2026-09-28 14:38:09

Signed-off-by: lizzie <lizzie@eden-emu.dev>

externals/ffmpeg/CMakeLists.txt

@@ -11,110 +11,149 @@ set(FFmpeg_HWACCEL_LDFLAGS)
 
 if (NOT YUZU_USE_BUNDLED_FFMPEG)
     set(FFmpeg_CROSS_COMPILE_FLAGS "")
-    if (ANDROID)
+    if (CMAKE_CROSSCOMPILING)
+        message(STATUS "ffmpeg: Enabling cross compilation ${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_PROCESSOR}")
         # TODO: Maybe use CMAKE_SYSROOT? and probably provide a toolchain file for android
         # I mean isn't that the "proper" way anyways?
-        string(TOLOWER "${CMAKE_HOST_SYSTEM_NAME}" FFmpeg_HOST_SYSTEM_NAME)
-        set(TOOLCHAIN "${ANDROID_NDK}/toolchains/llvm/prebuilt/${FFmpeg_HOST_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_PROCESSOR}")
-        set(SYSROOT "${TOOLCHAIN}/sysroot")
-        set(FFmpeg_CPU "armv8-a")
-        list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
-            --enable-cross-compile
-            --arch=arm64
-            #--cpu=${FFmpeg_CPU}
-            --cross-prefix="${TOOLCHAIN}/bin/aarch64-linux-android-"
-            --sysroot="${SYSROOT}"
-            --target-os=android
-            --extra-ldflags="--ld-path=${TOOLCHAIN}/bin/ld.lld"
-            --extra-ldflags="-nostdlib"
-        )
-        set(FFmpeg_IS_CROSS_COMPILING TRUE)
-    # User attempts to do a FFmpeg cross compilation because...
-    # Here we just quickly test against host/system processors not matching
-    # TODO: Test for versions not matching as well?
-    elseif (NOT (CMAKE_HOST_SYSTEM_PROCESSOR MATCHES CMAKE_SYSTEM_PROCESSOR
-    AND CMAKE_HOST_SYSTEM_NAME MATCHES CMAKE_SYSTEM_NAME))
-        string(TOLOWER "${CMAKE_SYSTEM_NAME}" FFmpeg_SYSTEM_NAME)
-        if (FFmpeg_SYSTEM_NAME STREQUAL "openorbis" OR FFmpeg_SYSTEM_NAME STREQUAL "managarm")
-            set(FFmpeg_SYSTEM_NAME "none")
-        endif()
-        # TODO: Can we really do better? Auto-detection? Something clever?
-        list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
-            --enable-cross-compile
-            --arch="${CMAKE_SYSTEM_PROCESSOR}"
-            --target-os="${FFmpeg_SYSTEM_NAME}"
-            --sysroot="${CMAKE_SYSROOT}"
-        )
-        if (DEFINED FFmpeg_CROSS_PREFIX)
-            list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --cross-prefix="${FFmpeg_CROSS_PREFIX}")
+        if (ANDROID)
+            string(TOLOWER "${CMAKE_HOST_SYSTEM_NAME}" FFmpeg_HOST_SYSTEM_NAME)
+            set(TOOLCHAIN "${ANDROID_NDK}/toolchains/llvm/prebuilt/${FFmpeg_HOST_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_PROCESSOR}")
+            set(SYSROOT "${TOOLCHAIN}/sysroot")
+            set(FFmpeg_CPU "armv8-a")
+            list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
+                --enable-cross-compile
+                --arch=arm64
+                #--cpu=${FFmpeg_CPU}
+                --cross-prefix="${TOOLCHAIN}/bin/aarch64-linux-android-"
+                --sysroot="${SYSROOT}"
+                --target-os=android
+                --extra-ldflags="--ld-path=${TOOLCHAIN}/bin/ld.lld"
+                --extra-ldflags="-nostdlib")
+            set(FFmpeg_IS_CROSS_COMPILING TRUE)
         else()
-            message(WARNING "Please set FFmpeg_CROSS_PREFIX to your cross toolchain prefix, for example: \${CMAKE_STAGING_PREFIX}/bin/${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}-")
+            string(TOLOWER "${CMAKE_SYSTEM_NAME}" FFmpeg_SYSTEM_NAME)
+            # systems FFmpeg natively supports
+            if (NOT (NETBSD OR SOLARIS OR FREEBSD
+            OR OPENBSD OR DRAGONFLYBSD OR HAIKU
+            OR LINUX OR MSYS OR WIN32 OR ANDROID OR APPLE))
+                set(FFmpeg_SYSTEM_NAME "none")
+            endif()
+            # TODO: Can we really do better? Auto-detection? Something clever?
+            list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
+                --enable-cross-compile
+                --arch="${CMAKE_SYSTEM_PROCESSOR}"
+                --target-os="${FFmpeg_SYSTEM_NAME}"
+                --sysroot="${CMAKE_SYSROOT}")
+            if (DEFINED FFmpeg_CROSS_PREFIX)
+                list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --cross-prefix="${FFmpeg_CROSS_PREFIX}")
+            else()
+                message(FATAL_ERROR "Please set FFmpeg_CROSS_PREFIX to your cross toolchain prefix, for example: \${CMAKE_STAGING_PREFIX}/bin/${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}-")
+            endif()
+            set(FFmpeg_IS_CROSS_COMPILING TRUE)
         endif()
-        set(FFmpeg_IS_CROSS_COMPILING TRUE)
     endif()
 endif()
 
