diff --git a/Makefile b/Makefile
index 6e9b9c1ec..e312b97b6 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,7 @@
 TARGET ?= jerry
 CROSS_COMPILE	?= arm-none-eabi-
 OBJ_DIR = obj
+OUT_DIR = ./out
 
 SOURCES = \
 	$(sort \
@@ -51,6 +52,7 @@ LD  = ld
 OBJDUMP	= objdump
 OBJCOPY	= objcopy
 SIZE	= size
+STRIP	= strip
 
 CROSS_CC  = $(CROSS_COMPILE)gcc-4.9
 CROSS_LD  = $(CROSS_COMPILE)ld
@@ -71,35 +73,50 @@ CFLAGS ?= $(INCLUDES) -std=c99 -m32 -fdiagnostics-color=always
 #CFLAGS += -ffunction-sections -fdata-sections
 
 DEBUG_OPTIONS = -g3 -O0 -DDEBUG# -fsanitize=address
-RELEASE_OPTIONS = -Os -Werror
+RELEASE_OPTIONS = -Os -Werror -DNDEBUG
 
 DEFINES = -DMEM_HEAP_CHUNK_SIZE=256 -DMEM_HEAP_AREA_SIZE=32768
+TARGET_HOST = -D__HOST
+TARGET_MCU = -D__MCU
 
 .PHONY: all debug release clean check install
 
-all: debug
+all: clean debug release check
 
 debug:
-	$(CC) $(INCLUDES) $(CFLAGS) $(DEBUG_OPTIONS) $(DEFINES) $(SOURCES) \
-	-o $(TARGET)
+	mkdir -p $(OUT_DIR)/debug.host/
+	$(CC) $(CFLAGS) $(DEBUG_OPTIONS) $(DEFINES) $(TARGET_HOST) \
+	$(SOURCES) -o $(OUT_DIR)/debug.host/$(TARGET)
 
 release:
-	$(CC) $(INCLUDES) $(CFLAGS) $(RELEASE_OPTIONS) $(DEFINES) $(SOURCES) \
-	-o $(TARGET)
+	mkdir -p $(OUT_DIR)/release.host/
+	$(CC) $(CFLAGS) $(RELEASE_OPTIONS) $(DEFINES) $(TARGET_HOST) \
+	$(SOURCES) -o $(OUT_DIR)/release.host/$(TARGET)
+	$(STRIP) $(OUT_DIR)/release.host/$(TARGET)
 
 clean:
 	rm -f $(OBJ_DIR)/*.o *.bin *.o *~ *.log *.log
+	rm -rf $(OUT_DIR)
 	rm -f $(TARGET)
 	rm -f $(TARGET).elf
 	rm -f $(TARGET).bin
 	rm -f $(TARGET).map
 	rm -f $(TARGET).hex
 	rm -f $(TARGET).lst
-	rm -f jerry.error js.files
 
 check:
+	mkdir -p $(OUT_DIR)
+	cd $(OUT_DIR)
 	cppcheck $(HEADERS) $(SOURCES) --enable=all --std=c99
-	./tools/jerry_test.sh
+	
+	if [ -f $(OUT_DIR)/release.host/$(TARGET) ]; then \
+	./tools/jerry_test.sh $(OUT_DIR)/release.host/$(TARGET);\
+	fi
+	
+	if [ -f $(OUT_DIR)/debug.host/$(TARGET) ]; then \
+	./tools/jerry_test.sh $(OUT_DIR)/debug.host/$(TARGET);\
+	fi
+	
 
 install:
 	st-flash write $(TARGET).bin 0x08000000
diff --git a/src/libcoreint/interpreter.c b/src/libcoreint/interpreter.c
index 2ffe68063..a36429e56 100644
--- a/src/libcoreint/interpreter.c
+++ b/src/libcoreint/interpreter.c
@@ -13,37 +13,38 @@
  * limitations under the License.
  */
 
-#include "error.h"
-#include "lexer.h"
-#include "parser.h"
-#include "pretty-printer.h"
 #include "interpreter.h"
-#include "opcodes.h"
-
-#include "actuators.h"
 
 void
 gen_bytecode ()
 {
+#ifdef __HOST
   FILE *file = fopen (FILE_NAME, "w+b");
+#endif
 
