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DOCS: add some basic MinGW cross compilation instructions

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wm4 2013-01-08 17:11:59 +01:00
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Cross compiling mpv to Windows is supported with MinGW-w64. This can be used to
produce both 32 bit and 64 bit executables. MinGW-w64 is available from
http://mingw-w64.sourceforge.net.
You have to run mpv's configure with these arguments:
./configure --enable-cross-compile --target=i686-w64-mingw32
Using MXE to setup a MinGW-w64 environment is recommended: http://mxe.cc
Currently, using an experimental branch of MXE is required:
https://github.com/tonytheodore/mxe.git
Warning: the original MinGW (http://www.mingw.org) is unsupported.
Note that MingGW environments included in Linux distributions are often broken,
outdated and useless, and usually don't use MinGW-w64.
Example with MXE
================
# Download MXE. Note that compiling the required packages requires about 1 GB
# or more! We are using an experimental repository, which supports MinGW-w64.
# The official MXE supports classic MinGW only, which doesn't work with mpv.
cd /opt
git clone https://github.com/tonytheodore/mxe.git mingw
cd mingw
# Edit the MXE target, so that MingGW-w64 for 32 bit targets is built.
echo "MXE_TARGETS := i686-w64-mingw32" > settings.mk
# Build required packages. The following provide a minimum required to build
# mpv. (Not all of the following packages are strictly required.)
make gcc
make ffmpeg
make libass
make jpeg
make pthreads
# MXE and MingGW-w64 don't provide up-to-date OpenGL headers (to my knowledge).
wget http://www.opengl.org/registry/api/glext.h
mv glext.h usr/i686-w64-mingw32/include/GL/
# Build mpv. The target will be used to automatically select the name of the
# build tools involved (e.g. it will use i686-w64-mingw32-gcc).
git clone https://github.com/mpv-player/mpv.git
cd mpv
export PATH=/opt/mingw/usr/bin/:$PATH
./configure --enable-cross-compile --target=i686-w64-mingw32
make
# This should work. For some reason, the resulting .exe will depend on the DLL
# /opt/mingw/usr/i686-w64-mingw32/bin/libwinpthread-1.dll because pthreads-w32
# folks don't like static linking. How to enable static linking is left as
# exercise for the reader. Passsing --disable-pthreads to mpv's configure will
# get rid of the dependency, but may disable some features.