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As with all Wiki pages, also this page is a work in progress. try to be a big help to the Paparazzi project and improve this page whenever you can. If you have a distribution different from Ubuntu which doesn't satisfy any other dependency and have instructions about compiling it, packaging it, feel free to add any reference on how to do that on this wikipage.


The goal of this page is to clarify about which version of each piece of software has to be compiled, where to find that software, patches needed to make it compile on Linux. In our case 64bit Linux. This includes compiling all paparazzi-dev, paparazzi-arm7, paparazzi-stm32 and paparazzi-bin software on your machine, running an Ubuntu Lucid Lynx or later Linux distribution or maybe even FreeBSD, or OSX.

The shortcut

Maybe you are no so interested in the details at this moment and just want to quickly install. That's fine, for that we are working on a script and you only need to run one line to get everything installed. For this to work out you do need a working internet connection, but since you can read this text, that will probably not pose a problem.

$ cd ~ && wget (still not ready and a work in progress)

If you used the line above, and it all worked out you can stop reading now since everything is installed and compiled, ready for you to use.

Paparazzi-dev packages

For Ubuntu users, you can install the following packages from standard repository. You can just copy the line(s) and paste into your terminal. But do not copy the $ sign, this symbol is just added on this page to show that it is to be pasted at a normal terminal prompt.

Whole lot in one

 sudo apt-get install ocaml libcamlimages-ocaml liblablgtk2-ocaml-dev liblablgtk2-gl-ocaml-dev \
                      liblablgtk2-gnome-ocaml-dev libxml-light-ocaml-dev libocamlnet-ocaml-dev libpcre-ocaml \
                      libpcre-ocaml-dev libgnomecanvas2-0 libgnomecanvas2-dev libglade2-0 libglade2-dev make build-essential \
                      git-core gnuplot boa m4 libtool libftdi-dev libmpfr-dev tcl8.5-dev xutils-dev

Ocaml and libraries

Ocaml, short for Objective Caml is the most popular variant of the Caml language. The Paparazzi Ground Control Station (GCS) and some of it's tools are crafted in this language.

  • ocaml, ocaml-camlimages-devel, ocaml-lablgtk2-devel, ocaml-xml-light-devel, ocamlnet-ocaml-devel
$ sudo apt-get install ocaml libcamlimages-ocaml liblablgtk2-ocaml-dev liblablgtk2-gl-ocaml-dev \
                       liblablgtk2-gnome-ocaml-dev libxml-light-ocaml-dev libocamlnet-ocaml-dev

Gnome canvas Library

The GnomeCanvas is an engine for structured graphics that offers a rich imaging model, high performance rendering, and a powerful, high level API. This widget can be used for flexible display of graphics and for creating interactive user interface elements.

$ sudo apt-get install libgnomecanvas2-0 libgnomecanvas2-dev

USB Library

The libusb project aims to create a library for use by user level applications to access USB devices regardless of OS.

$ sudo apt-get install libusb-dev

Ocaml PCRE

This OCaml-library interfaces the PCRE (Perl-compatibility regular expressions) C library. it can be used for matching regular expressions which are written in Perl style.

$ sudo apt-get install libpcre-ocaml libpcre-ocaml-dev

Glade Library

Libglade is a library that performs a similar job to the C source output routines in the GLADE user interface builder. Whereas GLADE's output routines create C source code that must be compiled, libglade builds the interface from an XML file (GLADE's save format) at runtime. This can allow modifying the user interface without recompiling.

$ sudo apt-get install libglade2-0 libglade2-dev


$ sudo apt-get install tcl8.5-dev

Also the some utils are required to compile and install Ivy.

$ sudo apt-get install xutils-dev


GNU Make is an utility which controls the generation of executables and other target files of a program from the program's source files.

$ sudo apt-get install make

Build essential

$ sudo apt-get install build-essential


GNU libtool is a generic library support script. Libtool hides the complexity of using shared libraries behind a consistent, portable interface. Creating the files for Paparazzi software building becomes less cumbersome by using this tool.

$ sudo apt-get install libtool

Git Client

Git is a version control system. Version control systems allow many individuals to collaborate on the Paparazzi source code. This is needed to retrieve the latest sourcecode from various packages and Paparazzi sourcecode itself.

$ sudo apt-get install git-core

GNU Plot

A command-line driven interactive plotting program. Unknow if it is used

$ sudo apt-get install gnuplot

FTDI library

libftdi is a library that talks to FTDI's 232 type chips, including the popular bitbang mode, using libusb. A library to be able to use with a debugging Autopilot hardware boards.