-if (OPENORBIS OR MANAGARM)
-    # Doesn't support VA-API, don't go thru the embarrassment of trying to enable it
-    list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
+if (WIN32)
+    list(APPEND FFmpeg_HWACCEL_FLAGS
+        --enable-d3d11va
+        --enable-d3d12va
+        --enable-dxva2
+        --enable-hwaccel=d3d11va_h264
+        --enable-hwaccel=d3d11va2_h264
+        --enable-hwaccel=d3d12va_h264
+        --enable-hwaccel=dxva2_h264
+        --enable-hwaccel=d3d11va_vp9
+        --enable-hwaccel=d3d11va2_vp9
+        --enable-hwaccel=d3d12va_vp9
+        --enable-hwaccel=dxva2_vp9)
 elseif (ANDROID)
     list(APPEND FFmpeg_HWACCEL_FLAGS
         --enable-mediacodec
         --enable-jni
-    )
-elseif (UNIX AND NOT DEFINED FFmpeg_IS_CROSS_COMPILING AND NOT ANDROID)
-    find_package(PkgConfig REQUIRED)
-    pkg_check_modules(LIBVA libva)
-    pkg_check_modules(CUDA cuda)
-    pkg_check_modules(FFNVCODEC ffnvcodec)
-    pkg_check_modules(VDPAU vdpau)
+        --enable-decoder=h264_mediacodec
+        --enable-decoder=vp8_mediacodec
+        --enable-decoder=vp9_mediacodec)
+elseif (APPLE)
+    list(APPEND FFmpeg_HWACCEL_FLAGS
+        --enable-videotoolbox
+        --enable-hwaccel=videotoolbox_h264
+        --enable-hwaccel=videotoolbox_vp9)
+endif()
 
