deps: allow building the deps using cmake

CMakeLists.txt

@@ -1,11 +1,14 @@
 # Setting it to a range tells it that it supports the features on the newer
 # versions as well, avoiding setting policies.
-cmake_minimum_required(VERSION 3.16...3.25)
+cmake_minimum_required(VERSION 3.5)
 
 # Enabling this cmake policy gets rid of warnings regarding LTO.
 cmake_policy(SET CMP0069 NEW)
 set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
 
+cmake_policy(SET CMP0083 NEW)
+set(CMAKE_POLICY_DEFAULT_CMP0083 NEW)
+
 if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
 	message(FATAL_ERROR "PCSX2 does not support in-tree builds.  Please make a build directory that is not the PCSX2 source directory and generate your CMake project there using either `cmake -B build_directory` or by running cmake from the build directory.")
 endif()
@@ -36,6 +39,12 @@ detect_compiler()
 #-------------------------------------------------------------------------------
 # Include specific module
 include(BuildParameters)
+
+# Build third-party dependencies
+if (BUILD_DEPENDENCIES)
+	include(BuildDependencies)
+endif()
+
 include(SearchForStuff)
 
 # Must be done after SearchForStuff

cmake/BuildDependencies.cmake

@@ -0,0 +1,76 @@
+# Build PCSX2 dependencies during the configure step.
+#
+# This is intentionally executed during CMake configure because
+# SearchForStuff.cmake uses find_package() during configure.
+
+set(PCSX2_DEPS_PREFIX "${CMAKE_BINARY_DIR}/deps" CACHE PATH
+	"Where PCSX2 dependencies are installed")
+
+set(PCSX2_DEPS_JOBS "" CACHE STRING
+	"Parallel jobs for dependency builds")
+
+set(_deps_build "${CMAKE_BINARY_DIR}/deps-build")
+
+set(_deps_args
+	-DCMAKE_INSTALL_PREFIX=${PCSX2_DEPS_PREFIX}
+)
+
+if(PCSX2_DEPS_JOBS)
+	list(APPEND _deps_args -DNPROCS=${PCSX2_DEPS_JOBS})
+endif()
+
+# Pass the parent toolchain/compiler configuration to the dependency build.
+foreach(_var
+	CMAKE_TOOLCHAIN_FILE
+	CMAKE_C_COMPILER
+	CMAKE_CXX_COMPILER
+	CMAKE_C_COMPILER_LAUNCHER
+	CMAKE_CXX_COMPILER_LAUNCHER
+	CMAKE_SYSROOT
+	CMAKE_OSX_DEPLOYMENT_TARGET
+	CMAKE_OSX_ARCHITECTURES
+	ANDROID_ABI
+	ANDROID_PLATFORM
+)
+	if(DEFINED ${_var})
+		list(APPEND _deps_args -D${_var}=${${_var}})
+	endif()
+endforeach()
+
+message(STATUS "")
+message(STATUS "Building PCSX2 dependencies into:")
+message(STATUS "  ${PCSX2_DEPS_PREFIX}")
+message(STATUS "")
+
+execute_process(
+	COMMAND ${CMAKE_COMMAND}
+		-S "${CMAKE_SOURCE_DIR}/pcsx2-deps"
+		-B "${_deps_build}"
+		-G "${CMAKE_GENERATOR}"
+		${_deps_args}
+	RESULT_VARIABLE _deps_result
+)
+
+if(NOT _deps_result EQUAL 0)
+	message(FATAL_ERROR
+		"Configuring the PCSX2 dependency build failed (${_deps_result})")
+endif()
+
+execute_process(
+	COMMAND ${CMAKE_COMMAND}
+		--build "${_deps_build}"
+		--parallel
+	RESULT_VARIABLE _deps_result
+)
+
+if(NOT _deps_result EQUAL 0)
+	message(FATAL_ERROR
+		"Building the PCSX2 dependencies failed (${_deps_result})")
+endif()
+
+# Make the freshly installed packages visible to SearchForStuff.cmake.
+list(PREPEND CMAKE_PREFIX_PATH "${PCSX2_DEPS_PREFIX}")
+
+if(CMAKE_FIND_ROOT_PATH)
+	list(PREPEND CMAKE_FIND_ROOT_PATH "${PCSX2_DEPS_PREFIX}")
+endif()

cmake/BuildParameters.cmake

@@ -14,6 +14,13 @@ option(USE_VTUNE "Plug VTUNE to profile GS JIT.")
 option(PACKAGE_MODE "Use this option to ease packaging of PCSX2 (developer/distribution option)")
 option(BUNDLE_EMOJI_FONT "Bundles Noto Color Emoji for systems whose system emoji font isn't usable by freetype" ON)
 option(POSITION_INDEPENDENT_CODE "Generate position-independent code. It is recommended that you leave this on." ON)
+option(BUILD_DEPENDENCIES "Enables building dependencies" OFF)
+
+if(BUILD_DEPENDENCIES)
+	option(BUILD_DEPENDENCIES_AS_SHARED_LIBS "Build dependencies as shared libraries" ON)
+else()
+	set(BUILD_DEPENDENCIES_AS_SHARED_LIBS OFF)
+endif()
 
 #-------------------------------------------------------------------------------
 # Graphical option

cmake/SearchForStuff.cmake

@@ -17,6 +17,14 @@ find_package(ZLIB REQUIRED) # v1.3, but Mac uses the SDK version.
 find_package(Zstd 1.5.5 REQUIRED)
 find_package(LZ4 REQUIRED)
 find_package(WebP REQUIRED) # v1.3.2, spews an error on Linux because no pkg-config.
+if((WIN32 AND NOT MSVC) OR ANDROID)
+	find_library(SHARPYUV_LIBRARY NAMES sharpyuv REQUIRED)
+else()
+	find_library(SHARPYUV_LIBRARY NAMES libsharpyuv.a sharpyuv.lib)
+	if(NOT SHARPYUV_LIBRARY AND EXISTS "${CMAKE_BINARY_DIR}/deps/lib/libsharpyuv.a")
+		set(SHARPYUV_LIBRARY "${CMAKE_BINARY_DIR}/deps/lib/libsharpyuv.a")
+	endif()
+endif()
 find_package(SDL3 3.2.6 REQUIRED)
 find_package(Freetype 2.10 REQUIRED) # 2.10 is the first with COLRv0 support, which we need for rendering emoji
 find_package(plutovg 1.1.0 REQUIRED)

common/CMakeLists.txt

@@ -214,6 +214,10 @@ target_link_libraries(common PUBLIC
 	ryml::ryml
 )
 
+if(TARGET WebP::libwebp AND SHARPYUV_LIBRARY)
+	target_link_libraries(common PRIVATE ${SHARPYUV_LIBRARY})
+endif()
+
 fixup_file_properties(common)
 target_compile_features(common PUBLIC cxx_std_17)
 target_include_directories(common PUBLIC ../3rdparty/include ../)