[cmake] more modules, general "cleanup" (#3126)

Successor to that old MoltenVK PR. Does a lot of cleanups within root CMakeLists.txt, hands over MoltenVK and VulkanValidationLayers to CPMUtil, and separates out common operations into my modules.

Hopefully reduces the monstrosity that is root CMakeLists.txt. Please test:

- builds on all platforms
- VulkanValidationLayers

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3126
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/dynarmic/CMakeLists.txt

@@ -33,12 +33,6 @@ option(DYNARMIC_INSTALL "Install dynarmic headers and CMake files" OFF)
 option(DYNARMIC_USE_BUNDLED_EXTERNALS "Use all bundled externals (useful when e.g. cross-compiling)" OFF)
 option(DYNARMIC_ENABLE_LTO "Enable LTO" OFF)
 
-# Default to a Release build
-if (NOT CMAKE_BUILD_TYPE)
-    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." FORCE)
-    message(STATUS "Defaulting to a Release build")
-endif()
-
 # Set hard requirements for C++
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -54,12 +48,6 @@ endif()
 # Add the module directory to the list of paths
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules")
 
-# Arch detection
-if (NOT DEFINED ARCHITECTURE)
-    message(FATAL_ERROR "Unsupported architecture encountered. Ending CMake generation.")
-endif()
-message(STATUS "Target architecture: ${ARCHITECTURE}")
-
 # Compiler flags
 if (MSVC)
     set(DYNARMIC_CXX_FLAGS
@@ -119,7 +107,7 @@ else()
 endif()
 
 find_package(Boost 1.57 REQUIRED)
-find_package(fmt 9 CONFIG)
+find_package(fmt 8 CONFIG)
 
 # Pull in externals CMakeLists for libs where available
 add_subdirectory(externals)

src/dynarmic/CMakeModules/TargetArchitectureSpecificSources.cmake

@@ -1,5 +1,8 @@
+# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 function(target_architecture_specific_sources project arch)
-    if (NOT DYNARMIC_MULTIARCH_BUILD)
+    if (NOT MULTIARCH_BUILD)
         target_sources("${project}" PRIVATE ${ARGN})
         return()
     endif()

src/dynarmic/tests/CMakeLists.txt

@@ -56,7 +56,7 @@ if ("x86_64" IN_LIST ARCHITECTURE)
         native/preserve_xmm.cpp
     )
 
-    if (NOT MSVC AND NOT DYNARMIC_MULTIARCH_BUILD)
+    if (NOT MSVC AND NOT MULTIARCH_BUILD)
         target_sources(dynarmic_tests PRIVATE
             rsqrt_test.cpp
             rsqrt_test_fn.s

src/yuzu/CMakeLists.txt

@@ -375,12 +375,6 @@ if (APPLE)
     set_target_properties(yuzu PROPERTIES MACOSX_BUNDLE TRUE)
     set_target_properties(yuzu PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/Info.plist)
 
-    if (YUZU_USE_BUNDLED_MOLTENVK)
-        set(MOLTENVK_PLATFORM "macOS")
-        set(MOLTENVK_VERSION "v1.4.0")
-        download_moltenvk(${MOLTENVK_PLATFORM} ${MOLTENVK_VERSION})
-    endif()
-
     set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib")
     find_library(MOLTENVK_LIBRARY MoltenVK REQUIRED)
     message(STATUS "Using MoltenVK at ${MOLTENVK_LIBRARY}.")