-    find_package(X11)
-    if(X11_FOUND)
-        if (NOT APPLE)
-            # In Solaris needs explicit linking for ffmpeg which links to /lib/amd64/libX11.so
-            if(SOLARIS)
-                list(APPEND FFmpeg_HWACCEL_LIBRARIES
-                    X11
-                    "${CMAKE_SYSROOT}/usr/lib/xorg/amd64/libdrm.so")
-            else()
-                pkg_check_modules(LIBDRM libdrm REQUIRED)
-                list(APPEND FFmpeg_HWACCEL_LIBRARIES
-                    ${LIBDRM_LIBRARIES})
-                list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS
-                    ${LIBDRM_INCLUDE_DIRS})
-            endif()
-            list(APPEND FFmpeg_HWACCEL_FLAGS
-                --enable-libdrm)
-        endif()
-        if(LIBVA_FOUND)
-            pkg_check_modules(LIBVA-DRM libva-drm REQUIRED)
-            pkg_check_modules(LIBVA-X11 libva-x11 REQUIRED)
+find_package(X11)
+if(X11_FOUND)
+    # Include X11 if possible, VDPAU lists it as complementary
+    list(APPEND FFmpeg_HWACCEL_LIBRARIES ${X11_LIBRARIES})
+    list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${X11_INCLUDE_DIRS})
+    list(APPEND FFmpeg_HWACCEL_LDFLAGS ${X11_LDFLAGS})
+else()
+    list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
+endif()
+message(STATUS "ffmpeg: X11 ${X11_FOUND} ${X11_VERSION}")
+
+find_package(PkgConfig)
+if (PkgConfig_FOUND)
+    pkg_check_modules(LIBDRM libdrm)
+    if (LIBDRM_FOUND)
+        # Solaris needs explicit linking for ffmpeg which links to /lib/amd64/libX11.so
+        if(SOLARIS)
             list(APPEND FFmpeg_HWACCEL_LIBRARIES
-                ${X11_LIBRARIES}
-                ${LIBVA-DRM_LIBRARIES}
-                ${LIBVA-X11_LIBRARIES}
-                ${LIBVA_LIBRARIES})
-            list(APPEND FFmpeg_HWACCEL_FLAGS
-                --enable-hwaccel=h264_vaapi
-                --enable-hwaccel=vp8_vaapi
-                --enable-hwaccel=vp9_vaapi)
-            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS
-                ${X11_INCLUDE_DIRS}
-                ${LIBVA-DRM_INCLUDE_DIRS}
-                ${LIBVA-X11_INCLUDE_DIRS}
-                ${LIBVA_INCLUDE_DIRS}
-            )
-            message(STATUS "ffmpeg: va-api libraries version ${LIBVA_VERSION} found")
+                X11
+                "${CMAKE_SYSROOT}/usr/lib/xorg/amd64/libdrm.so")
         else()
-            list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
-            message(WARNING "ffmpeg: libva-dev not found, disabling Video Acceleration API (VA-API)...")
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${LIBDRM_LIBRARIES})
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${LIBDRM_INCLUDE_DIRS})
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${LIBDRM_LDFLAGS})
         endif()
-    else()
-        list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
-        message(WARNING "ffmpeg: X11 libraries not found, disabling VA-API...")
+        list(APPEND FFmpeg_HWACCEL_FLAGS --enable-libdrm)
     endif()
 
