diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c6846793..c0f1f0948 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@
 cmake_minimum_required (VERSION 2.8.12)
 project (Jerry CXX C ASM)
 
-# Require g++ of version >= 4.8.0
+# Require g++ of version >= 4.7.0
  if(NOT CMAKE_COMPILER_IS_GNUCXX)
   message(FATAL_ERROR "g++ compiler is required")
  else()
@@ -23,8 +23,8 @@ project (Jerry CXX C ASM)
                   OUTPUT_VARIABLE GNU_CXX_VERSION
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-  if(${GNU_CXX_VERSION} VERSION_LESS 4.8.0)
-   message(FATAL_ERROR "g++ compiler version 4.8.0 or higher required")
+  if(${GNU_CXX_VERSION} VERSION_LESS 4.7.0)
+   message(FATAL_ERROR "g++ compiler version 4.7.0 or higher required")
   endif()
  endif()
 
@@ -177,7 +177,7 @@ project (Jerry CXX C ASM)
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -g -gdwarf-4")
 
  # Warnings
-  set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wall -Wextra -Wpedantic -Wlogical-op")
+  set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wall -Wextra -pedantic -Wlogical-op")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wformat-nonliteral -Winit-self -Wno-stack-protector")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wconversion -Wsign-conversion -Wformat-security")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wmissing-declarations -Wno-attributes")
@@ -250,6 +250,19 @@ project (Jerry CXX C ASM)
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc
                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_LOCATION})
+ # libgcc_eh
+  add_library(${PREFIX_IMPORTED_LIB}libgcc_eh STATIC IMPORTED)
+  execute_process(COMMAND ${CMAKE_C_COMPILER} ${FLAGS_COMMON_ARCH} -print-file-name=libgcc_eh.a
+                  OUTPUT_VARIABLE IMPORTED_LIBGCC_EH_LOCATION
+                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  if(EXISTS "${IMPORTED_LIBGCC_EH_LOCATION}")
+   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc_eh
+                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_EH_LOCATION})
+  else()
+   # If libgcc_eh not found, reference libgcc instead
+   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc_eh
+                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_LOCATION})
+  endif()
 
 # Platform-specific configuration
  set(MODIFIERS_LISTS ${MODIFIERS_LISTS_${PLATFORM_EXT}})
@@ -307,7 +320,8 @@ project (Jerry CXX C ASM)
     target_compile_definitions(${TARGET_NAME} PRIVATE ${DEFINES_JERRY})
     target_include_directories(${TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
     target_include_directories(${TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
-    target_link_libraries(${TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME} ${LIBC_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libgcc)
+    target_link_libraries(${TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME} ${LIBC_TARGET_NAME}
+                          ${PREFIX_IMPORTED_LIB}libgcc ${PREFIX_IMPORTED_LIB}libgcc_eh)
 
     add_cppcheck_target(${TARGET_NAME})
 
@@ -387,7 +401,8 @@ project (Jerry CXX C ASM)
     set_property(TARGET ${TARGET_NAME}
                  PROPERTY LINK_FLAGS "${COMPILE_FLAGS_JERRY} ${CXX_FLAGS_JERRY} ${FLAGS_COMMON_UNITTESTS} ${LINKER_FLAGS_COMMON}")
     target_include_directories(${TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
-    target_link_libraries(${TARGET_NAME} ${CORE_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libc ${PREFIX_IMPORTED_LIB}libgcc)
+    target_link_libraries(${TARGET_NAME} ${CORE_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libc
+                          ${PREFIX_IMPORTED_LIB}libgcc ${PREFIX_IMPORTED_LIB}libgcc_eh)
 
     add_cppcheck_target(${TARGET_NAME})
 
