Preparations for port on iOS

.github/BUILDING.md

@@ -18,6 +18,10 @@ sudo dnf install cmake libunwind-devel glfw-devel vulkan-devel gcc-c++ gcc sox-d
 sudo pacman -S libunwind glfw-x11 vulkan-devel sox git cmake alsa-lib nasm
 ```
 
+### The dependencies for MacOS (iOS target, rpcs3 only):
+
+macOS 15, Xcode 16 (with iOS workload) and Cmake 3.20+
+
 ## Cloning the Repo
 
 ```
@@ -34,3 +38,10 @@ For Ubuntu 24.04 you need to manually specify compiler version:
 ```
 cmake -B build -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS_INIT="-march=native" -DCMAKE_CXX_COMPILER=g++-14 && cmake --build build -j$(nproc)
 ```
+
+For iOS you need to manually specify the compiler and toolchain file:
+
+```
+cmake -B build -G Xcode -DCMAKE_TOOLCHAIN_FILE=ios/ios.toolchain.cmake -DPLATFORM=OS64 -DCMAKE_POLICY_VERSION_MINIMUM=3.20
+cmake --build build --config Release
+```

.github/workflows/rpcsx.yml

@@ -24,7 +24,7 @@ jobs:
         sudo apt update
         sudo apt install -y cmake build-essential libunwind-dev \
           libvulkan-dev vulkan-validationlayers \
-          libsox-dev g++-14 ninja-build libasound2-dev libglfw3-dev nasm libudev-dev
+          libsox-dev g++-14 ninja-build libasound2-dev libglfw3-dev nasm libudev-dev libusb-1.0-0-dev
         cmake -B build -G "Ninja" -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_COMPILER=g++-14 -DCMAKE_INSTALL_PREFIX=/usr
         cmake --build build -j$(($(nproc) + 2))
         sudo cmake --build build
@@ -90,6 +90,11 @@ jobs:
         sudo apt update
         sudo apt install ninja-build
 
+    - name: Install libusb
+      run: |
+        sudo apt-get update 
+        sudo apt-get install -y libusb-1.0-0-dev
+
     - name: Setup Android SDK
       uses: android-actions/setup-android@v3
 

3rdparty/CMakeLists.txt

@@ -135,7 +135,9 @@ endif()
 
 
 # libusb
-if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	message(STATUS "Skip libusb on iOS")
+elseif(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
 	pkg_check_modules(LIBUSB REQUIRED IMPORTED_TARGET libusb-1.0>=1.0 )
 	cmake_dependent_option(USE_SYSTEM_LIBUSB "Use system libusb-1.0 as shared library" ON
 			"LIBUSB_FOUND" OFF)
@@ -144,7 +146,9 @@ else()
 	cmake_dependent_option(USE_SYSTEM_LIBUSB "Use system libusb-1.0 as shared library" OFF
 			"LIBUSB_FOUND" OFF)
 endif()
-if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	message(STATUS "Skip libusb on iOS")
+elseif(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
 	# Always use system libusb as reference implementation isn't supported
 	add_library(usb-1.0-shared INTERFACE)
 	target_link_libraries(usb-1.0-shared INTERFACE PkgConfig::LIBUSB)
@@ -168,9 +172,13 @@ else()
 	endif()
 endif()
 
-
 # hidapi
-add_subdirectory(hidapi)
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	add_library(3rdparty_hidapi INTERFACE)
+else()
+	add_subdirectory(hidapi)
+endif()
+
 
 # glslang
 add_library(3rdparty_glslang INTERFACE)
@@ -182,8 +190,7 @@ add_subdirectory(yaml-cpp)
 
 
 # OpenGL
-
-if (NOT ANDROID AND NOT WITHOUT_OPENGL)
+if (NOT ANDROID AND NOT WITHOUT_OPENGL AND NOT CMAKE_SYSTEM_NAME MATCHES "iOS")
 	find_package(OpenGL REQUIRED OPTIONAL_COMPONENTS EGL)
 
 	add_library(3rdparty_opengl INTERFACE)
@@ -209,7 +216,11 @@ endif()
 add_subdirectory(stblib)
 
 # Cubeb
-add_subdirectory(cubeb EXCLUDE_FROM_ALL)
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	add_library(3rdparty_cubeb INTERFACE)
+else()
+	add_subdirectory(cubeb EXCLUDE_FROM_ALL)
+endif()
 
 # SoundTouch
 add_subdirectory(SoundTouch EXCLUDE_FROM_ALL)
@@ -387,9 +398,10 @@ add_subdirectory(opencv EXCLUDE_FROM_ALL)
 # FUSION
 add_subdirectory(fusion EXCLUDE_FROM_ALL)
 
-
 # add nice ALIAS targets for ease of use
-if(USE_SYSTEM_LIBUSB)
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	message(STATUS "Skip libusb on iOS")
+elseif(USE_SYSTEM_LIBUSB)
 	add_library(3rdparty::libusb ALIAS usb-1.0-shared)
 else()
 	add_library(3rdparty::libusb ALIAS usb-1.0-static)