+    pkg_check_modules(LIBVA libva)
+    if(LIBVA_FOUND)
+        list(APPEND FFmpeg_HWACCEL_LIBRARIES ${LIBVA_LIBRARIES})
+        list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${LIBVA_INCLUDE_DIRS})
+        list(APPEND FFmpeg_HWACCEL_LDFLAGS ${LIBVA_LDFLAGS})
+        list(APPEND FFmpeg_HWACCEL_FLAGS
+            --enable-vaapi
+            --enable-hwaccel=h264_vaapi
+            --enable-hwaccel=vp8_vaapi
+            --enable-hwaccel=vp9_vaapi)
+        # Logically, they can only exist if libva itself exists
+        pkg_check_modules(LIBVA-DRM libva-drm)
+        if (LIBVA-DRM_FOUND)
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${LIBVA-DRM_LIBRARIES})
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${LIBVA-DRM_INCLUDE_DIRS})
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${LIBVA-DRM_LDFLAGS})
+        endif()
+        message(STATUS "ffmpeg: LIBVA-DRM ${LIBVA-DRM_FOUND} ${LIBVA-DRM_VERSION}")
+        pkg_check_modules(LIBVA-X11 libva-x11)
+        if (LIBVA-X11_FOUND)
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${LIBVA-X11_LIBRARIES})
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${LIBVA-X11_INCLUDE_DIRS})
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${LIBVA-X11_LDFLAGS})
+        endif()
+        message(STATUS "ffmpeg: LIBVA-X11 ${LIBVA-X11_FOUND} ${LIBVA-X11_VERSION}")
+    else()
+        list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
+    endif()
+    message(STATUS "ffmpeg: LIBVA ${LIBVA_FOUND} ${LIBVA_VERSION}")
+
+    pkg_check_modules(VDPAU vdpau)
+    if (VDPAU_FOUND)
+        list(APPEND FFmpeg_HWACCEL_FLAGS
+            --enable-vdpau
+            --enable-hwaccel=h264_vdpau
+            --enable-hwaccel=vp9_vdpau)
+        list(APPEND FFmpeg_HWACCEL_LIBRARIES ${VDPAU_LIBRARIES})
+        list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${VDPAU_INCLUDE_DIRS})
+        list(APPEND FFmpeg_HWACCEL_LDFLAGS ${VDPAU_LDFLAGS})
+    else()
+        list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vdpau)
+    endif()
+    message(STATUS "ffmpeg: VDPAU ${VDPAU_FOUND} ${VDPAU_VERSION}")
+
+    pkg_check_modules(FFNVCODEC ffnvcodec)
     if (FFNVCODEC_FOUND)
         list(APPEND FFmpeg_HWACCEL_FLAGS
             --enable-cuvid
@@ -122,39 +161,42 @@ elseif (UNIX AND NOT DEFINED FFmpeg_IS_CROSS_COMPILING AND NOT ANDROID)
             --enable-nvdec
             --enable-hwaccel=h264_nvdec
             --enable-hwaccel=vp8_nvdec
-            --enable-hwaccel=vp9_nvdec
-        )
+            --enable-hwaccel=vp9_nvdec)
         list(APPEND FFmpeg_HWACCEL_LIBRARIES ${FFNVCODEC_LIBRARIES})
         list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${FFNVCODEC_INCLUDE_DIRS})
         list(APPEND FFmpeg_HWACCEL_LDFLAGS ${FFNVCODEC_LDFLAGS})
-        message(STATUS "ffmpeg: ffnvcodec libraries version ${FFNVCODEC_VERSION} found")
         # ffnvenc could load CUDA libraries at the runtime using dlopen/dlsym or LoadLibrary/GetProcAddress
         # here we handle the hard-linking scenario where CUDA is linked during compilation
-        if (CUDA_FOUND)
-            # This line causes build error if CUDA_INCLUDE_DIRS is anything but a single non-empty value
-            #list(APPEND FFmpeg_HWACCEL_FLAGS --extra-cflags=-I${CUDA_INCLUDE_DIRS})
-            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${CUDA_LIBRARIES})
-            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${CUDA_INCLUDE_DIRS})
-            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${CUDA_LDFLAGS})
-            message(STATUS "ffmpeg: CUDA libraries version ${CUDA_VERSION} found, hard-linking will be performed")
-        endif(CUDA_FOUND)
-    endif()
-
-    if (VDPAU_FOUND AND NOT APPLE)
-        list(APPEND FFmpeg_HWACCEL_FLAGS
-            --enable-vdpau
-            --enable-hwaccel=h264_vdpau
-            --enable-hwaccel=vp9_vdpau
-        )
-        list(APPEND FFmpeg_HWACCEL_LIBRARIES ${VDPAU_LIBRARIES})
-        list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${VDPAU_INCLUDE_DIRS})
-        list(APPEND FFmpeg_HWACCEL_LDFLAGS ${VDPAU_LDFLAGS})
-        message(STATUS "ffmpeg: vdpau libraries version ${VDPAU_VERSION} found")
-    else()
-        list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vdpau)
-        message(WARNING "ffmpeg: libvdpau-dev not found, disabling Video Decode and Presentation API for Unix (VDPAU)...")
+        find_package(CUDAToolkit)
+        if (CUDAToolkit_FOUND)
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${CUDAToolkit_LIBRARIES})
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${CUDAToolkit_INCLUDE_DIRS})
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${CUDAToolkit_LDFLAGS})
+        endif()
+        message(STATUS "ffmpeg: CUDAToolkit ${CUDAToolkit_FOUND} ${CUDAToolkit_VERSION}")
     endif()
+    message(STATUS "ffmpeg: FFNVCODEC ${FFNVCODEC_FOUND} ${FFNVCODEC_VERSION}")
 endif()
+message(STATUS "ffmpeg: PkgConfig ${PkgConfig_FOUND} ${PkgConfig_VERSION}")
+
+find_package(Vulkan)
+if (Vulkan_FOUND)
+    list(APPEND FFmpeg_HWACCEL_FLAGS
+        --enable-vulkan
+        --enable-hwaccel=h264_vulkan
+        --enable-hwaccel=vp9_vulkan)
+    list(APPEND FFmpeg_HWACCEL_LIBRARIES ${Vulkan_LIBRARIES})
+    list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${Vulkan_INCLUDE_DIRS})
+endif()
+message(STATUS "ffmpeg: Vulkan ${Vulkan_FOUND} ${Vulkan_VERSION}")
+
+find_package(spirv-headers)
+if (spirv-headers_FOUND)
+    list(APPEND FFmpeg_HWACCEL_LIBRARIES ${spirv-headers_LIBRARIES})
+    list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${spirv-headers_INCLUDE_DIRS})
+    list(APPEND FFmpeg_HWACCEL_LDFLAGS ${spirv-headers_LDFLAGS})
+endif()
+message(STATUS "ffmpeg: spirv-headers ${spirv-headers_FOUND} ${spirv-headers_VERSION}")
 