diff --git a/jerry-core/jerry-extension.inc.h b/jerry-core/jerry-extension.inc.h
index b34265b80..2ea5b6cce 100644
--- a/jerry-core/jerry-extension.inc.h
+++ b/jerry-core/jerry-extension.inc.h
@@ -39,10 +39,10 @@ enum
 static const jerry_extension_field_t jerry_extension_fields [JERRY_EXTENSION_FIELDS_NUMBER + 1] =
 {
 #define EXTENSION_FIELD(_field_name, _type, _value) \
-  { # _field_name, JERRY_API_DATA_TYPE_ ## _type, _value },
+  { # _field_name, JERRY_API_DATA_TYPE_ ## _type, { _value } },
 # include EXTENSION_DESCRIPTION_HEADER
 #undef EXTENSION_FIELD
-#define EMPTY_FIELD_ENTRY { NULL, JERRY_API_DATA_TYPE_UNDEFINED, NULL }
+#define EMPTY_FIELD_ENTRY { NULL, JERRY_API_DATA_TYPE_UNDEFINED, { NULL } }
   EMPTY_FIELD_ENTRY
 #undef EMPTY_FIELD_ENTRY
 };
@@ -87,7 +87,7 @@ static const jerry_extension_field_t jerry_extension_fields [JERRY_EXTENSION_FIE
 /* Functions' arguments description */
 #define EXTENSION_ARG(_arg_index, _type) [_arg_index] = { \
   (JERRY_API_DATA_TYPE_ ## _type), \
-  false /* just for initialization, should be overwritten upon call */ \
+  { false } /* just for initialization, should be overwritten upon call */ \
 }
 #define EXTENSION_FUNCTION(_function_name, _function_to_call, _ret_value_type, _args_number, ...) \
   static jerry_api_value_t jerry_extension_function_ ## _function_name ## _args [_args_number] = { \
@@ -103,13 +103,13 @@ static jerry_extension_function_t jerry_extension_functions [JERRY_EXTENSION_FUN
 #define EXTENSION_FUNCTION(_function_name, _function_to_call, _ret_value_type, _args_number, ...) \
   {  \
     # _function_name, jerry_extension_ ## _function_name ## _wrapper, \
-    { JERRY_API_DATA_TYPE_ ## _ret_value_type, false }, \
+    { JERRY_API_DATA_TYPE_ ## _ret_value_type, { false } }, \
     jerry_extension_function_ ## _function_name ## _args, \
      _args_number \
   },
 # include EXTENSION_DESCRIPTION_HEADER
 #undef EXTENSION_FUNCTION
-#define EMPTY_FUNCTION_ENTRY { NULL, NULL, { JERRY_API_DATA_TYPE_VOID, false }, NULL, 0 }
+#define EMPTY_FUNCTION_ENTRY { NULL, NULL, { JERRY_API_DATA_TYPE_VOID, { false } }, NULL, 0 }
   EMPTY_FUNCTION_ENTRY
 #undef EMPTY_FUNCTION_ENTRY
 };
diff --git a/jerry-core/mem/mem-pool.h b/jerry-core/mem/mem-pool.h
index 64cdfbca0..c37bef11d 100644
--- a/jerry-core/mem/mem-pool.h
+++ b/jerry-core/mem/mem-pool.h
@@ -59,10 +59,10 @@ typedef uint8_t mem_pool_chunk_index_t;
 typedef struct __attribute__ ((aligned (MEM_ALIGNMENT))) mem_pool_state_t
 {
   /** Offset of first free chunk from the beginning of the pool (mem_pool_chunk_index_t) */
-  unsigned int first_free_chunk : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
+  mem_pool_chunk_index_t first_free_chunk : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
 
   /** Number of free chunks (mem_pool_chunk_index_t) */
-  unsigned int free_chunks_number : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
+  mem_pool_chunk_index_t free_chunks_number : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
 
   /** Pointer to the next pool with same chunk size */
   mem_cpointer_t next_pool_cp : MEM_COMPRESSED_POINTER_WIDTH;
diff --git a/jerry-core/parser/js/lexer.h b/jerry-core/parser/js/lexer.h
index 40b3e4009..b9b0f5345 100644
--- a/jerry-core/parser/js/lexer.h
+++ b/jerry-core/parser/js/lexer.h
@@ -19,7 +19,7 @@
 #include "literal.h"
 
 #define INVALID_VALUE 255
-#define INVALID_LITERAL UINT32_MAX
+#define INVALID_LITERAL ((uint32_t) -1)
 
 /* Keywords.  */
 typedef enum __attr_packed___