[avrdude-dev] cross compilation of avrdude for Android devices

[luca tamburrano]

Hi all,

I would like to share with you my successful experience (so far) of cross 
compilation of avrdude for Android

First of all I created the following script for setting all the 
cross-compilation variables and I placed it in the source folder of avrdude:

#!/bin/sh


export DEV_PREFIX=/Users/lucatamburrano/Documents/Triduino
export 
LIBUSB1_SOURCE=/Users/lucatamburrano/Documents/Triduino/myavrdude/libusb-1.0.9
export 
LIBUSBCOMPAT_SOURCE=/Users/lucatamburrano/Documents/Triduino/myavrdude/libusb-compat-0.1.4

export ANDROID_NDK=${DEV_PREFIX}/android-ndk-r10b

export CROSS_COMPILE=arm-linux-androideabi

export 
ANDROID_PREFIX=${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64

export SYSROOT=${ANDROID_NDK}/platforms/android-19/arch-arm

export CROSS_PATH=${ANDROID_PREFIX}/bin/${CROSS_COMPILE}

export CPP="${CROSS_PATH}-cpp --sysroot=$SYSROOT"
export AR="${CROSS_PATH}-ar "
export AS="${CROSS_PATH}-as --sysroot=$SYSROOT"
export NM="${CROSS_PATH}-nm --sysroot=$SYSROOT"
export CC="${CROSS_PATH}-gcc --sysroot=$SYSROOT"
export CXX="${CROSS_PATH}-g++ --sysroot=$SYSROOT"
export LD="${CROSS_PATH}-ld --sysroot=$SYSROOT"
export RANLIB="${CROSS_PATH}-ranlib "

export PREFIX=${DEV_PREFIX}/android-builds/

export PKG_CONFIG_PATH=${PREFIX}/lib/pkgconfig

export CFLAGS="${CFLAGS} --sysroot=${SYSROOT} -I${SYSROOT}/usr/include 
-I${ANDROID_PREFIX}/include -I${LIBUSB1_SOURCE}/libusb 
-I${LIBUSBCOMPAT_SOURCE}/libusb"

export CPPFLAGS="${CFLAGS}"

export LDFLAGS="${LDFLAGS} -L${SYSROOT}/usr/lib -L${ANDROID_PREFIX}/lib 
-L${PREFIX}/lib -static "

./configure --host=${CROSS_COMPILE} --prefix=${PREFIX} "$@"

Once compiled as static libs both libusb1 and libusb-compat I encountered a 
tricky problem related to not having recognised the libusb-compat in the 
configure.

I finally found the following post where a guy had a similar problem 

http://sourceforge.net/p/libusb/mailman/libusb-devel/thread/address@hidden/

and the solution was to modify the AC_CHECK_LIB line in configure.ac in order 
to recognise the presence of the libusb-compat 

AC_CHECK_LIB([usb], [usb_get_string_simple], [have_libusb=yes], [], [-lusb-1.0])

then I compiled everything with make and I successfully upload a sketch to 
Arduino from my android mobile :)

I haven’t recompiled it yet with the libftdi support because I encountered some 
problems with CMAKE, but I hope that sharing my experience will save many 
headaches to people that are trying to do the same

hope that helps

Luca