[HowTo] Cross Compile coins with mxe | Setup mxe

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Hey folks,

It is time to introduce my "HowTo" category. Today we will install and setup mxe for cross compiling coins.

Step 1: Installing mxe

As always you first of all need to install the dependencies. In the case of mxe there are many dependencies:

sudo apt-get install p7zip-full autoconf automake autopoint bash bison bzip2 cmake flex gettext git g++ gperf intltool libffi-dev libtool libltdl-dev libssl-dev libxml-parser-perl make openssl patch perl pkg-config python ruby scons sed unzip wget xz-utils

And for 64bit Ubuntu you also need:

sudo apt-get install g++-multilib libc6-dev-i386

After your done with deps, head to the directory you want to install mxe in, in my case i use /mnt so lets change the user rights for this directory:

sudo chmod ugo+rw /mnt

Done? Ok let's continue

cd /mnt

git clone https://github.com/mxe/mxe.git

Step 2: Install packages

After the last two lines your mxe installation should be placed in /mnt/mxe. Now we have to install some packages you definitly will need to compile coins. So switch to your mxe dir and lets compile:

cd /mnt/mxe

make MXE_TARGETS="i686-w64-mingw32.static" boost

make MXE_TARGETS="i686-w64-mingw32.static" qttools

make MXE_TARGETS="i686-w64-mingw32.static" qt

make MXE_TARGETS="i686-w64-mingw32.static" qt5

Nearly all coins use berkleydb and miniupnpc. Unfortunatly they are no packages included in mxe so we have to compile it ourselves:

cd /mnt

wget http://download.oracle.com/berkeley-db/db-5.3.28.tar.gz

wget http://miniupnp.free.fr/files/miniupnpc-1.6.20120509.tar.gz

When the download has finished untar each and switch into the first directory and create an new file and name it something like compile-mxe-db.sh or something else. Open it and paste ste following:

#!/bin/bash

MXE_PATH=/mnt/mxe

sed -i "s/WinIoCtl.h/winioctl.h/g" src/dbinc/win_db.h

mkdir build_mxe

cd build_mxe

CC=$MXE_PATH/usr/bin/i686-w64-mingw32.static-gcc \

CXX=$MXE_PATH/usr/bin/i686-w64-mingw32.static-g++ \

../dist/configure \

 --disable-replication \

 --enable-mingw \

 --enable-cxx \

 --host x86 \

 --prefix=$MXE_PATH/usr/i686-w64-mingw32.static

make

make install

Make it executable with a right-click->permissions->Run as executable or :

chmod ugo+x compile-mxe-db.sh

and start it with:

./compile-mxe-db.sh

Repeat the last steps for miniupnpc too:

cd /mnt

tar zxvf miniupnpc-1.6.20120509.tar.gz



cd /mnt/miniupnpc-1.6.20120509

touch compile-mxe-miniupnpc.sh

chmod ugo+x compile-mxe-miniupnpc.sh



#!/bin/bash

MXE_PATH=/mnt/mxe

CC=$MXE_PATH/usr/bin/i686-w64-mingw32.static-gcc \

AR=$MXE_PATH/usr/bin/i686-w64-mingw32.static-ar \

CFLAGS="-DSTATICLIB -I$MXE_PATH/usr/i686-w64-mingw32.static/include" \

LDFLAGS="-L$MXE_PATH/usr/i686-w64-mingw32.static/lib" \

make libminiupnpc.a

mkdir $MXE_PATH/usr/i686-w64-mingw32.static/include/miniupnpc

cp *.h $MXE_PATH/usr/i686-w64-mingw32.static/include/miniupnpc

cp libminiupnpc.a $MXE_PATH/usr/i686-w64-mingw32.static/lib



./compile-mxe-miniupnpc.sh