$ sudo apt-get install libftdi-dev 

MPFR library

The MPFR library is a C library for multiple-precision floating-point computations with correct rounding. MPFR is based on the GMP multiple-precision library. The main goal of MPFR is to provide a library for multiple-precision floating-point computation which is both efficient and has a well-defined semantics.

$ sudo apt-get install libmpfr-dev


ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. Being able to modify image based map pictures is a feature that may come in handy one time.

$ sudo apt-get install imagemagick

Optional on an older OS

If you have an older OS distribution it never hurts to install the following...

$ sudo apt-get install libx11-6 libx11-dev texinfo flex bison libncurses5 libncurses5-dev libncursesw5 libncursesw5-dev zlibc

Building the Cross compiler toolchain

The goal of this part is to building an ARM and STM32 cross-toolchain with binutils gcc newlib and gdb from source. This is needed so we can compile the code that ends up onto the autopilot board. Newlib is a C library intended for use on embedded systems. It is a conglomeration of several library parts, all under free software licenses that make them easily usable on embedded products. Enter the following on your command prompt

$ cd ~
$ nano

Then copy the part below (CTRL+C) and go to your terminal window again and use CTRL+SHIFT+V to paste the text into the nano editor. Afterther save the file with CTRL+X and answer Y


# ******************************************************************************
# Goal: Get the ARM and STM32 cross compilers, tools and libraries installed and all 
#       working on 64Bit (Linux) computer system like they should
# Version:  1.7 
# Copyright: 2011 LGPL OpenUAS
# Date: 20110225 14:01
# Usage: $ sh ./ 2>&1 | tee buildlog.txt  
# I want to improve this script, what can I do?
#  IMPR: Add STM32 support
#  IMPR: with automatic log filename appending date like "date +%y%j%H%M%S"
#  IMPR: Set MAJOR and MINOR GCC version in make parameter automatically
#  IMPR: Add all commands from this wikipage also to the script, so we have a 
#        full paparazzi from scratch in one script!
# Useful links:
# Older compiler
# Replaced O_CREAT for S_IRWXU in the files where you get gcc-3.4.4/gcc/collect2.c
# The eBook "Definitive guide to GCC" may come in handy
# And if all went well, a command
#  $ arm-elf-gcc -print-multi-lib
# Should give the following 
# .;
# thumb;@mthumb
# interwork;@mthumb-interwork
# thumb/interwork;@mthumb@mthumb-interwork
# ******************************************************************************

# In case you want to recompile, and if you do not want to re-download the files
# to save time and bandwith set CLEANUPDOWNLOADS to N

TARGET=arm-elf  #Or use  TARGET=arm-none-eabi or arm_non_eabi the pararazzi makefile will figure it out
PREFIX=$HOME/arm-elf-paparazzi # Install location of the final toolchain, change this to your liking

# If you have a good reason to compile other versions, ONLY then change the version data below

#Just in case for some reason you want the latest versions a just values here
# and some more 3.4 in the rest of the script
#PREFIX=$HOME/arm-elf-latest # Install location of the final toolchain, change this to your liking

# ******************************************************************************
# * No need to change anything below this line, exept improvements             *
# ******************************************************************************

# On multicore Processor this value can speedup the compilation
if grep -q "processor" /proc/cpuinfo || grep -q "siblings" /proc/cpuinfo
  SPEEDUPCOMPILATION="-j "$(($( grep "processor" /proc/cpuinfo | sort -u | wc -l ) * $( grep "siblings" /proc/cpuinfo | tail -1 | cut -d: -f2 )))

# Install texinfo tool
sudo apt-get install texinfo

# A GCC v3.4 64Bit install to avoid issues whil compiling the crosscompiler, native compile use would be much better
# Or, get debian packages from here or
wget -N -c
wget -N -c
wget -N -c 
# Must be installed in this order
sudo dpkg -i gcc-3.4-base_3.4.6-8ubuntu2_amd64.deb
sudo dpkg -i cpp-3.4_3.4.6-8ubuntu2_amd64.deb
sudo dpkg -i gcc-3.4_3.4.6-8ubuntu2_amd64.deb
if [ "${CLEANUPDOWNLOADS}" != "N" ]
  rm *.deb


mkdir $PREFIX

# ** Now set the gcc and tools to be used in environment
echo 'export PATH='$PREFIX'/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

rm -drf build
mkdir build

# Get and compile the BinUtils
wget -N -c$BINUTILS.tar.bz2
tar xfvj $BINUTILS.tar.bz2 
cd build
unset CFLAGS && unset LDFLAGS && unset CPPFLAGS && unset CXXFLAGS &&
../$BINUTILS/configure -v --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib --enable-shared --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=$TARGET
make $SPEEDUPCOMPILATION CC=gcc-3.4 CXX=g++-3.4 
make CC=gcc-3.4 CXX=g++-3.4 install
cd ..
rm -rf build/* $BINUTILS
if [ "${CLEANUPDOWNLOADS}" != "N" ]
  rm $BINUTILS.tar.bz2

