CMake: Add option to enable/disable Vulkan video backend

CMakeLists.txt

@@ -35,6 +35,7 @@ option(ENABLE_ALSA "Enables ALSA sound backend" ON)
 option(ENABLE_PULSEAUDIO "Enables PulseAudio sound backend" ON)
 option(ENABLE_LLVM "Enables LLVM support, for disassembly" ON)
 option(ENABLE_TESTS "Enables building the unit tests" ON)
+option(ENABLE_VULKAN "Enables vulkan video backend" ON)
 option(USE_DISCORD_PRESENCE "Enables Discord Rich Presence, show the current game on Discord" ON)
 
 # Maintainers: if you consider blanket disabling this for your users, please
@@ -543,6 +544,7 @@ if (_M_X86)
   add_subdirectory(Externals/Bochs_disasm)
 endif()
 add_subdirectory(Externals/cpp-optparse)
+
 find_package(fmt 6.0)
 if(fmt_FOUND)
   message(STATUS "Using shared fmt ${fmt_VERSION}")
@@ -551,8 +553,12 @@ else()
   message(STATUS "Using static fmt from Externals")
   add_subdirectory(Externals/fmt EXCLUDE_FROM_ALL)
 endif()
-add_subdirectory(Externals/glslang)
 add_subdirectory(Externals/imgui)
+add_subdirectory(Externals/glslang)
+
+if(ENABLE_VULKAN)
+  add_definitions(-DUSE_VULKAN)
+endif()
 
 find_package(pugixml)
 if(NOT pugixml_FOUND)

Source/Core/Core/CMakeLists.txt

@@ -563,7 +563,6 @@ PUBLIC
   videonull
   videoogl
   videosoftware
-  videovulkan
 
 PRIVATE
   fmt::fmt
@@ -601,6 +600,10 @@ if(LIBUSB_FOUND)
   )
 endif()
 
+if(ENABLE_VULKAN)
+  target_link_libraries(core PUBLIC videovulkan)
+endif()
+
 if(WIN32)
   target_sources(core PRIVATE
     HW/EXI/BBA/TAP_Win32.cpp

Source/Core/VideoBackends/CMakeLists.txt

@@ -1,7 +1,6 @@
 add_subdirectory(OGL)
 add_subdirectory(Null)
 add_subdirectory(Software)
-add_subdirectory(Vulkan)
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
   add_subdirectory(D3DCommon)
@@ -9,3 +8,6 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
   add_subdirectory(D3D12)
 endif()
 
+if(ENABLE_VULKAN)
+  add_subdirectory(Vulkan)
+endif()

Source/Core/VideoCommon/VideoBackendBase.cpp

@@ -225,7 +225,9 @@ const std::vector<std::unique_ptr<VideoBackendBase>>& VideoBackendBase::GetAvail
     backends.push_back(std::make_unique<DX11::VideoBackend>());
     backends.push_back(std::make_unique<DX12::VideoBackend>());
 #endif
+#ifdef USE_VULKAN
     backends.push_back(std::make_unique<Vulkan::VideoBackend>());
+#endif
 #ifdef HAS_OPENGL
     backends.push_back(std::make_unique<SW::VideoSoftware>());
 #endif