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HowTo-Cross-Compile.md

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+# Cross Compile
+
+This manual explains the steps to prepare a basic cross compiling environment on Debian. The build will be installed to `/opt/W64-cross-compile`. If the destination folder is set up right, you do not need any root rights.
+
+The following packages are needed:
+- wine
+- wine64
+- mingw-w64
+- mingw-w64-tools
+
+# Prepare the `cross-file.ini`
+
+This configuration file will be needed on all meson builds.
+
+	[host_machine]
+	system = 'windows'
+	cpu_family = 'x86_64'
+	cpu = 'x86_64'
+	endian = 'little'
+
+	[properties]
+	c_args = []
+	c_link_args = []
+
+	[binaries]
+	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'
+	windres = '/usr/bin/x86_64-w64-mingw32-windres'
+	ld = '/usr/bin/x86_64-w64-mingw32-ld'
+	exe_wrapper = 'wine64'
+
+
+# lib-glib
+
+Compile the library using the following steps.
+
+	mkdir build
+	cd build
+	meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	mseon compile
+	meson install
+
+Because not all compiled `*.dll` files are installed into the destination we need to copy them manualy.
+
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+# atk
+
+Compile the library using the following steps.
+
+	mkdir build
+	cd build
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	mseon compile
+	meson install
+
+Copy manualy all compiled `*.dll` files to the destination
+
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+# pango
+
+Compile the library using the following steps.
+
+	mkdir build
+	cd build
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	mseon compile
+	meson install
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+# gdk-pixbuf
+
+	mkdir build
+	cd build
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	mseon compile
+	meson install
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+# libepoxy
+
+
+Compile the library using the following steps.
+
+	mkdir build
+	cd build
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	mseon compile
+	meson install
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+
+# GTK
+
+## preparation beacuse of `wine`
+
+Copy all compiled executeble and library files into the wine windows/system folder.
+
+	cp /opt/W64-cross-compile/bin/*.exe ~/.wine/drive_c/windows/system32/
+	cp /opt/W64-cross-compile/lib/*.dll ~/.wine/drive_c/windows/system32/
+
+## workaround 1 for some issues
+
+edit the file `gdk/win32/gdkprivate-win32.h` and search around line 300 for the following declaration. The compiler is missing the **extern** statement here.
+	300 /* The singleton selection object pointer */
+	301 extern GdkWin32Selection *_win32_selection;
+
+## compile first attempt
+
+Configure and compile the library.
+
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig ./configure --prefix=/opt/W64-cross-compile/ --host=x86_64-w64-mingw32
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig make
+	make install
+
+## fix and install the compilation
+
+	/bin/bash: Zeile 1: ../../gtk/gtk-update-icon-cache.exe: Kann die Binärdatei nicht ausführen: Fehler im Format der Programmdatei
+	make[3]: *** [Makefile:1673: install-update-icon-cache] Fehler 126
+
+Edit the Makefile in demos/gtk-demos and add in line the wine prefix. Try to run the `make install`command and do the same for the next errors.
+
+	/bin/bash: Zeile 1: ../../gtk/gtk-update-icon-cache.exe: Kann die Binärdatei nicht ausführen: Fehler im Format der Programmdatei
+	make[5]: *** [Makefile:1184: install-update-icon-cache] Fehler 126
+	make[5]: Verzeichnis „/home/steffen/gtkcrosscompile/gtk+-3.24.0/demos/widget-factory“ wird verlassen
+
+If the compilation did well copy all *.dll files into the destination.	
+
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+