# ** Get and compile GCC stuff
wget -N -c$GCC/$GCC.tar.bz2
tar xfvj $GCC.tar.bz2

# Set correct MULTILIB options in GCC config, by patching
rm -f $ONTHFLYPATCHFILE #Just to make sure
echo '--- t-arm-elf	2003-09-30 12:21:41.000000000 +0200' >> $ONTHFLYPATCHFILE
echo '+++ t-arm-elf	2010-08-07 19:17:47.000000000 +0200' >> $ONTHFLYPATCHFILE
echo '@@ -26,8 +26,8 @@' >> $ONTHFLYPATCHFILE
echo ' # MULTILIB_DIRNAMES   += 32bit 26bit' >> $ONTHFLYPATCHFILE
echo ' # MULTILIB_EXCEPTIONS += *mthumb/*mapcs-26*' >> $ONTHFLYPATCHFILE
echo '-# MULTILIB_OPTIONS    += mno-thumb-interwork/mthumb-interwork' >> $ONTHFLYPATCHFILE
echo '-# MULTILIB_DIRNAMES   += normal interwork' >> $ONTHFLYPATCHFILE
echo '+MULTILIB_OPTIONS    += mno-thumb-interwork/mthumb-interwork' >> $ONTHFLYPATCHFILE
echo '+MULTILIB_DIRNAMES   += normal interwork' >> $ONTHFLYPATCHFILE
echo ' # MULTILIB_EXCEPTIONS += *mapcs-26/*mthumb-interwork*' >> $ONTHFLYPATCHFILE
echo ' # MULTILIB_OPTIONS    += fno-leading-underscore/fleading-underscore' >> $ONTHFLYPATCHFILE
patch $GCC/gcc/config/arm/t-arm-elf < $ONTHFLYPATCHFILE
cd build

# IMPR "../$GCC/gcc/collect2.c" ajust the line in this file to prevent compiler error for older gcc to "redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT, S_IRWXU);"
unset CFLAGS && unset LDFLAGS && unset CPPFLAGS && unset CXXFLAGS &&
../$GCC/configure -v --enable-languages=c --prefix=$PREFIX --infodir=$PREFIX"/share/info" --mandir=$PREFIX"/share/man" --enable-interwork --enable-multilib --enable-shared --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=$TARGET
make $SPEEDUPCOMPILATION CC=gcc-3.4 CXX=g++-3.4  all
make CC=gcc-3.4 CXX=g++-3.4 install
cd ..
# NOTE: We do not delete GCC temporary build yet, we need it once more later in this script

if [ "${CLEANUPDOWNLOADS}" != "N" ]
  rm $GCC.tar.bz2

# Now get and compile NewLib, note that sometimes this server is to busy serving the files,
# try to get the files via an FTP client with good resume if it happens
wget -N -c --waitretry=20$NEWLIB.tar.gz
tar xfvz $NEWLIB.tar.gz
cd build
unset CFLAGS && unset LDFLAGS && unset CPPFLAGS && unset CXXFLAGS &&
../$NEWLIB/configure -v --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib --enable-shared --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --build=x86_64-linux-gnu --host=x86_64-linux-gnu
make $SPEEDUPCOMPILATION CC=gcc-3.4 CXX=g++-3.4 
make CC=gcc-3.4 CXX=g++-3.4  install
cd ..
rm -rf build/* $NEWLIB 
if [ "${CLEANUPDOWNLOADS}" != "N" ]
  rm -rf $NEWLIB.tar.gz

# GCC needs to be build again including the real newlib now
cd build
unset CFLAGS && unset LDFLAGS && unset CPPFLAGS && unset CXXFLAGS &&
../$GCC/configure -v --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib --enable-languages="c,c++" --with-newlib --enable-shared --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --build=x86_64-linux-gnu --host=x86_64-linux-gnu --infodir=$PREFIX"/share/info" --mandir=$PREFIX"/share/man"

make $SPEEDUPCOMPILATION CC=gcc-3.4 CXX=g++-3.4 all-gcc
make CC=gcc-3.4 CXX=g++-3.4 install-gcc
cd ..
rm -rf build/* $GCC
rm -rf build

