Configure Jansson to only allocate 4 hashtable buckets for empty object

Makefile

@@ -30,8 +30,8 @@ include $(BUILD_DIR)/Makefile.library.mk
 #
 CONFIG_H = $(SOURCE_DIR)/jansson_config.h
 
-$(CONFIG_H):
-	@cp $(PROJ_DIR)/armcc/jansson_config.h $(CONFIG_H)
+$(CONFIG_H): $(PROJ_DIR)/armcc/jansson_config.h
+	@cp $< $@
 
 $(OBJS): $(CONFIG_H)
 

Makefile.cppunit

@@ -22,8 +22,8 @@ OBJS += src/strconv.o
 OBJS += src/utf.o
 OBJS += src/value.o
 
-src/jansson_config.h:
-	cp cppunit/jansson_config.h $@
+src/jansson_config.h: cppunit/jansson_config.h
+	cp $< $@
 
 src/%.o: src/%.c $(HEADERS)
 	$(CC) $(CFLAGS) $(PROFILE_FLAGS) -c $< -o $@

armcc/jansson_config.h

@@ -36,4 +36,10 @@
    otherwise to 0. */
 #define JSON_HAVE_LOCALECONV 0
 
+/* Number of buckets new object hashtables contain is 2 raised to this power. The default is 3,
+   so empty hashtables contain 2^3 = 8 buckets. We use 2, so empty hashtables contain 2^2 = 4 
+   buckets. */
+#define INITIAL_HASHTABLE_ORDER 2
+
+
 #endif

cppunit/jansson_config.h

@@ -36,4 +36,9 @@
    otherwise to 0. */
 #define JSON_HAVE_LOCALECONV 0
 
+/* Number of buckets new object hashtables contain is 2 raised to this power. The default is 3,
+   so empty hashtables contain 2^3 = 8 buckets. We use 2, so empty hashtables contain 2^2 = 4 
+   buckets. */
+#define INITIAL_HASHTABLE_ORDER 2
+
 #endif