# Cross-compile OpenOCD on GNU/Linux for Windows

## Overview

The following was done using OpenOCD 0.8.0 and Archlinux x86_64. The toolchain I used is mingw-w64. The target OS is Windows 7 32bits, but it should also work for 64bits versions. 



## Requirements

You need a few packages. Some already exist in community or in AUR so:

    yaourt -S mingw-w64-gcc mingw-w64-libusb mingw-w64-hidapi

### LibFTDI

Download this pkgbuild, make your package and install it: {{:gnulinux:pkgbuild:mingw-w64-libftdi.tar.gz|}}

    makepkg
    yaourt -U ./mingw-w64-libftdi*.tar.xz

### LibUSB-compat

Download this pkgbuild, make your package and install it: {{:gnulinux:pkgbuild:mingw-w64-libusb-compat.tar.gz}}

    makepkg
    yaourt -U ./mingw-w64-libusb-compat*.tar.xz

#### Fix

Here's the trick, you need to remove the existing usb.h from mingw-w64-headers to be able to install mingw-w64-libusb-compat. There must be a better way to fix this conflict but I didn't have much time to investigate...

## OpenOCD compilation

Get openocd-0.8.0.tar.bz2 from Sourceforge
    tar xavf openocd-0.8.0.tar.bz2
    cd openocd-0.8.0
    # Eventually apply the patches you want
    autoreconf -fiv
    mkdir build
    cd build
    HIDAPI_LIBS="-lhidapi" ../configure --build=i686-pc-linux-gnu --host=i686-w64-mingw32 --disable-shared
    make -j8

Get __openocd.exe__ from _build/src/_

It will require the DLL files from  _/usr/i686-w64-mingw32/bin/_

## Running OpenOCD

Put the executable and the DLL in the same folder. Install WinUSB drivers for you device (maybe using Zadig). And you should be able to run OpenOCD with you usual config files.