# We need a symlink to arm-elf-gcc in /usr/bin/ the way the current paparazzi AP compile script works
# We need a better solution here then symlinks, any clues...plz improve
# Yes, helping with a better use of shell by using arm-elf wild-cards is appreciated 
#Remove old symlinks
for x in $OURBINDIR/arm-elf*; do if [ -L $x ]; then sudo rm $x; fi ; done
#Make fresh symlinks so arm tools ar found by paparazzi center
sudo ln -s $PREFIXBINDIR/arm-elf-gcc $OURBINDIR/arm-elf-gcc
sudo ln -s $PREFIXBINDIR/arm-elf-size $OURBINDIR/arm-elf-size
sudo ln -s $PREFIXBINDIR/arm-elf-objcopy $OURBINDIR/arm-elf-objcopy
sudo ln -s $PREFIXBINDIR/arm-elf-objdump $OURBINDIR/arm-elf-objdump
sudo ln -s $PREFIXBINDIR/arm-elf-nm $OURBINDIR/arm-elf-nm
sudo ln -s $PREFIXBINDIR/arm-elf-addr2line $OURBINDIR/arm-elf-addr2line
sudo ln -s $PREFIXBINDIR/arm-elf-ar $OURBINDIR/arm-elf-ar
sudo ln -s $PREFIXBINDIR/arm-elf-as $OURBINDIR/arm-elf-as
sudo ln -s $PREFIXBINDIR/arm-elf-c++filt $OURBINDIR/arm-elf-c++filt
sudo ln -s $PREFIXBINDIR/arm-elf-cpp $OURBINDIR/arm-elf-cpp
sudo ln -s $PREFIXBINDIR/arm-elf-gcc $OURBINDIR/arm-elf-gcc
sudo ln -s $PREFIXBINDIR/arm-elf-gcc-3.4.4 $OURBINDIR/arm-elf-gcc-3.4.4
sudo ln -s $PREFIXBINDIR/arm-elf-gccbug $OURBINDIR/arm-elf-gccbug
sudo ln -s $PREFIXBINDIR/arm-elf-gcov $OURBINDIR/arm-elf-gcov
sudo ln -s $PREFIXBINDIR/arm-elf-ld $OURBINDIR/arm-elf-ld
sudo ln -s $PREFIXBINDIR/arm-elf-nm $OURBINDIR/arm-elf-nm
sudo ln -s $PREFIXBINDIR/arm-elf-objcopy $OURBINDIR/arm-elf-objcopy
sudo ln -s $PREFIXBINDIR/arm-elf-objdump $OURBINDIR/arm-elf-objdump
sudo ln -s $PREFIXBINDIR/arm-elf-ranlib $OURBINDIR/arm-elf-ranlib
sudo ln -s $PREFIXBINDIR/arm-elf-readelf $OURBINDIR/arm-elf-readelf
sudo ln -s $PREFIXBINDIR/arm-elf-size $OURBINDIR/arm-elf-size
sudo ln -s $PREFIXBINDIR/arm-elf-strings $OURBINDIR/arm-elf-strings
sudo ln -s $PREFIXBINDIR/arm-elf-strip $OURBINDIR/arm-elf-strip

# If you also a want to add the debugger, Uncomen the lines here. Configure could need parameter "--disable-werror" in some cases
#wget -N -c$GDB.tar.bz2
#tar xfvj $GDB.tar.bz2
#cd build
#../$GDB/configure --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib
#make install
#cd ..

#rm -rf build $GDB
#if [ "${CLEANUPDOWNLOADS}" != "N" ]
#  rm $GDB.tar.bz2

echo "Misterious as this scripts progress might have looked, everything is now done, hopefully without any issue"

Then run the script in a terminal window via:

$ sh ./ 2>&1 | tee buildlog.txt

Rest of code needed

To install the rest we make a special directory "develop". You can give it another name ofcourse.