 if (OPENORBIS)
     list(APPEND FFmpeg_CROSS_COMPILE_LIBS
@@ -162,20 +204,28 @@ if (OPENORBIS)
         -lSceUserService
         -lSceSysmodule
         -lSceNet
-        -lSceLibcInternal
-    )
+        -lSceLibcInternal)
     list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
         --disable-pthreads
         --extra-cflags=${CMAKE_SYSROOT}/usr/include
         --extra-cxxflags=${CMAKE_SYSROOT}/usr/include
-        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}"
-    )
+        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}")
 elseif (MANAGARM)
     # Required for proper stuff
-    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS 
         --disable-pthreads
-        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}"
-    )
+        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}")
+endif()
+
+# Usually used by Emscripten
+if (DEFINED CMAKE_AR)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --ar=${CMAKE_AR})
+endif()
+if (DEFINED CMAKE_NM)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --nm=${CMAKE_NM})
+endif()
+if (DEFINED CMAKE_RANLIB)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --ranlib=${CMAKE_RANLIB})
 endif()
 
 if (YUZU_USE_BUNDLED_FFMPEG)
@@ -183,44 +233,33 @@ if (YUZU_USE_BUNDLED_FFMPEG)
 
     set(FFmpeg_INCLUDE_DIR
         "${FFmpeg_SOURCE_DIR}/include;${FFmpeg_HWACCEL_INCLUDE_DIRS}"
-        PARENT_SCOPE
-    )
+        PARENT_SCOPE)
 
     set(FFmpeg_PATH
         "${FFmpeg_SOURCE_DIR}"
-        PARENT_SCOPE
-    )
+        PARENT_SCOPE)
 
     set(FFmpeg_LIBRARY_DIR
         "${FFmpeg_SOURCE_DIR}/bin"
-        PARENT_SCOPE
-    )
+        PARENT_SCOPE)
 
     set(FFmpeg_LIBRARIES
         FFmpeg::FFmpeg
         ${FFmpeg_HWACCEL_LIBRARIES}
-        PARENT_SCOPE
-    )
+        PARENT_SCOPE)
+    
+    set(FFmpeg_FOUND YES)
 else()
     # Build FFmpeg from externals
     message(STATUS "Using FFmpeg from externals")
-
-    if (CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|amd64)")
-        # FFmpeg has source that requires one of nasm or yasm to assemble it.
-        # REQUIRED throws an error if not found here during configuration rather than during compilation.
-        find_program(ASSEMBLER NAMES nasm yasm)
-        if ("${ASSEMBLER}" STREQUAL "ASSEMBLER-NOTFOUND")
-            message(FATAL_ERROR "One of either `nasm` or `yasm` not found but is required.")
-        endif()
-    endif()
-
-    find_program(AUTOCONF autoconf)
-    if ("${AUTOCONF}" STREQUAL "AUTOCONF-NOTFOUND")
-        message(FATAL_ERROR "Required program `autoconf` not found.")
-    endif()
-
     AddJsonPackage(ffmpeg)
 
+    # FFmpeg has source that requires one of nasm or yasm to assemble it.
+    if (CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|amd64)")
+        find_program(ASSEMBLER NAMES nasm yasm REQUIRED)
+    endif()
+    find_program(AUTOCONF autoconf REQUIRED)
+
     set(FFmpeg_PREFIX ${ffmpeg_SOURCE_DIR})
     set(FFmpeg_BUILD_DIR ${ffmpeg_BINARY_DIR})
     set(FFmpeg_MAKEFILE ${FFmpeg_BUILD_DIR}/Makefile)
@@ -250,8 +289,15 @@ else()
 
