Minetest for C++11 (CMakeLists + Travis)

* Move GCC to GCC 6 & GCC 7
* Move Clang to Clang 3.6 & Clang 4.0
* LINT moves from Clang 3.9 to Clang 4.0
* Move XCode 7.3 to 8.0
* Use more travis tricks to install compilers instead of adding complexity to our build script
* Clang format fixes on checked files (compat Cpp11 instead of Cpp03)
* Mingw GCC update from 4.8.4 to 5.3 (Ubuntu Xenial)
* Drop mingw cmake generated files and add them to gitignore

16 files changed, 144 insertions, 72 deletions

diff --git a/.clang-format b/.clang-format
index d2e2f2940..f1d51a04f 100644
--- a/.clang-format
+++ b/.clang-format
@@ -2,7 +2,7 @@ BasedOnStyle: LLVM
 IndentWidth: 8
 UseTab: Always
 BreakBeforeBraces: Custom
-Standard: Cpp03
+Standard: Cpp11
 BraceWrapping:
   AfterClass: true
   AfterControlStatement: false
diff --git a/.travis.yml b/.travis.yml
index 57d934c90..123705fe6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: cpp
 before_install: ./util/travis/before_install.sh
 script: ./util/travis/script.sh
 sudo: required
+dist: trusty
 notifications:
   email: false
 matrix:
@@ -10,30 +11,81 @@ matrix:
     - env: PLATFORM=Win32
       compiler: gcc
       os: linux
+      addons:
+        apt:
+          packages: ['gcc-mingw-w64-i686', 'g++-mingw-w64-i686', 'binutils-mingw-w64-i686']
+          sources: &sources
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb http://mirrors.kernel.org/ubuntu xenial main universe'
+
     - env: PLATFORM=Win64
       compiler: gcc
       os: linux
-    - env: PLATFORM=Unix COMPILER=clang
+      addons:
+        apt:
+          packages: ['gcc-mingw-w64-x86-64', 'g++-mingw-w64-x86-64', 'binutils-mingw-w64-x86-64']
+          sources: &sources
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb http://mirrors.kernel.org/ubuntu xenial main universe'
+
+    - env: PLATFORM=Unix
       compiler: clang
       os: osx
-    - env: PLATFORM=Unix COMPILER=g++
+      osx_image: xcode8
+
+    - env: PLATFORM=Unix COMPILER=gcc-6
       compiler: gcc
       os: linux
-    - env: PLATFORM=Unix COMPILER=clang
+      addons:
+        apt:
+          packages: ['gcc-6', 'g++-6']
+          sources: &sources
+            - ubuntu-toolchain-r-test
+
+    - env: PLATFORM=Unix COMPILER=gcc-7
+      compiler: gcc
+      os: linux
+      addons:
+        apt:
+          packages: ['gcc-7', 'g++-7']
+          sources: &sources
+            - ubuntu-toolchain-r-test
+
+    - env: PLATFORM=Unix COMPILER=clang-3.6
       compiler: clang
       os: linux
-    - env: PLATFORM=Unix COMPILER=clang VALGRIND=1
+      addons:
+        apt:
+          packages: ['clang-3.6', 'clang++-3.6']
+          sources: &sources
+            - llvm-toolchain-trusty-3.6
+
+    - env: PLATFORM=Unix COMPILER=clang-4.0
       compiler: clang
       os: linux
-      dist: trusty
-    - env: COMPILER=none LINT=1
+      addons:
+        apt:
+          packages: ['clang-4.0', 'clang++-4.0']
+          sources: &sources
+            - llvm-toolchain-trusty-4.0
+
+    - env: PLATFORM=Unix COMPILER=clang-4.0 VALGRIND=1
       compiler: clang
       os: linux
-      dist: trusty
-    - env: PLATFORM=Unix COMPILER=g++-6
-      compiler: gcc
+      addons:
+        apt:
+          packages: ['valgrind', 'clang-4.0', 'clang++-4.0']
+          sources: &sources
+            - llvm-toolchain-trusty-4.0
+
+    - env: LINT=1
+      compiler: clang
       os: linux
-addons:
-  apt:
-    sources: &sources
-      - ubuntu-toolchain-r-test
+      addons:
+        apt:
+          packages: ['clang-format-4.0']
+          sources: &sources
+            - llvm-toolchain-trusty-4.0
+
+
+
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 763d554b9..5494c91b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,8 @@ endif()
 project(minetest)
 set(PROJECT_NAME_CAPITALIZED "Minetest")
 
+# Works only for cmake 3.1 and greater
+set(CMAKE_CXX_STANDARD 11)
 