$ mkdir ~/develop


To get the software onto the main autopilot board a special tool is needed. We will use the great open-source LPC21ISP application. LPC21ISP is an in-circuit programming (ISP) tool for the microcontroller used on the Paparazzi autopilot boards. The lpc21isp project is hosted on sourceforge and one can find the source packages and information at

Get the SVN version via

$ mkdir -p ~/develop/lpc21isp
$ cd ~/develop/lpc21isp
$ svn co lpc21

To compile go into the source directory and then do

$ cd lpc21
$ make -f Makefile clean all

To install

$ sudo cp lpc21isp /usr/bin/


IVY is a simple protocol and a set of open-source libraries and programs that allows applications to broadcast information through text messages, with a subscription mechanism based on regular expressions. The project can be found at:

In the paparazzi project, Ivy is used to send telemetry data to where ever you want.

NOTE: Do not confuse this IVY with the Apache Ivy project.


The ivy-python package makes it possible to use the IVY libraries from within the Python programming language. The ivy-python package is architecture independent, so it can be downloaded from the Ubuntu or Debian paparazzi repository. However since this is the from scratch page we will download it from the official source repository via

$ mkdir -p ~/develop/ivy-python/
$ cd ~/develop/ivy-python/
$ svn co

Now we can build and install

$ cd ~/develop/ivy-python/trunk
$ sudo ./ install


To be able to use IVY-c, the libraries need to be installed. Source packages of ivy-c can be downloaded via:

$ mkdir -p ~/develop/ivy-c
$ cd ~/develop/ivy-c
$ svn co

To compile

$ cd ~/develop/ivy-c/trunk/src
$ make

It is possible you get errors of the test module when compiling, just ignore the messages, it is not important for the Paparazzi project. Contact the IVY team to help them also to resolve also the testing makefile issue.

Now install the compiled libraries

$ sudo make install


The Ivy-ocaml is a Library that make it possible to use Ivy via the Ocaml language.

$ mkdir -p ~/develop/ivy-ocaml
$ cd ~/develop/ivy-ocaml/
$ svn co

NOTE: If the above SVN repository does not work due to API incompatibilities get the ivy-ocaml source via

$ wget 

use newer:

Now we need to compile the source via

$ cd ~/develop/ivy-ocaml/trunk
$ make

Compilation works for 64 bit if you get an up-to-date version!

Compilation doesn't work on 64bit systems, if you just run 'make'

/usr/bin/ld: civyloop.o: relocation R_X86_64_32 against `timer_cb' can not be used when making a shared object; recompile with -fPIC

That's solved by just editing the Makefile. Change the line containing

        $(CC) -Wall -c $(OCAMLINC) $(GLIBINC) $<


       $(CC) -Wall -c -fPIC $(OCAMLINC) $(GLIBINC) $<

TODO: File a defect to the ivy-ocaml development team: A proper patch for the original sources would be one that checks if the system is a 64bit system, and if so set FPIC env variable. The following code at the beginning of the Makefile needs to be added just as it is done in the ivy-c Makefile

PERHAPS64:= $(shell uname -m | perl -ne "print /64/? '64' : ;")
ifeq ($(PERHAPS64), "64")

And then let the rule to compile all .c and .o files be like the following:

        $(CC) -Wall -c $(FPIC) $(OCAMLINC) $(GLIBINC) $<

Paparazzi Main sourcecode

To run the Ground control station and to be able to create airborne code for the Autopilot board and more one needs to get the Paparazzi source via

$ git clone

Compilation should work just fine for 64 bit with current versions, no need to change makefile anymore...

If you enter the sources directory and simply run make you will get the following error in an amd64 system:

cd sw/ground_segment/multimon; make PAPARAZZI_SRC=/home/roi/Codigo/paparazzi-dev/lenny_versions/paparazzi/temp PAPARAZZI_HOME=/home/roi/Codigo/paparazzi-dev/lenny_versions/paparazzi/temp
CC hdlc.c
hdlc.c:1: error: CPU you selected does not support x86-64 instruction set

This is because the code in sw/ground_segment/multimon/filter-i386.h which contains optimizations for some functions gets included and it doesn't work on amd64. filter.h says that filter-i386.h gets included if:

#ifdef ARCH_I386
#include "filter-i386.h"
#endif /* ARCH_I386 */

If we take a look at the Makefile (sw/ground_segment/multimon/Makefile):

CFLAGS          =-Wall -Wstrict-prototypes -I/usr/X11R6/include -I `ocamlc -where`
ifeq ($(DEBUG),y)
CFLAGS          +=-g -O -march=i486 -falign-loops=2 -falign-jumps=2 \
                 -falign-functions=2 -DARCH_I386
CFLAGS          +=-O3 -march=i486 -falign-loops=2 -falign-jumps=2 \
                 -falign-functions=2 -DARCH_I386

We'll have to change it to not define ARCH_I386, not optimize for i486 and add -fPIC. So we need to leave the above lines like:

CFLAGS          =-Wall -fPIC -Wstrict-prototypes -I/usr/X11R6/include -I `ocamlc -where`
ifeq ($(DEBUG),y)
CFLAGS          +=-g -O -falign-loops=2 -falign-jumps=2 \
CFLAGS          +=-O3 -falign-loops=2 -falign-jumps=2 \

Note that leaving the sources like this won't apply the optimisations if now you take the modified source and compile it in a 32bit system...

