[cmake] refactor: Use CPM over submodules (#143)

Transfers the majority of submodules and large externals to CPM, using source archives rather than full Git clones. Not only does this save massive amounts of clone and configure time, but dependencies are grabbed on-demand rather than being required by default. Additionally, CPM will (generally) automatically search for system dependencies, though certain dependencies have options to control this.

Testing shows gains ranging from 5x to 10x in terms of overall clone/configure time.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/143
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/dynarmic/CMakeModules/CreateDirectoryGroups.cmake

@@ -0,0 +1,17 @@
+# This function should be passed a name of an existing target. It will automatically generate
+# file groups following the directory hierarchy, so that the layout of the files in IDEs matches the
+# one in the filesystem.
+function(create_target_directory_groups target_name)
+    # Place any files that aren't in the source list in a separate group so that they don't get in
+    # the way.
+    source_group("Other Files" REGULAR_EXPRESSION ".")
+
+    get_target_property(target_sources "${target_name}" SOURCES)
+
+    foreach(file_name IN LISTS target_sources)
+        get_filename_component(dir_name "${file_name}" PATH)
+        # Group names use '\' as a separator even though the entire rest of CMake uses '/'...
+        string(REPLACE "/" "\\" group_name "${dir_name}")
+        source_group("${group_name}" FILES "${file_name}")
+    endforeach()
+endfunction()

src/dynarmic/CMakeModules/DetectArchitecture.cmake

@@ -0,0 +1,62 @@
+include(CheckSymbolExists)
+
+if (CMAKE_OSX_ARCHITECTURES)
+    set(DYNARMIC_MULTIARCH_BUILD 1)
+    set(ARCHITECTURE "${CMAKE_OSX_ARCHITECTURES}")
+    return()
+endif()
+
+function(detect_architecture symbol arch)
+    if (NOT DEFINED ARCHITECTURE)
+        set(CMAKE_REQUIRED_QUIET YES)
+        check_symbol_exists("${symbol}" "" DETECT_ARCHITECTURE_${arch})
+        unset(CMAKE_REQUIRED_QUIET)
+
+        if (DETECT_ARCHITECTURE_${arch})
+            set(ARCHITECTURE "${arch}" PARENT_SCOPE)
+        endif()
+
+        unset(DETECT_ARCHITECTURE_${arch} CACHE)
+    endif()
+endfunction()
+
+detect_architecture("__ARM64__" arm64)
+detect_architecture("__aarch64__" arm64)
+detect_architecture("_M_ARM64" arm64)
+
+detect_architecture("__arm__" arm)
+detect_architecture("__TARGET_ARCH_ARM" arm)
+detect_architecture("_M_ARM" arm)
+
+detect_architecture("__x86_64" x86_64)
+detect_architecture("__x86_64__" x86_64)
+detect_architecture("__amd64" x86_64)
+detect_architecture("_M_X64" x86_64)
+
+detect_architecture("__i386" x86)
+detect_architecture("__i386__" x86)
+detect_architecture("_M_IX86" x86)
+
+detect_architecture("__ia64" ia64)
+detect_architecture("__ia64__" ia64)
+detect_architecture("_M_IA64" ia64)
+
+detect_architecture("__mips" mips)
+detect_architecture("__mips__" mips)
+detect_architecture("_M_MRX000" mips)
+
+detect_architecture("__ppc64__" ppc64)
+detect_architecture("__powerpc64__" ppc64)
+
+detect_architecture("__ppc__" ppc)
+detect_architecture("__ppc" ppc)
+detect_architecture("__powerpc__" ppc)
+detect_architecture("_ARCH_COM" ppc)
+detect_architecture("_ARCH_PWR" ppc)
+detect_architecture("_ARCH_PPC" ppc)
+detect_architecture("_M_MPPC" ppc)
+detect_architecture("_M_PPC" ppc)
+
+detect_architecture("__riscv" riscv)
+
+detect_architecture("__EMSCRIPTEN__" wasm)