     # `configure` parameters builds only exactly what yuzu needs from FFmpeg
     # `--disable-vdpau` is needed to avoid linking issues
-    set(FFmpeg_CC ${CMAKE_C_COMPILER_LAUNCHER}  ${CMAKE_C_COMPILER})
-    set(FFmpeg_CXX ${CMAKE_CXX_COMPILER_LAUNCHER}  ${CMAKE_CXX_COMPILER})
+    set(FFmpeg_CC ${CMAKE_C_COMPILER_LAUNCHER} ${CMAKE_C_COMPILER})
+    set(FFmpeg_CXX ${CMAKE_CXX_COMPILER_LAUNCHER} ${CMAKE_CXX_COMPILER})
+    set(FFmpeg_HOST_CC ${CMAKE_C_HOST_COMPILER})
+    if (FFmpeg_IS_CROSS_COMPILING)
+        list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --ld=${CMAKE_LINKER})
+    endif ()
+    # TODO: This is a bit fragile, it depends on FFmpeg_HWACCEL_LDFLAGS being a list
+    # whereas CMAKE_C_FLAGS (and likewise) is meant to NOT be a list, but rather
+    # an elongated piece of string
     add_custom_command(
         OUTPUT
             ${FFmpeg_MAKEFILE}
@@ -261,10 +307,12 @@ else()
                 --disable-avformat
                 --disable-doc
                 --disable-everything
+                --disable-autodetect
                 --disable-ffmpeg
                 --disable-ffprobe
                 --disable-network
                 --disable-swresample
+                --disable-iconv
                 --enable-decoder=h264
                 --enable-decoder=vp8
                 --enable-decoder=vp9
@@ -272,45 +320,40 @@ else()
                 --enable-pic
                 --cc=${FFmpeg_CC}
                 --cxx=${FFmpeg_CXX}
-                --ld=${CMAKE_LINKER}
                 --extra-cflags=${CMAKE_C_FLAGS}
                 --extra-cxxflags=${CMAKE_CXX_FLAGS}
-                --extra-ldflags=${CMAKE_C_LINK_FLAGS}
+                --extra-ldflags="${FFmpeg_HWACCEL_LDFLAGS}"
+                --host-cc=${FFmpeg_HOST_CC}
                 ${FFmpeg_HWACCEL_FLAGS}
                 ${FFmpeg_CROSS_COMPILE_FLAGS}
         WORKING_DIRECTORY
-            ${FFmpeg_BUILD_DIR}
-    )
+            ${FFmpeg_BUILD_DIR})
     unset(FFmpeg_CC)
     unset(FFmpeg_CXX)
+    unset(FFmpeg_HOST_CC)
+    unset(FFmpeg_LD)
     unset(FFmpeg_HWACCEL_FLAGS)
     unset(FFmpeg_CROSS_COMPILE_FLAGS)
 
     # Workaround for Ubuntu 18.04's older version of make not being able to call make as a child
     # with context of the jobserver. Also helps ninja users.
-    execute_process(
-        COMMAND
-            nproc
-        OUTPUT_VARIABLE
-            SYSTEM_THREADS)
+    cmake_host_system_information(RESULT SYSTEM_THREADS QUERY NUMBER_OF_LOGICAL_CORES)
+    set(FFmpeg_MAKE_ARGS "")
+    if (DEFINED SYSTEM_THREADS)
+        set(FFmpeg_MAKE_ARGS -j ${SYSTEM_THREADS})
+    endif()
 
     set(FFmpeg_BUILD_LIBRARIES ${FFmpeg_LIBRARIES})
 
-    # BSD make or Solaris make don't support ffmpeg make-j8
-    if (LINUX OR ANDROID OR APPLE OR WIN32 OR FREEBSD)
-        set(FFmpeg_MAKE_ARGS -j${SYSTEM_THREADS})
-    else()
-        set(FFmpeg_MAKE_ARGS "")
-    endif()
-
+    # Most distros use 'gmake', Arch uses 'make'
+    find_program(MAKE NAMES gmake make REQUIRED)
     add_custom_command(
         OUTPUT
             ${FFmpeg_BUILD_LIBRARIES}
         COMMAND
-            gmake ${FFmpeg_MAKE_ARGS}
+            ${MAKE} ${FFmpeg_MAKE_ARGS}
         WORKING_DIRECTORY
-            ${FFmpeg_BUILD_DIR}
-    )
+            ${FFmpeg_BUILD_DIR})
 
     set(FFmpeg_INCLUDE_DIR
         "${FFmpeg_PREFIX};${FFmpeg_BUILD_DIR};${FFmpeg_HWACCEL_INCLUDE_DIRS}"
@@ -332,12 +375,10 @@ else()
     unset(FFmpeg_HWACCEL_INCLUDE_DIRS)
     unset(FFmpeg_HWACCEL_LDFLAGS)
     unset(FFmpeg_HWACCEL_LIBRARIES)
-
-    if (FFmpeg_FOUND)
-        message(STATUS "Found FFmpeg version ${FFmpeg_VERSION}")
-    else()
-        message(FATAL_ERROR "FFmpeg not found")
-    endif()
 endif()
-
 unset(FFmpeg_COMPONENTS)
+
+if (NOT FFmpeg_FOUND)
+    message(FATAL_ERROR "FFmpeg not found")
+endif()
+message(STATUS "Found FFmpeg version ${FFmpeg_VERSION}")