TRy to complain with C++11 on all possible cases

* Minetest for C++11 CMakeLists or C++0X on pre supported
* Clang format fixes on checked files (compat Cpp11 instead of Cpp03)
* Mingw GCC update from 4.8.4 to 5.3 (Ubuntu Xenial)
* Let compatibilty for GCC 4.4+
* Fix initialization standars for C++11 on mayor cases

.clang-format

@@ -2,7 +2,7 @@ BasedOnStyle: LLVM
 IndentWidth: 8
 UseTab: Always
 BreakBeforeBraces: Custom
-Standard: Cpp03
+Standard: Cpp11
 BraceWrapping:
   AfterClass: true
   AfterControlStatement: false

CMakeLists.txt

@@ -5,6 +5,16 @@ if(${CMAKE_VERSION} STREQUAL "2.8.2")
 	message(WARNING "CMake/CPack version 2.8.2 will not create working .deb packages!")
 endif()
 
+if (CMAKE_VERSION VERSION_LESS "3.1")
+	if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+		set (CMAKE_C_FLAGS "--std=gnu99 ${CMAKE_C_FLAGS}")
+		set (CMAKE_CXX_FLAGS "--std=gnu++0x ${CMAKE_C_FLAGS}")
+	endif ()
+else ()
+	set(CMAKE_C_STANDARD 11)
+	set(CMAKE_CXX_STANDARD 11)
+endif ()
+
 # This can be read from ${PROJECT_NAME} after project() is called
 project(minetest)
 set(PROJECT_NAME_CAPITALIZED "Minetest4")

src/CMakeLists.txt

@@ -23,7 +23,6 @@ set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
 	FORCE
 )
 
-
 # Set some random things default to not being visible in the GUI
 mark_as_advanced(EXECUTABLE_OUTPUT_PATH LIBRARY_OUTPUT_PATH)
 
@@ -722,9 +721,9 @@ include(CheckCSourceCompiles)
 
 if(MSVC)
 	# Visual Studio
-
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++11")
 	# EHa enables SEH exceptions (used for catching segfaults)
-	set(CMAKE_CXX_FLAGS_RELEASE "/EHa /Ox /GL /FD /MT /GS- /Zi /arch:SSE /fp:fast /D NDEBUG /D _HAS_ITERATOR_DEBUGGING=0 /TP")
+	set(CMAKE_CXX_FLAGS_RELEASE "/EHa /Ox /GL /FD /MT /GS- /Zi /arch:SSE /fp:fast /D NDEBUG /D _HAS_ITERATOR_DEBUGGING=0 /TP /std:c++11")
 	#set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/LTCG /NODEFAULTLIB:\"libcmtd.lib\" /NODEFAULTLIB:\"libcmt.lib\"")
 	set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/LTCG /INCREMENTAL:NO /DEBUG /OPT:REF /OPT:ICF")
 
@@ -772,6 +771,15 @@ else()
 				SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-Ttext-segment=0x200000000")
 			endif()
 		endif()
+		if (CMAKE_VERSION VERSION_LESS "3.1")
+			if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+				set (CMAKE_C_FLAGS "--std=gnu99 ${CMAKE_C_FLAGS}")
+				set (CMAKE_CXX_FLAGS "--std=gnu++0x ${CMAKE_C_FLAGS}")
+			endif ()
+		else ()
+			set(CMAKE_C_STANDARD 11)
+			set(CMAKE_CXX_STANDARD 11)
+		endif ()
 	endif()
 	if(WIN32 AND NOT ZLIBWAPI_DLL AND CMAKE_SIZEOF_VOID_P EQUAL 4)
 		set(OTHER_FLAGS "${OTHER_FLAGS} -DWIN32_NO_ZLIB_WINAPI")

src/serverobject.h

@@ -203,7 +203,7 @@ public:
 		deleted until this is 0 to keep the id preserved for the right
 		object.
 	*/
-	u16 m_known_by_count;
+	u16 m_known_by_count = 0;
 
 	/*
 		- Whether this object is to be removed when nobody knows about
@@ -213,7 +213,7 @@ public:
 		- This is usually set to true by the step() method when the object wants
 		  to be deleted but can be set by anything else too.
 	*/
-	bool m_pending_removal;
+	bool m_pending_removal = true;
 
 	/*
 		Same purpose as m_pending_removal but for deactivation.
@@ -222,7 +222,7 @@ public:
 		If this is set alongside with m_pending_removal, removal takes
 		priority.
 	*/
-	bool m_pending_deactivation;
+	bool m_pending_deactivation = false;
 
 	/*
 		A getter that unifies the above to answer the question:
@@ -234,12 +234,12 @@ public:
 	/*
 		Whether the object's static data has been stored to a block
 	*/
-	bool m_static_exists;
+	bool m_static_exists = false;
 	/*
 		The block from which the object was loaded from, and in which
 		a copy of the static data resides.
 	*/
-	v3s16 m_static_block;
+	v3s16 m_static_block = v3s16(1337,1337,1337);
 
 	/*
 		Queue of messages to be sent to the client

src/settings.h

@@ -90,9 +90,9 @@ struct SettingsEntry {
 		is_group(true)
 	{}
 
-	std::string value;
+	std::string value = "";
 	Settings *group;
-	bool is_group;
+	bool is_group = false;
 };
 
 typedef UNORDERED_MAP<std::string, SettingsEntry> SettingEntries;

src/shader.h

@@ -45,11 +45,11 @@ std::string getShaderPath(const std::string &name_of_shader,
 		const std::string &filename);
 
 struct ShaderInfo {
-	std::string name;
-	video::E_MATERIAL_TYPE base_material;
-	video::E_MATERIAL_TYPE material;
-	u8 drawtype;
-	u8 material_type;
+	std::string name = "";
+	video::E_MATERIAL_TYPE base_material = video::EMT_SOLID;
+	video::E_MATERIAL_TYPE material = video::EMT_SOLID;
+	u8 drawtype = 0;
+	u8 material_type = 0;
 	s32 user_data;
 
 	ShaderInfo(): name(""), base_material(video::EMT_SOLID),