LIBPATHS) -Xlinker "-(" $(TEST_BVAR_OBJS) ../libbvar.dbg.a -Wl,-Bstatic $(STATIC_LINKINGS) -Wl,-Bdynamic -Xlinker "-)" $(DYNAMIC_LINKINGS)
 
 bthread%unittest:bthread%unittest.o ../libbrpc.dbg.a
 	@echo "Linking $@"

test/run_tests.sh

@@ -9,18 +9,18 @@ for test_bin in $test_bins; do
     >&2 echo "[runtest] $test_bin"
     ./$test_bin
     rc=$?
-    if [[ $rc -ne 0 ]]; then
+    if [ $rc -ne 0 ]; then
         failed_test="$test_bin"
         break;
     fi
 done
-if [[ $test_num -eq 0 ]]; then
+if [ $test_num -eq 0 ]; then
     >&2 echo "[runtest] Cannot find any tests"
     exit 1
 fi
-if [[ -z "$failed_test" ]]; then
+if [ -z "$failed_test" ]; then
     >&2 echo "[runtest] $test_num succeeded"
-elif [[ $test_num -gt 1 ]]; then
+elif [ $test_num -gt 1 ]; then
     >&2 echo "[runtest] '$failed_test' failed, $((test_num-1)) succeeded"
 else
     >&2 echo "[runtest] '$failed_test' failed"