 # Also remember to set PROTOCOL_VERSION in network/networkprotocol.h when releasing
 set(VERSION_MAJOR 0)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7c1a4eee0..6963d0306 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -708,7 +708,7 @@ include(CheckCXXCompilerFlag)
 
 if(MSVC)
 	# Visual Studio
-
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++11")
 	# EHa enables SEH exceptions (used for catching segfaults)
 	set(CMAKE_CXX_FLAGS_RELEASE "/EHa /Ox /GL /FD /MT /GS- /Zi /arch:SSE /fp:fast /D NDEBUG /D _HAS_ITERATOR_DEBUGGING=0 /TP")
 	#set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/LTCG /NODEFAULTLIB:\"libcmtd.lib\" /NODEFAULTLIB:\"libcmt.lib\"")
@@ -728,9 +728,10 @@ if(MSVC)
 	# /MT = Link statically with standard library stuff
 	set(CMAKE_C_FLAGS_RELEASE "/O2 /Ob2 /MT")
 else()
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 	# Probably GCC
 	if(APPLE)
-		SET( CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} -pagezero_size 10000 -image_base 100000000" )
+		SET(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} -pagezero_size 10000 -image_base 100000000" )
 	endif()
 	if(WARN_ALL)
 		set(RELEASE_WARNING_FLAGS "-Wall")
diff --git a/src/database-dummy.h b/src/database-dummy.h
index 7d1cb2279..c4060d5f1 100644
--- a/src/database-dummy.h
+++ b/src/database-dummy.h
@@ -40,6 +40,7 @@ public:
 
 	void beginSave() {}
 	void endSave() {}
+
 private:
 	std::map<s64, std::string> m_database;
 };
diff --git a/src/database-leveldb.h b/src/database-leveldb.h
index 52ccebe70..1a51f98b6 100644
--- a/src/database-leveldb.h
+++ b/src/database-leveldb.h
@@ -41,6 +41,7 @@ public:
 
 	void beginSave() {}
 	void endSave() {}
+
 private:
 	leveldb::DB *m_database;
 };
diff --git a/src/environment.h b/src/environment.h
index 1de13e9ed..5a40ff31a 100644
--- a/src/environment.h
+++ b/src/environment.h
@@ -79,6 +79,7 @@ public:
 	u32 m_added_objects;
 
 	IGameDef *getGameDef() { return m_gamedef; }
+
 protected:
 	GenericAtomic<float> m_time_of_day_speed;
 
diff --git a/src/nameidmapping.h b/src/nameidmapping.h
index a2f3a3062..be353327d 100644
--- a/src/nameidmapping.h
+++ b/src/nameidmapping.h
@@ -80,6 +80,7 @@ public:
 		return true;
 	}
 	u16 size() const { return m_id_to_name.size(); }
+
 private:
 	UNORDERED_MAP<u16, std::string> m_id_to_name;
 	UNORDERED_MAP<std::string, u16> m_name_to_id;
diff --git a/src/script/lua_api/l_metadata.h b/src/script/lua_api/l_metadata.h
index a4d8214d3..a479e64b0 100644
--- a/src/script/lua_api/l_metadata.h
+++ b/src/script/lua_api/l_metadata.h
@@ -32,6 +32,7 @@ class MetaDataRef : public ModApiBase
 {
 public:
 	virtual ~MetaDataRef() {}
+
 protected:
 	static MetaDataRef *checkobject(lua_State *L, int narg);
 
diff --git a/src/touchscreengui.h b/src/touchscreengui.h
index f4f1766c9..a8c59fa9a 100644
--- a/src/touchscreengui.h
+++ b/src/touchscreengui.h
@@ -172,7 +172,7 @@ private:
 	IEventReceiver *m_receiver;
 	ISimpleTextureSource *m_texturesource;
 	v2u32 m_screensize;
-	std::map<int, rect<s32> > m_hud_rects;
+	std::map<int, rect<s32>> m_hud_rects;
 	std::map<int, irr::EKEY_CODE> m_hud_ids;
 	bool m_visible; // is the gui visible
 
diff --git a/util/buildbot/buildwin32.sh b/util/buildbot/buildwin32.sh
index d807003d2..26f43b235 100755
--- a/util/buildbot/buildwin32.sh
+++ b/util/buildbot/buildwin32.sh
@@ -16,13 +16,13 @@ toolchain_file=$dir/toolchain_mingw.cmake
 irrlicht_version=1.8.4
 ogg_version=1.3.2
 vorbis_version=1.3.5
-curl_version=7.50.3
+curl_version=7.54.0
 gettext_version=0.19.8.1
-freetype_version=2.7
-sqlite3_version=3.14.2
-luajit_version=2.1.0-beta2
-leveldb_version=1.18
-zlib_version=1.2.8
+freetype_version=2.8
+sqlite3_version=3.19.2
+luajit_version=2.1.0-beta3
+leveldb_version=1.19
+zlib_version=1.2.11
 