src/dynarmic/CMakeModules/FindUnicorn.cmake

@@ -0,0 +1,37 @@
+# Exports:
+#
+# Variables:
+#  LIBUNICORN_FOUND
+#  LIBUNICORN_INCLUDE_DIR
+#  LIBUNICORN_LIBRARY
+#
+# Target:
+#  Unicorn::Unicorn
+#
+
+find_path(LIBUNICORN_INCLUDE_DIR
+          unicorn/unicorn.h
+          HINTS $ENV{UNICORNDIR}
+          PATH_SUFFIXES include)
+
+find_library(LIBUNICORN_LIBRARY
+             NAMES unicorn
+             HINTS $ENV{UNICORNDIR})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Unicorn DEFAULT_MSG LIBUNICORN_LIBRARY LIBUNICORN_INCLUDE_DIR)
+
+if (UNICORN_FOUND)
+    set(THREADS_PREFER_PTHREAD_FLAG ON)
+    find_package(Threads REQUIRED)
+    unset(THREADS_PREFER_PTHREAD_FLAG)
+
+    add_library(Unicorn::Unicorn UNKNOWN IMPORTED)
+    set_target_properties(Unicorn::Unicorn PROPERTIES
+        IMPORTED_LOCATION ${LIBUNICORN_LIBRARY}
+        INTERFACE_INCLUDE_DIRECTORIES ${LIBUNICORN_INCLUDE_DIR}
+        INTERFACE_LINK_LIBRARIES Threads::Threads
+    )
+endif()
+
+mark_as_advanced(LIBUNICORN_INCLUDE_DIR LIBUNICORN_LIBRARY)

src/dynarmic/CMakeModules/TargetArchitectureSpecificSources.cmake

@@ -0,0 +1,26 @@
+function(target_architecture_specific_sources project arch)
+    if (NOT DYNARMIC_MULTIARCH_BUILD)
+        target_sources("${project}" PRIVATE ${ARGN})
+        return()
+    endif()
+
+    foreach(input_file IN LISTS ARGN)
+        if(input_file MATCHES ".cpp$")
+            if(NOT IS_ABSOLUTE ${input_file})
+                set(input_file "${CMAKE_CURRENT_SOURCE_DIR}/${input_file}")
+            endif()
+
+            set(output_file "${CMAKE_CURRENT_BINARY_DIR}/arch_gen/${input_file}")
+            add_custom_command(
+                OUTPUT "${output_file}"
+                COMMAND ${CMAKE_COMMAND} "-Darch=${arch}"
+                                         "-Dinput_file=${input_file}"
+                                         "-Doutput_file=${output_file}"
+                                         -P "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/impl/TargetArchitectureSpecificSourcesWrapFile.cmake"
+                DEPENDS "${input_file}"
+                VERBATIM
+            )
+            target_sources(${project} PRIVATE "${output_file}")
+        endif()
+    endforeach()
+endfunction()

src/dynarmic/CMakeModules/dynarmicConfig.cmake.in

@@ -0,0 +1,33 @@
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+
+set(ARCHITECTURE "@ARCHITECTURE@")
+
+if (NOT @BUILD_SHARED_LIBS@)
+    find_dependency(Boost 1.57)
+    find_dependency(fmt 9)
+    find_dependency(mcl 0.1.12 EXACT)
+    find_dependency(unordered_dense)
+
+    if ("arm64" IN_LIST ARCHITECTURE)
+        find_dependency(oaknut 2.0.1)
+    endif()
+
+    if ("riscv" IN_LIST ARCHITECTURE)
+        find_dependency(biscuit 0.9.1)
+    endif()
+
+    if ("x86_64" IN_LIST ARCHITECTURE)
+        find_dependency(xbyak 7)
+        find_dependency(Zydis 4)
+    endif()
+
+    if (@DYNARMIC_USE_LLVM@)
+        find_dependency(LLVM)
+    endif()
+endif()
+
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
+
+check_required_components(@PROJECT_NAME@)

src/dynarmic/CMakeModules/impl/TargetArchitectureSpecificSourcesWrapFile.cmake

@@ -0,0 +1,3 @@
+string(TOUPPER "${arch}" arch)
+file(READ "${input_file}" f_contents)
+file(WRITE "${output_file}" "#include <mcl/macro/architecture.hpp>\n#if defined(MCL_ARCHITECTURE_${arch})\n${f_contents}\n#endif\n")