Now it will compile. run paparazzi and test it with a simulation via

$ ./paparazzi

NOTES: See also the main installation page

TIP: If you get the File "pprz.mli", line 149, characters 78-89: Error: Unbound type constructor Ivy.binding ...this happens when IVY libraries are not yet installed. How to do this, read the part on installing IVY on this page

Set the UDev rules

To be able to access the Hardware attached to your PC later on, rules must be set in your OS. By setting the correct rules a regular user can access USB and other devices, otherwise restricted for only the root user.

Now in a terminal

$ sudo nano /etc/udev/rules.d/91-paparazzi.rules

then select and copy (CTRL+V) the text below:

ACTION!="add|change", GOTO="paparazzi_rules_end"

SUBSYSTEM!="usb", GOTO="paparazzi_rules_end"

ENV{DEVTYPE}!="usb_device", GOTO="paparazzi_rules_end"

#SUBSYSTEMS=="usb", ATTRS{serial}=="*_fbw", NAME="test_fbw", SYMLINK+="paparazzi/%s{serial}", MODE="0666"

# MaxStream xbee pro box
SUBSYSTEMS=="usb", ATTRS{product}=="MaxStream PKG-U", KERNEL=="ttyUSB*", SYMLINK+="paparazzi/xbee", GROUP="plugdev"

# bare FTDI chip without EEPROM
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", KERNEL=="ttyUSB*", SYMLINK+="paparazzi/serial", GROUP="plugdev" 

# all (fake VID 0x7070) LPCUSB devices (access through libusb)
SUBSYSTEMS=="usb", ATTRS{idVendor}=="7070", GROUP="plugdev"

# FTDI 2232 parallel converter / Amontec JTAG-Tiny (access through libftdi)
SUBSYSTEMS=="usb",  ATTRS{idVendor}=="0403", ATTRS{idProduct}=="cff8", GROUP="plugdev"

# FTDI 2232 based jtag for Lisa/L
SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010", MODE="0666", GROUP="plugdev" 

# make joysticks/gamepads readable on event interface (writeable for force feedback), see
KERNEL=="event*", IMPORT{program}=" %p", NAME="input/%k", GROUP="plugdev", MODE="0640" ENV{FF_DEVICE}=="1", MODE="0660" 

#needed for lisa usb upload
SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010", MODE="0666", GROUP="plugdev"

# FTDI with uBlox direct on USB
SUBSYSTEMS=="usb", ATTRS{idVendor}=="1546", ATTRS{idProduct}=="01a5", KERNEL=="ttyACM*", SYMLINK+="paparazzi/acm", GROUP="plugdev"


Past the text in the terminal window via CTRL+SHIFT+V and save the file via CTRL+X. Test via

$ udevadm info -q all -n /dev/paparazzi/serial

If you want to learn more about what UDEV is, there is a very informative page about udev here

The depriciated -mapcs-32 option

The option "-mapcs-32" is only available with very old tool chain versions e.g. GCC-3.3.x. More recent tool chains will either require "-mabi=apcs-gnu" (non-EABI-compliant) or "-mabi=aapcs-linux" (EABI-compliant). To have an overview of all flags go here

By changing -mapcs-32 with -Wa,-mapcs-32 compilation will work with more recent compilers and we have backward compatibility with the old flag for older compilers. The option -Wa,-mapcs-32 is doing the following: -Wa,option : Pass option as an option to the assembler. If option contains commas, it is split into multiple options at the commas.

The -mapcs-32 option generates code for a processor running with a 32-bit program counter and conforming to the function calling standards for the APCS 32-bit option. If interested in depth what APCS is read the following:

The gcc flag -mapcs-32 was deprecated since gcc-3.4.0 and finally removed in gcc-4.0.0 which unconditionally generates 32bit ARM code. You should not need to pass this flag to the assembler either but it might not hurt for backwards compatibility with older compilers, so it's best to leave it in with the -Wa, option metho

Useful links