 mkdir -p $packagedir
 mkdir -p $libdir
diff --git a/util/buildbot/buildwin64.sh b/util/buildbot/buildwin64.sh
index 3d6965f1e..31d9aad7a 100755
--- a/util/buildbot/buildwin64.sh
+++ b/util/buildbot/buildwin64.sh
@@ -16,13 +16,13 @@ toolchain_file=$dir/toolchain_mingw64.cmake
 irrlicht_version=1.8.4
 ogg_version=1.3.2
 vorbis_version=1.3.5
-curl_version=7.50.3
+curl_version=7.54.0
 gettext_version=0.19.8.1
-freetype_version=2.7
-sqlite3_version=3.14.2
-luajit_version=2.1.0-beta2
-leveldb_version=1.18
-zlib_version=1.2.8
+freetype_version=2.8
+sqlite3_version=3.19.2
+luajit_version=2.1.0-beta3
+leveldb_version=1.19
+zlib_version=1.2.11
 
 mkdir -p $packagedir
 mkdir -p $libdir
diff --git a/util/travis/before_install.sh b/util/travis/before_install.sh
index a4328fa46..afc16c332 100755
--- a/util/travis/before_install.sh
+++ b/util/travis/before_install.sh
@@ -1,49 +1,33 @@
 #!/bin/bash -e
+
 echo "Preparing for $TRAVIS_COMMIT_RANGE"
 
-if [[ "$LINT" == "1" ]]; then
-	curl http://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-	sudo add-apt-repository "deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-3.9 main"
-	sudo apt-get -yq update
-	sudo apt-get install clang-format-3.9
+. util/travis/common.sh
+
+if [[ "${LINT}" == "1" ]]; then
 	exit 0
 fi
 
-. util/travis/common.sh
 needs_compile || exit 0
 
-if [[ $TRAVIS_OS_NAME == "linux" ]]; then
-	sudo apt-get update
-	sudo apt-get install p7zip-full $COMPILER
-fi
-
 if [[ $PLATFORM == "Unix" ]]; then
 	if [[ $TRAVIS_OS_NAME == "linux" ]]; then
-		sudo apt-get update
-		sudo apt-get install libirrlicht-dev cmake libbz2-dev libpng12-dev \
-			libjpeg-dev libxxf86vm-dev libgl1-mesa-dev libsqlite3-dev \
-			libhiredis-dev libogg-dev libgmp-dev libvorbis-dev libopenal-dev \
-			gettext libpq-dev postgresql-server-dev-all
-		# Linking to LevelDB is broken, use a custom build
-		wget http://minetest.kitsunemimi.pw/libleveldb-1.18-ubuntu12.04.7z
-		sudo 7z x -o/usr libleveldb-1.18-ubuntu12.04.7z
-		if [[ "$VALGRIND" == "1" ]]; then
-			sudo apt-get install valgrind
-		fi
-
+		install_linux_deps
 	else
-		brew update
-		brew install freetype gettext hiredis irrlicht jpeg leveldb libogg libvorbis luajit
-		#brew upgrade postgresql
+		install_macosx_deps
 	fi
 elif [[ $PLATFORM == "Win32" ]]; then
-	wget http://minetest.kitsunemimi.pw/mingw_w64_i686_ubuntu12.04_4.9.1.7z -O mingw.7z
+	sudo apt-get update
+	sudo apt-get install p7zip-full
+	wget http://minetest.kitsunemimi.pw/mingw-w64-i686_7.1.1_ubuntu14.04.7z -O mingw.7z
 	sed -e "s|%PREFIX%|i686-w64-mingw32|" \
 		-e "s|%ROOTPATH%|/usr/i686-w64-mingw32|" \
 		< util/travis/toolchain_mingw.cmake.in > util/buildbot/toolchain_mingw.cmake
 	sudo 7z x -y -o/usr mingw.7z
 elif [[ $PLATFORM == "Win64" ]]; then
-	wget http://minetest.kitsunemimi.pw/mingw_w64_x86_64_ubuntu12.04_4.9.1.7z -O mingw.7z
+	sudo apt-get update
+	sudo apt-get install p7zip-full
+	wget http://minetest.kitsunemimi.pw/mingw-w64-x86_64_7.1.1_ubuntu14.04.7z -O mingw.7z
 	sed -e "s|%PREFIX%|x86_64-w64-mingw32|" \
 		-e "s|%ROOTPATH%|/usr/x86_64-w64-mingw32|" \
 		< util/travis/toolchain_mingw.cmake.in > util/buildbot/toolchain_mingw64.cmake
diff --git a/util/travis/common.sh b/util/travis/common.sh
index 35ceec08d..a5b2de728 100644
--- a/util/travis/common.sh
+++ b/util/travis/common.sh
@@ -1,5 +1,40 @@
 #!/bin/bash -e
 
