CMake: Refactor CMake build (#5032)

* CMake: Refactor build to multiple libraries

- Refactor CMake build system by creating separate libraries for
  different components
- Create interface libraries for most dependencies and add 3rdparty::*
  ALIAS targets for ease of use and use them to try specifying correct
  dependencies for each target
- Prefer 3rdparty:: ALIAS when linking dependencies
- Exclude xxHash subdirectory from ALL build target
- Add USE_SYSTEM_ZLIB option to select between using included ZLib and
  the ZLib in CMake search path

* Add cstring include to Log.cpp

* CMake: Add 3rdparty::glew interface target

* Add Visual Studio CMakeSettings.json to gitignore

* CMake: Move building and finding LLVM to 3rdparty/llvm.cmake script

- LLVM is now built under 3rdparty/ directory in the binary directory

* CMake: Move finding Qt5 to 3rdparty/qt5.cmake script

- Script has to be included in rpcs3/CMakeLists.txt because it defines
  Qt5::moc target which isn't available in that folder if it is
  included in 3rdparty directory
- Set AUTOMOC and AUTOUIC properties for targets requiring them (rpcs3
  and rpcs3_ui) instead of setting CMAKE_AUTOMOC and CMAKE_AUTOUIC so
  those properties are not defined for all targets under rpcs3 dir

* CMake: Remove redundant code from rpcs3/CMakeLists.txt

* CMake: Add BUILD_LLVM_SUBMODULE option instead of hardcoded check

- Add BUILD_LLVM_SUBMODULE option (defaults to ON) to allow controlling
  usage of the LLVM submodule.
- Move option definitions to root CMakeLists

* CMake: Remove separate Emu subtargets

- Based on discussion in pull request #5032, I decided to combine
  subtargets under Emu folder back to a single rpcs3_emu target

* CMake: Remove utilities, loader and crypto targets: merge them to Emu

- Removed separate targets and merged them into rpcs3_emu target as
  recommended in pull request (#5032) conversations. Separating targets
  probably later in a separate pull request

* Fix relative includes in pad_thread.cpp

* Fix Travis-CI cloning all submodules needlessly

CMakeLists.txt

@@ -1,17 +1,30 @@
 cmake_minimum_required(VERSION 3.8.2)
 
+project(rpcs3)
+
 option(WITH_GDB "WITH_GDB" OFF)
-option(WITHOUT_LLVM "WITHOUT_LLVM" OFF)
 option(USE_NATIVE_INSTRUCTIONS "USE_NATIVE_INSTRUCTIONS makes rpcs3 compile with -march=native, which is useful for local builds, but not good for packages." ON)
 
+option(WITH_LLVM "Enable usage of LLVM library" ON)
+option(BUILD_LLVM_SUBMODULE "Build LLVM from git submodule" ON)
+
+option(USE_ALSA "ALSA audio backend" ON)
+option(USE_PULSE "PulseAudio audio backend" ON)
+option(USE_LIBEVDEV "libevdev-based joystick support" ON)
+
+option(USE_SYSTEM_ZLIB "Prefer system ZLIB instead of the builtin one" ON)
+
+option(USE_VULKAN "Vulkan render backend" ON)
+
+set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/rpcs3/cmake_modules")
+
+set(CMAKE_CXX_STANDARD 17)
+include(CheckCXXCompilerFlag)
+
 if (WITH_GDB)
 	add_definitions(-DWITH_GDB_DEBUGGER)
 endif()
 
-set(ASMJIT_EMBED TRUE)
-set(ASMJIT_DIR "${CMAKE_CURRENT_LIST_DIR}/asmjit" CACHE PATH "Location of 'asmjit'")
-include("${ASMJIT_DIR}/CMakeLists.txt")
-
 if (NOT CMAKE_BUILD_TYPE)
 	message(STATUS "No build type selected, default to Release")
 	set(CMAKE_BUILD_TYPE "Release")
@@ -27,50 +40,18 @@ if (CCACHE_FOUND)
 	set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
 endif()
 
-find_package(ZLIB QUIET)
-if (NOT ZLIB_FOUND)
-    add_subdirectory(3rdparty/zlib EXCLUDE_FROM_ALL)
-    set(ZLIB_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/zlib" "${CMAKE_CURRENT_BINARY_DIR}/3rdparty/zlib" CACHE INTERNAL "")
-    set(ZLIB_LIBRARY zlibstatic)
+if(WIN32)
+	add_definitions(-DUNICODE)
+	add_definitions(-D_WIN32_WINNT=0x0602)
 endif()
 
-# Select the version of libpng to use, default is builtin
-if (NOT USE_SYSTEM_LIBPNG)
-	# We use libpng's static library and don't need to build the shared library and run the tests
-	set(PNG_SHARED OFF CACHE BOOL "Build shared lib" FORCE)
-	set(PNG_TESTS OFF CACHE BOOL "Build libpng tests" FORCE)
-	set(SKIP_INSTALL_ALL ON)
-	add_subdirectory(3rdparty/libpng EXCLUDE_FROM_ALL)
-endif()
-
-add_subdirectory(3rdparty/pugixml EXCLUDE_FROM_ALL)
+add_subdirectory(Vulkan EXCLUDE_FROM_ALL)
+add_subdirectory(asmjitsrc EXCLUDE_FROM_ALL)
+add_subdirectory(3rdparty)
 
 # TODO: do real installation, including copying directory structure
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE "${PROJECT_BINARY_DIR}/bin")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "${PROJECT_BINARY_DIR}/bin")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO "${PROJECT_BINARY_DIR}/bin")
 
-add_subdirectory(Vulkan EXCLUDE_FROM_ALL)
 add_subdirectory(rpcs3)
-
-include_directories(3rdparty/hidapi/hidapi)
-if(APPLE)
-	add_subdirectory(3rdparty/hidapi/mac EXCLUDE_FROM_ALL)
-	#list(APPEND LIBS hidapi)
-elseif(CMAKE_SYSTEM MATCHES "Linux")
-	add_subdirectory(3rdparty/hidapi/linux EXCLUDE_FROM_ALL)
-elseif(WIN32)
-	add_subdirectory(3rdparty/hidapi/windows EXCLUDE_FROM_ALL)
-else()
-	add_subdirectory(3rdparty/hidapi/libusb EXCLUDE_FROM_ALL)
-	#list(APPEND LIBS hidapi-libusb)
-endif()
-
-set(YAML_CPP_BUILD_TESTS OFF CACHE BOOL "Enable testing" FORCE)
-set(YAML_CPP_BUILD_TOOLS OFF CACHE BOOL "Enable parse tools" FORCE)
-set(YAML_CPP_BUILD_CONTRIB OFF CACHE BOOL "Enable contrib stuff in library" FORCE)
-add_subdirectory(3rdparty/yaml-cpp EXCLUDE_FROM_ALL)
-
-set(XXHASH_BUNDLED_MODE ON)
-set(BUILD_SHARED_LIBS OFF CACHE BOOL "Make xxHash build static libs")
-add_subdirectory(3rdparty/xxHash/cmake_unofficial)