-  save_op_data(file, get_op_loop_inf (1));
-  save_op_data(file, get_op_call_1(0, LED_GREEN));
-  save_op_data(file, get_op_call_1(0, LED_BLUE));
-  save_op_data(file, get_op_call_1(0, LED_ORANGE));
-  save_op_data(file, get_op_call_1(0, LED_RED));
-  save_op_data(file, get_op_jmp(0));
-
+  //TODO REMOVE
+  {
+    save_op_data (file, get_op_loop_inf (1));
+    save_op_data (file, get_op_call_1 (0, 12));
+    save_op_data (file, get_op_call_1 (0, 13));
+    save_op_data (file, get_op_call_1 (0, 14));
+    save_op_data (file, get_op_call_1 (0, 15));
+    save_op_data (file, get_op_jmp (0)); // mandatory!
+  }
+  
+#ifdef __HOST
   fclose (file);
+#endif
 }
 
 void
 run_int ()
 {
-  FILE *file = fopen (FILE_NAME, "rb");
   OPCODE op_curr;
   __int_data.pos = 0;
 
+#ifdef __HOST
+  FILE *file = fopen (FILE_NAME, "rb");
 
   if (file == NULL)
   {
@@ -59,11 +60,12 @@ run_int ()
     }
 
     __int_data.pos++;
-
     op_curr.opfunc_ptr (op_curr);
+
     fseek (file, __int_data.pos * sizeof (OPCODE), SEEK_SET);
   }
 
   fclose (file);
+#endif
 }
 
diff --git a/src/libcoreint/interpreter.h b/src/libcoreint/interpreter.h
index 4544e2036..f898cae95 100644
--- a/src/libcoreint/interpreter.h
+++ b/src/libcoreint/interpreter.h
@@ -16,20 +16,22 @@
 #ifndef INTERPRETER_H
 #define	INTERPRETER_H
 
+#ifdef __HOST
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "opcodes.h"
-
 #define FILE_NAME "application.bin"
+#endif
+
+#include "opcodes.h"
 
 struct
 {
   int pos;
+  int *root_op_addr;
 } __int_data;
 
-
 void gen_bytecode ();
 void run_int ();
 
diff --git a/src/libcoreint/opcode-structures.h b/src/libcoreint/opcode-structures.h
new file mode 100644
index 000000000..146df4a4a
--- /dev/null
+++ b/src/libcoreint/opcode-structures.h
@@ -0,0 +1,88 @@
+/* Copyright 2014 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef OPCODE_STRUCTURES_H
+#define	OPCODE_STRUCTURES_H
+
+OP_DEF (nop) { };
+
+OP_DEF (jmp)
+{
+  OP_TYPE_IDX opcode_idx;
+};
+
+OP_DEF (decl) { };
+
+OP_DEF (decl_func_named)
+{
+  OP_TYPE_IDX name_literal_idx;
+  
+};
+
+OP_DEF (decl_func_anon) { };
+
+OP_DEF (decl_var_global) { };
+
+OP_DEF (decl_var_local) { };
+
+/** Call with 1 argument */
+OP_DEF (call_1)
+{
+  OP_TYPE_IDX name_literal_idx;
+  OP_TYPE_IDX arg1_literal_idx;
+};
+
+OP_DEF (call_2)
+{
+  OP_TYPE_IDX name_literal_idx;
+  OP_TYPE_IDX arg1_literal_idx;
+  OP_TYPE_IDX arg2_literal_idx;
+};
+
+OP_DEF (call_n) { };
+
+OP_DEF (list_header) { };
+OP_DEF (list_element) { };
+OP_DEF (list_tail) { };
+
+OP_DEF (try_begin) { };
+
+OP_DEF (try_end) { };
+
+OP_DEF (catch_begin) { };
+
+OP_DEF (catch_end) { };
+
+OP_DEF (finally_begin) { };
+
+OP_DEF (finally_end) { };
+
+OP_DEF (with_begin) { };
+
+OP_DEF (with_end) { };
+
+OP_DEF (loop_inf)
+{
+  OP_TYPE_IDX opcode_idx;
+};
+
+OP_DEF (loop_cond_pre) { };
+
+OP_DEF (loop_cond_post) { };
+
+OP_DEF (swtch) { };
+
+#endif	/* OPCODE_STRUCTURES_H */
+
diff --git a/src/libcoreint/opcodes.c b/src/libcoreint/opcodes.c
index 90261199a..b113f6d60 100644
--- a/src/libcoreint/opcodes.c
+++ b/src/libcoreint/opcodes.c
@@ -16,14 +16,33 @@
 #include "opcodes.h"
 #include "interpreter.h"
 
