Use mxe to cross compile dependence

Signed-off-by: Yu-Chen Lin <npes87184@gmail.com>

Makefile.CrossWindows

@@ -33,7 +33,9 @@ VERSION := $(shell git describe --tags --always)
 WIN32_TARGET := $(WIN32_TARGET_DIR)-$(VERSION).zip
 WIN64_TARGET := $(WIN64_TARGET_DIR)-$(VERSION).zip
 
-release: clean zip-win32 zip-win64 sums
+CURR_PATH := $(shell pwd)
+
+release: clean zip-win64 sums
 	@echo "Windows archives generated in $(DIST)/"
 
 clean:
@@ -72,28 +74,41 @@ build-win32-noconsole: prepare-deps-win32
 	ninja -C "$(WIN32_NOCONSOLE_BUILD_DIR)"
 
 prepare-deps-win64:
-	-$(MAKE) -C prebuilt-deps prepare-win64
+	[ -d "prebuilt-deps/mxe" ] || git clone git@github.com:mxe/mxe.git prebuilt-deps/mxe
+	$(MAKE) -C prebuilt-deps/mxe MXE_TARGETS=x86_64-w64-mingw32.shared sdl2 -j 4 JOBS=2
+	$(MAKE) -C prebuilt-deps/mxe MXE_TARGETS=x86_64-w64-mingw32.shared ffmpeg -j 4 JOBS=2
+	$(MAKE) -C prebuilt-deps prepare-adb
 
 build-win64: prepare-deps-win64
+	# dirty way, but meson doesn't support relative path in cross file now.
+	# See https://github.com/mesonbuild/meson/issues/3439
+	cp cross_win64.txt cross_win64.txt.tmp
+	sed -i 's#@PWD@#$(CURR_PATH)#g' cross_win64.txt.tmp
 	[ -d "$(WIN64_BUILD_DIR)" ] || ( mkdir "$(WIN64_BUILD_DIR)" && \
 		meson "$(WIN64_BUILD_DIR)" \
-			--cross-file cross_win64.txt \
+			--cross-file cross_win64.txt.tmp \
 			--buildtype release --strip -Db_lto=true \
 			-Dcrossbuild_windows=true \
 			-Dcompile_server=false \
 			-Dportable=true )
 	ninja -C "$(WIN64_BUILD_DIR)"
+	rm cross_win64.txt.tmp
 
 build-win64-noconsole: prepare-deps-win64
+	# dirty way, but meson doesn't support relative path in cross file now.
+	# See https://github.com/mesonbuild/meson/issues/3439
+	cp cross_win64.txt cross_win64.txt.tmp
+	sed -i 's#@PWD@#$(CURR_PATH)#g' cross_win64.txt.tmp
 	[ -d "$(WIN64_NOCONSOLE_BUILD_DIR)" ] || ( mkdir "$(WIN64_NOCONSOLE_BUILD_DIR)" && \
 		meson "$(WIN64_NOCONSOLE_BUILD_DIR)" \
-			--cross-file cross_win64.txt \
+			--cross-file cross_win64.txt.tmp \
 			--buildtype release --strip -Db_lto=true \
 			-Dcrossbuild_windows=true \
 			-Dcompile_server=false \
 			-Dwindows_noconsole=true \
 			-Dportable=true )
 	ninja -C "$(WIN64_NOCONSOLE_BUILD_DIR)"
+	rm cross_win64.txt.tmp
 
 dist-win32: build-server build-win32 build-win32-noconsole
 	mkdir -p "$(DIST)/$(WIN32_TARGET_DIR)"
@@ -115,15 +130,14 @@ dist-win64: build-server build-win64 build-win64-noconsole
 	cp "$(SERVER_BUILD_DIR)"/server/scrcpy-server "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp "$(WIN64_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp "$(WIN64_NOCONSOLE_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN64_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.3.1-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.3.1-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.3.1-win64-shared/bin/avformat-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.3.1-win64-shared/bin/swresample-3.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.3.1-win64-shared/bin/swscale-5.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/adb.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinUsbApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/SDL2-2.0.12/x86_64-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	prebuilt-deps/mxe/tools/copydlldeps.sh --infile "$(DIST)/$(WIN64_TARGET_DIR)/scrcpy.exe" \
+			--destdir "$(DIST)/$(WIN64_TARGET_DIR)/" \
+			--recursivesrcdir prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared \
+			--copy \
+			--objdump prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-objdump
 
 zip-win32: dist-win32
 	cd "$(DIST)/$(WIN32_TARGET_DIR)"; \

app/meson.build

@@ -40,9 +40,9 @@ else
     cc = meson.get_compiler('c')
 
     prebuilt_sdl2 = meson.get_cross_property('prebuilt_sdl2')
-    sdl2_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_sdl2 + '/bin'
-    sdl2_lib_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_sdl2 + '/lib'
-    sdl2_include_dir = '../prebuilt-deps/' + prebuilt_sdl2 + '/include'
+    sdl2_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared/bin'
+    sdl2_lib_dir = meson.current_source_dir() + '/../prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared/bin'
+    sdl2_include_dir = '../prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared/include'
 
     sdl2 = declare_dependency(
         dependencies: [
@@ -54,8 +54,8 @@ else
 
     prebuilt_ffmpeg_shared = meson.get_cross_property('prebuilt_ffmpeg_shared')
     prebuilt_ffmpeg_dev = meson.get_cross_property('prebuilt_ffmpeg_dev')
-    ffmpeg_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_ffmpeg_shared + '/bin'
-    ffmpeg_include_dir = '../prebuilt-deps/' + prebuilt_ffmpeg_dev + '/include'
+    ffmpeg_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared/bin'
+    ffmpeg_include_dir = '../prebuilt-deps/mxe/usr/x86_64-w64-mingw32.shared/include'
     ffmpeg = declare_dependency(
         dependencies: [
             cc.find_library('avcodec-58', dirs: ffmpeg_bin_dir),

cross_win64.txt

@@ -2,11 +2,11 @@
 
 [binaries]
 name = 'mingw'
-c = '/usr/bin/x86_64-w64-mingw32-gcc'
-cpp = '/usr/bin/x86_64-w64-mingw32-g++'
-ar = '/usr/bin/x86_64-w64-mingw32-ar'
-strip = '/usr/bin/x86_64-w64-mingw32-strip'
-pkgconfig = '/usr/bin/x86_64-w64-mingw32-pkg-config'
+c = '@PWD@/prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-gcc'
+cpp = '@PWD@/prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-g++'
+ar = '@PWD@/prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-ar'
+strip = '@PWD@/prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-strip'
+pkgconfig = '@PWD@/prebuilt-deps/mxe/usr/bin/x86_64-w64-mingw32.shared-pkg-config'
 
 [host_machine]
 system = 'windows'