Cross-compiling libavg 1.7 for ARM on Debian

libavg is a high-level development platform for media-centric applications using Python as scripting language and written in C++ and I’ve already written a post to cross-compile libavg 1.6 in Ubuntu (with linaro cross toolchain) and using Beagleboard qemu image.

Since I’ve doing some preparation work to have software running on the Raspberry Pi and that the latter won’t support Ubuntu, I’ve had to cross-compile it again. This time, I’ve found a cleaner way to do the cross-compilation with dpkg-cross and xapt tools which can load the required armel package to the arm toolchain. Those tools really make life easy, as previously (a few years ago), I would have had to cross-compile all dependencies manually.

Here are the steps I followed:

Install Emdebian ARM Cross Toolchain and Tools in Debian.
Download libavg 1.7 source code

wget http://www.libavg.de/raw-attachment/wiki/DownLoad/libavg-1.7.0.tar.gz

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wget http://www.libavg.de/raw-attachment/wiki/DownLoad/libavg-1.7.0.tar.gz
Extract it

tar xzvf libavg-1.7.0.tar.gz cd libavg-1.7.0

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tar xzvf libavg-1.7.0.tar.gz
cd libavg-1.7.0
Install the following armel development packages:

sudo /usr/share/pdebuild-cross/xapt -a armel libpango1.0-dev libavformat-dev libavcodec-dev libswscale-dev python2.6-dev libboost-python-dev libboost-thread-dev libglu-dev libgl1-mesa-dev libgtk2.0-dev libglib2.0-dev libsdl-dev libxml2-dev libxxf86vm-dev libcairo-dev librsvg2-dev --force-yes
Remove the SSE2 flags in configure script:

cat configure | sed s/-msse2// > configure.arm mv configure.arm configure chmod 755 configure

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cat configure | sed s/-msse2// > configure.arm
mv configure.arm configure
chmod 755 configure
There is some x86 assembler in the code, we need to disable it.
Edit src/base/Exception.cpp and replace debugBreak code by :

void debugBreak() { #ifndef __arm__ #ifdef _WIN32     __asm int 3; #else     asm("int $3"); #endif #else     asm("swi 0x03"); #endif }

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void debugBreak()
{
#ifndef __arm__
#ifdef _WIN32
    __asm int 3;
#else
    asm("int $3");
#endif
#else
    asm("swi 0x03");
#endif
}

Please note that I’m not fully sure of the ARM assembly I’ve used to replace the INT x86 instruction. If I’m wrong let me know. Anyway this code should not be called if the environment variable AVG_BREAK_ON_ASSERT is not set to 1.

Export some environment variables (or create source.env file instead):

export PANGOFT2_CFLAGS="-I/usr/arm-linux-gnueabi/include/"
export PANGOFT2_LIBS="-L/usr/arm-linux-gnueabi/lib/"
export GDK_PIXBUF_CFLAGS="-I/usr/arm-linux-gnueabi/include/"
export GDK_PIXBUF_LIBS="-L/usr/arm-linux-gnueabi/lib/"
export LIBRSVG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"
export LIBRSVG_LIBS="-L/usr/arm-linux-gnueabi/lib/"
export FONTCONFIG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"
export FONTCONFIG_LIBS="-L/usr/arm-linux-gnueabi/lib/"
export FFMPEG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"
export FFMPEG_LIBS="-L/usr/arm-linux-gnueabi/lib/"

export PANGOFT2_CFLAGS="-I/usr/arm-linux-gnueabi/include/"

export PANGOFT2_LIBS="-L/usr/arm-linux-gnueabi/lib/"

export GDK_PIXBUF_CFLAGS="-I/usr/arm-linux-gnueabi/include/"

export GDK_PIXBUF_LIBS="-L/usr/arm-linux-gnueabi/lib/"

export LIBRSVG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"

export LIBRSVG_LIBS="-L/usr/arm-linux-gnueabi/lib/"

export FONTCONFIG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"

export FONTCONFIG_LIBS="-L/usr/arm-linux-gnueabi/lib/"

export FFMPEG_CFLAGS="-I/usr/arm-linux-gnueabi/include/"

export FFMPEG_LIBS="-L/usr/arm-linux-gnueabi/lib/"

Configure, build and install libavg:

CFLAGS="-I/usr/arm-linux-gnueabi/include/gtk-2.0 -I/usr/arm-linux-gnueabi/include/glib-2.0" CXXFLAGS="-I/usr/arm-linux-gnueabi/include/gtk-2.0 -I/usr/arm-linux-gnueabi/include/glib-2.0/ -I/usr/arm-linux-gnueabi/lib/glib-2.0/include/ -I/usr/arm-linux-gnueabi/include/pango-1.0 -I/usr/arm-linux-gnueabi/include/cairo/ -I/usr/arm-linux-gnueabi/include/librsvg-2" LDFLAGS="-lgdk_pixbuf-2.0 -lavcodec -lavutil -lavformat -lswscale -lSDL -lpango-1.0 -lpangoft2-1.0 -lrsvg-2" ./configure --target=arm-linux-gnueabi --host=arm-linux-gnueabi --with-sdl-prefix=/usr/arm-linux-gnueabi --prefix=/home/jaufranc/edev/raspberry-pi/libs make make install

This was tested in Deiban Squeeze (6.0.3) in VirtualBox.

Jean-Luc Aufranc (CNXSoft)

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.