-#include <stdio.h>
-#include <stdlib.h>
+void
+#ifdef __HOST
+save_op_data (FILE *file, OPCODE opdata)
+#elif __MCU
+save_op_data (OPCODE opdata)
+#endif
+{
+#ifdef __HOST
+  if (file == NULL)
+  {
+    return;
+  }
+
+  fwrite (&opdata, sizeof (OPCODE), 1, file);
+
+#elif __MCU
+  JERRY_STATIC_ASSERT (false);
+#endif
+}
 
 void
 opfunc_loop_inf (OPCODE opdata)
 {
+#ifdef __HOST
   printf ("loop_inf:idx:%d\n",
           opdata.data.loop_inf.opcode_idx);
+#endif
 
   __int_data.pos = opdata.data.loop_inf.opcode_idx;
 }
@@ -31,16 +50,20 @@ opfunc_loop_inf (OPCODE opdata)
 void
 opfunc_op_call_1 (OPCODE opdata)
 {
+#ifdef __HOST
   printf ("op_call_1:idx:%d:%d\n",
           opdata.data.call_1.name_literal_idx,
           opdata.data.call_1.arg1_literal_idx);
+#endif
 }
 
 void
 opfunc_op_jmp (OPCODE opdata)
 {
+#ifdef __HOST
   printf ("op_jmp:idx:%d\n",
           opdata.data.jmp.opcode_idx);
+#endif
 
   __int_data.pos = opdata.data.jmp.opcode_idx;
 }
@@ -78,14 +101,3 @@ get_op_loop_inf (int arg1)
 
   return opdata;
 }
-
-void
-save_op_data (FILE *file, OPCODE opdata)
-{
-  if (file == NULL)
-  {
-    return;
-  }
-
-  fwrite (&opdata, sizeof (OPCODE), 1, file);
-}
\ No newline at end of file
diff --git a/src/libcoreint/opcodes.h b/src/libcoreint/opcodes.h
index c304ab0d7..c6d369139 100644
--- a/src/libcoreint/opcodes.h
+++ b/src/libcoreint/opcodes.h
@@ -16,7 +16,9 @@
 #ifndef OPCODES_H
 #define	OPCODES_H
 
+#ifdef __HOST
 #include <stdio.h>
+#endif
 
 #include "globals.h"
 
@@ -30,77 +32,8 @@ OPCODE;
 
 typedef void (*opfunc)(OPCODE);
 
-OP_DEF (nop) { };
+#include "opcode-structures.h"
 
-OP_DEF (jmp)
-{
-  OP_TYPE_IDX opcode_idx;
-};
-
-OP_DEF (decl) { };
-
-OP_DEF (decl_func_named)
-{
-  OP_TYPE_IDX name_literal_idx;
-  
-};
-
-OP_DEF (decl_func_anon) { };
-
-OP_DEF (decl_var_global) { };
-
-OP_DEF (decl_var_local) { };
-
-/** Call with 1 argument */
-OP_DEF (call_1)
-{
-  OP_TYPE_IDX name_literal_idx;
-  OP_TYPE_IDX arg1_literal_idx;
-};
-
-OP_DEF (call_2)
-{
-  OP_TYPE_IDX name_literal_idx;
-  OP_TYPE_IDX arg1_literal_idx;
-  OP_TYPE_IDX arg2_literal_idx;
-};
-
-OP_DEF (call_n) { };
-
-OP_DEF (list_header) { };
-
-OP_DEF (list_element) { };
-
-OP_DEF (list_tail) { };
-
-OP_DEF (try_begin) { };
-
-OP_DEF (try_end) { };
-
-OP_DEF (catch_begin) { };
-
-OP_DEF (catch_end) { };
-
-OP_DEF (finally_begin) { };
-
-OP_DEF (finally_end) { };
-
-OP_DEF (with_begin) { };
-
-OP_DEF (with_end) { };
-
-OP_DEF (loop_inf)
-{
-  OP_TYPE_IDX opcode_idx;
-};
-
-OP_DEF (loop_cond_pre) { };
-
-OP_DEF (loop_cond_post) { };
-
-OP_DEF (swtch) { };
-
-/** OPCODES */
 union __opdata
 {
   OP (loop_inf);
@@ -118,8 +51,12 @@ OPCODE{
 }
 __packed;
 
+#ifdef __HOST
+void save_op_data (FILE*, OPCODE);
+#elif __MCU
+void save_op_data (OPCODE);
+#endif
 
-void save_op_data (FILE *, OPCODE);
 
 OPCODE get_op_loop_inf (int);
 OPCODE get_op_call_1 (int, int);
diff --git a/src/main.c b/src/main.c
index 0c0ba42e0..3ed82f54a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -73,7 +73,7 @@ main (int argc, char **argv)
 
   //gen_bytecode (generated_source);
   gen_bytecode (file);
-  run_int ();
+ // run_int ();
 
 #ifdef __TARGET_MCU
   fake_exit ();