3rdparty/MoltenVK/CMakeLists.txt

@@ -1,14 +1,29 @@
+cmake_minimum_required(VERSION 3.20)
 project(moltenvk NONE)
 include(ExternalProject)
 
-ExternalProject_Add(moltenvk
-	GIT_REPOSITORY https://github.com/KhronosGroup/MoltenVK.git
-	GIT_TAG 81541f6
-	BUILD_IN_SOURCE 1
-	SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK
-	CONFIGURE_COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/fetchDependencies" --macos
-	BUILD_COMMAND xcodebuild build -quiet -project "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVKPackaging.xcodeproj" -scheme "MoltenVK Package \(macOS only\)" -configuration "Release" -arch "${CMAKE_HOST_SYSTEM_PROCESSOR}"
-	COMMAND ln -f "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/dylib/macOS/libMoltenVK.dylib" "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/Build/Products/Release/dynamic/libMoltenVK.dylib"
-	INSTALL_COMMAND ""
-	BUILD_BYPRODUCTS "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/Build/Products/Release/dynamic/libMoltenVK.dylib"
-)
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+	ExternalProject_Add(moltenvk
+		GIT_REPOSITORY https://github.com/KhronosGroup/MoltenVK.git
+		GIT_TAG 6f892b6
+		BUILD_IN_SOURCE YES
+		SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK
+		CONFIGURE_COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/fetchDependencies" --ios
+		BUILD_COMMAND xcodebuild build -quiet -project "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVKPackaging.xcodeproj" -scheme "MoltenVK Package \(iOS only\)" -configuration "Release" -arch "arm64"
+		COMMAND ""
+		INSTALL_COMMAND ""
+		BUILD_BYPRODUCTS ""
+	)
+else()
+	ExternalProject_Add(moltenvk
+		GIT_REPOSITORY https://github.com/KhronosGroup/MoltenVK.git
+		GIT_TAG 81541f6
+		BUILD_IN_SOURCE 1
+		SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK
+		CONFIGURE_COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/fetchDependencies" --macos
+		BUILD_COMMAND xcodebuild build -quiet -project "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVKPackaging.xcodeproj" -scheme "MoltenVK Package \(macOS only\)" -configuration "Release" -arch "${CMAKE_HOST_SYSTEM_PROCESSOR}"
+		COMMAND ln -f "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/dylib/macOS/libMoltenVK.dylib" "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/Build/Products/Release/dynamic/libMoltenVK.dylib"
+		INSTALL_COMMAND ""
+		BUILD_BYPRODUCTS "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/Build/Products/Release/dynamic/libMoltenVK.dylib"
+	)
+endif()

3rdparty/asmjit/CMakeLists.txt

@@ -17,3 +17,7 @@ target_link_libraries(asmjit PRIVATE ${ASMJIT_DEPS})
 
 set_property(TARGET asmjit PROPERTY FOLDER "3rdparty/")
 add_library(3rdparty::asmjit ALIAS asmjit)
+
+if(CMAKE_SYSTEM_NAME MATCHES "iOS")
+	target_compile_options(asmjit PRIVATE -DASMJIT_NO_JIT)
+endif()

CMakeLists.txt

@@ -29,6 +29,32 @@ option(USE_SYSTEM_OPENCV "Prefer system OpenCV instead of the builtin one" ON)
 option(HAS_MEMORY_BREAKPOINTS "Add support for memory breakpoints to the interpreter" OFF)
 option(USE_LTO "Use LTO for building" ON)
 
+# use global cmake to build rpcs3 for iOS at the moment
+if (CMAKE_SYSTEM_NAME MATCHES "iOS")
+    set(WITH_RPCSX off)
+    set(WITH_RPCS3 on)
+    set(USE_SYSTEM_CURL off)
+    set(USE_DISCORD_RPC off)
+    set(USE_SYSTEM_OPENCV off)
+    set(USE_SYSTEM_FFMPEG off)
+    set(USE_FAUDIO off)
+    set(USE_SDL2 off)
+    set(WITH_LLVM off)
+    set(BUILD_LLVM off)
+    set(STATIC_LINK_LLVM off)
+    set(DISABLE_LTO on)
+    set(USE_LTO off)
+    set(USE_OPENSL off)
+    set(ASMJIT_NO_SHM_OPEN on)
+    set(USE_SYSTEM_ZLIB off)
+    set(USE_LIBEVDEV off)
+    set(COMPILE_FFMPEG on)
+    set(WITHOUT_OPENGL on)
+    set(WITHOUT_OPENGLEW on)
+    set(WITHOUT_OPENAL on)
+    set(USE_SYSTEM_SDL off)
+    set(USE_SYSTEM_MVK off)
+endif()
 
 if (NOT WITH_RPCS3)
     set(WITHOUT_OPENGL on)