+set_linux_compiler_env() {
+	if [[ "${COMPILER}" == "gcc-5.1" ]]; then
+		export CC=gcc-5.1
+		export CXX=g++-5.1
+	elif [[ "${COMPILER}" == "gcc-6" ]]; then
+		export CC=gcc-6
+		export CXX=g++-6
+	elif [[ "${COMPILER}" == "gcc-7" ]]; then
+		export CC=gcc-7
+		export CXX=g++-7
+	elif [[ "${COMPILER}" == "clang-3.6" ]]; then
+		export CC=clang-3.6
+		export CXX=clang++-3.6
+	elif [[ "${COMPILER}" == "clang-4.0" ]]; then
+		export CC=clang-4.0
+		export CXX=clang++-4.0
+	fi
+}
+
+# Linux build only
+install_linux_deps() {
+	sudo apt-get update
+	sudo apt-get install libirrlicht-dev cmake libbz2-dev libpng12-dev \
+		libjpeg-dev libxxf86vm-dev libgl1-mesa-dev libsqlite3-dev \
+		libhiredis-dev libogg-dev libgmp-dev libvorbis-dev libopenal-dev \
+		gettext libpq-dev libleveldb-dev
+}
+
+# Mac OSX build only
+install_macosx_deps() {
+	brew update
+	brew install freetype gettext hiredis irrlicht jpeg leveldb libogg libvorbis luajit
+	#brew upgrade postgresql
+}
+
 # Relative to git-repository root:
 TRIGGER_COMPILE_PATHS="src/.*\.(c|cpp|h)|CMakeLists.txt|cmake/Modules/|util/travis/|util/buildbot/"
 
diff --git a/util/travis/lint.sh b/util/travis/lint.sh
index cd5f41779..555cf3ebe 100644
--- a/util/travis/lint.sh
+++ b/util/travis/lint.sh
@@ -1,8 +1,8 @@
 #! /bin/bash
 function perform_lint() {
 	echo "Performing LINT..."
-	if hash clang-format-3.9 2>/dev/null; then
-		CLANG_FORMAT=clang-format-3.9
+	if hash clang-format-4.0 2>/dev/null; then
+		CLANG_FORMAT=clang-format-4.0
 	else
 		CLANG_FORMAT=clang-format
 	fi
diff --git a/util/travis/script.sh b/util/travis/script.sh
index 14b8dfb73..e5be1fe32 100755
--- a/util/travis/script.sh
+++ b/util/travis/script.sh
@@ -10,22 +10,15 @@ if [[ "$LINT" == "1" ]]; then
 	exit 0
 fi
 
-if [[ $PLATFORM == "Unix" ]]; then
+set_linux_compiler_env
+
+if [[ ${PLATFORM} == "Unix" ]]; then
 	mkdir -p travisbuild
 	cd travisbuild || exit 1
 
 	CMAKE_FLAGS=''
-	if [[ $COMPILER == "g++-6" ]]; then
-		export CC=gcc-6
-		export CXX=g++-6
-	fi
-
-	# Clang builds with FreeType fail on Travis
-	if [[ $CC == "clang" ]]; then
-		CMAKE_FLAGS+=' -DENABLE_FREETYPE=FALSE'
-	fi
 
-	if [[ $TRAVIS_OS_NAME == "osx" ]]; then
+	if [[ ${TRAVIS_OS_NAME} == "osx" ]]; then
 		CMAKE_FLAGS+=' -DCUSTOM_GETTEXT_PATH=/usr/local/opt/gettext'
 	fi
 
@@ -33,12 +26,12 @@ if [[ $PLATFORM == "Unix" ]]; then
 		-DRUN_IN_PLACE=TRUE \
 		-DENABLE_GETTEXT=TRUE \
 		-DBUILD_SERVER=TRUE \
-		$CMAKE_FLAGS ..
+		${CMAKE_FLAGS} ..
 	make -j2
 
 	echo "Running unit tests."
 	CMD="../bin/minetest --run-unittests"
-	if [[ "$VALGRIND" == "1" ]]; then
+	if [[ "${VALGRIND}" == "1" ]]; then
 		valgrind --leak-check=full --leak-check-heuristics=all --undef-value-errors=no --error-exitcode=9 ${CMD} && exit 0
 	else
 		${CMD} && exit 0