remove toolchain file + remove multibuild thingy

externals/ffmpeg/CMakeLists.txt

@@ -44,6 +44,7 @@ if (NOT YUZU_USE_BUNDLED_FFMPEG)
             --extra-ldflags="-miphoneos-version-min=16.0"
             --install-name-dir='@rpath'
             --disable-audiotoolbox
+            --disable-videotoolbox
         )
         set(FFmpeg_IS_CROSS_COMPILING TRUE)
     # User attempts to do a FFmpeg cross compilation because...

src/dynarmic/CMakeModules/TargetArchitectureSpecificSources.cmake

@@ -1,29 +0,0 @@
-# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-function(target_architecture_specific_sources project arch)
-    if (NOT 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/src/dynarmic/CMakeLists.txt

@@ -1,6 +1,5 @@
 # SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
-include(TargetArchitectureSpecificSources)
 
 add_library(dynarmic STATIC
     mcl/bit.hpp
@@ -143,7 +142,7 @@ if ("x86_64" IN_LIST ARCHITECTURE)
     target_compile_definitions(dynarmic PRIVATE XBYAK_OLD_DISP_CHECK=1)
     target_link_libraries(dynarmic PRIVATE xbyak::xbyak)
 
-    target_architecture_specific_sources(dynarmic "x86_64"
+    target_sources(dynarmic PRIVATE
         backend/x64/abi.cpp
         backend/x64/abi.h
         backend/x64/block_of_code.cpp
@@ -204,7 +203,7 @@ endif()
 if ("arm64" IN_LIST ARCHITECTURE)
     target_link_libraries(dynarmic PRIVATE merry::oaknut)
 
-    target_architecture_specific_sources(dynarmic "arm64"
+    target_sources(dynarmic PRIVATE
         backend/arm64/a32_jitstate.cpp
         backend/arm64/a32_jitstate.h
         backend/arm64/a64_jitstate.h

src/dynarmic/tests/CMakeLists.txt

@@ -1,6 +1,5 @@
 # SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
-include(TargetArchitectureSpecificSources)
 
 add_executable(dynarmic_tests
     fp/FPToFixed.cpp
@@ -50,7 +49,7 @@ endif()
 
 if ("x86_64" IN_LIST ARCHITECTURE)
     target_link_libraries(dynarmic_tests PRIVATE xbyak::xbyak)
-    target_architecture_specific_sources(dynarmic_tests "x86_64"
+    target_sources(dynarmic PRIVATE
         x64_cpu_info.cpp
         native/preserve_xmm.cpp
     )