BUILD: a couple of cmake msvc compile fixes (#10799)

* cmake: a couple of msvc compile fixes

Throw error when using multi-config generators.
Add USE_MSVC_STATIC_CRT option for statically linking with CRT.
Set curl's CURL_STATIC_CRT aligned with USE_MSVC_STATIC_CRT.
Fix cmake configs of 7z and OpenAL in msvc build.
Remove unecessary hard coded compiling and linking flags.
Use debug option in windeployqt when configuring for a debug build.
Search for windeployqt tool in configure time.
Add vcpkg's Qt support.

* Fix some typos

CMakeLists.txt

@@ -28,17 +28,64 @@ set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/buildfiles/cmake")
 
 include(CheckCXXCompilerFlag)
 
+# TODO(cjj19970505@live.cn)
+# Currently cmake config scripts are single-config generator only.
+get_property(IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(IS_MULTI_CONFIG)
+    message(FATAL_ERROR "Multi-config generators are not supported.")
+endif()
+
 if(NOT CMAKE_BUILD_TYPE)
     message(STATUS "No build type selected, default to Release")
     set(CMAKE_BUILD_TYPE "Release")
 endif()
 
-if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
-    add_definitions(-DNDEBUG)
-elseif(NOT MSVC)
+if(CMAKE_BUILD_TYPE MATCHES "Debug" AND NOT MSVC)
     add_definitions(-D_DEBUG)
 endif()
 
+if(MSVC)
+    option(USE_MSVC_STATIC_CRT "Use static MSVC C runtime" OFF)
+
+    # TODO(cjj19970505@live.cno)
+    # DiscordRPC binary in 3rdparty is compiled /MT
+    # So theoretically we should enable DiscordRPC in Release and static CRT build
+    # since we might encounter some rumtime issues when more than one CRT version are presented.
+    # https://docs.microsoft.com/en-us/cpp/c-runtime-library/crt-library-features?view=msvc-160#what-problems-exist-if-an-application-uses-more-than-one-crt-version
+    # Add other DiscordRPC binaries(compiled with /MTd, /MD, /MDd) or compile it from source may address this issue.
+    if(NOT(CMAKE_BUILD_TYPE MATCHES "Release" AND USE_MSVC_STATIC_CRT))
+        set(USE_DISCORD_RPC OFF CACHE BOOL "Discord RPC is only available in Release and static CRT build." FORCE)
+    endif()
+    
+    if(USE_MSVC_STATIC_CRT)
+        set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+    else()
+        # though doc ( https://cmake.org/cmake/help/latest/variable/CMAKE_MSVC_RUNTIME_LIBRARY.html )
+        # says if that property is not set then CMake uses the default value MultiThreaded$<$<CONFIG:Debug>:Debug>DLL 
+        # to select a MSVC runtime library.
+        # But yaml-cpp set /MT(d) if CMAKE_MSVC_RUNTIME_LIBRARY is undefined
+        # So we have to define it explicitly
+        set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+    endif()
+
+    # TODO(cjj19970505@live.cn)
+    # offical QT uses dynamic CRT.
+    # When building our lib with static CRT and debug build type
+    # and linking with Qt with dynmaic CRT and debug build, 
+    # error is encountered in runtime (which is expected). 
+    # But building our lib with static CRT and release build type, 
+    # and linking with Qt with dynamic CRT and release build seems to be working, 
+    # which is the same config with VS solution.
+    # (though technically it might still have some hidden errors).
+    # So we allow static CRT in both relase and debug build, but prompt warning in debug build.
+    # For more info:
+    # https://docs.microsoft.com/en-us/cpp/c-runtime-library/crt-library-features?view=msvc-160#what-problems-exist-if-an-application-uses-more-than-one-crt-version
+    # https://wiki.qt.io/Technical_FAQ#Why_does_a_statically_built_Qt_use_the_dynamic_Visual_Studio_runtime_libraries_.3F_Do_I_need_to_deploy_those_with_my_application_.3F
+    if(USE_MSVC_STATIC_CRT AND CMAKE_BUILD_TYPE MATCHES "Debug")
+        message(AUTHOR_WARNING "Debug build currently can not work with static CRT.")
+    endif()
+endif()
+
 if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
     message( FATAL_ERROR "RPCS3 can only be compiled on 64-bit platforms." )
 endif()