This page details the installation steps:

Installing ARM toolchain

You can find the ARM toolchain at https://launchpad.net/gcc-arm-embedded. Version 4.7 is the latest currently used: https://launchpad.net/gcc-arm-embedded/4.7/4.7-2013-q3-update

The installation consists in the following steps:

1. Download the toolchain
2. Inflate (unzip) the toolchain
3. Modify the PATH environment variable so Eclipse can invoke the compiler.

$ sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
$ sudo apt-get update
$ sudo apt-get install gcc-arm-none-eabi

$ arm-none-eabi-gcc --version
arm-none-eabi-gcc (4.8.2-14ubuntu1+6) 4.8.2
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Installing Eclipse

• Download Eclipse CDT for C/C++ developers from http://www.eclipse.org/downloads/packages/eclipse-ide-cc-developers/keplersr1
  • Note: Do not install Eclipse using apt.  It is outdated and the plugins require a more recent version of Eclipse
• unzip eclipse in your favorite folder e.g., /opt/eclipse
• Execute eclipse and go to Help->Install New Software.

• Add gnu-arm eclipse plug-in url and install the plug-in. Use the following url.

  http://gnuarmeclipse.sourceforge.net/updates

• Restart eclipse when installation finishes

Testing

• Once the gnu-arm plug-in is installed you can test that everything works by creating a test project.
• To do so, click File > New > C Project and select ARM Cross Target Application

  
• Make sure to select the right cross compiler. In my case I choose ARM Linux GCC (GNUARM). If you are using Code Sourcery or Yagarto or another tool chains, select the appropriate.
• Name your project (e.g. "test") and click Finish.
• Right click on the project and select properties:
  
  
• Select the micro-controller architecture, for example Cortex M4

• Move to the "assembler" option and set up the path to your gcc-arm-none/ directory. Select arm-none-eabi-gcc

  If you have update your computer PATH environment variable, you can just enter arm-none-eabi-gcc, without the full path.

  

• Repeat the same steps for the compiler, which in our case is also arm-none-eabi-gcc.
  
  
• Repeat the same steps for the linker, which in our case is also arm-none-eabi-gcc.
  
  
• Configure the "Flash image creator" as follows:
  
  
• Configure the "Create Listing" as follows:
  
  
• Configure the "Print Size" as follows:
  
  
• At this point, configure any extra options you might want, such as optimizations and debug levels.
• Click OK to apply all changes.

• Create a file to test the compiler. You can toggle an LED according to your hardware specification or simply code a while loop and test the compiler.

  int main(void){
      int i = 0;
      while (i < 10) {
         i++;
      }
      return i;
  }

• Right-click on the project and select Build Project. Based on your configuration, Eclipse invokes the ARM GCC compiler, linker, flash image creator, and size printer tools. 

  15:49:03 **** Incremental Build of configuration Debug for project openwsn ****
  make all
  Building file: ../src/main.c
  Invoking: ARM Linux GCC C Compiler
  arm-none-eabi-gcc -O0 -Wall -Wa,-adhlns="src/main.o.lst" -c -fmessage-length=0 -MMD -MP -MF"src/main.d" -MT"src/main.d" -mcpu=cortex-m4 -mthumb -g3 -gdwarf-2 -o "src/main.o" "../src/main.c"
  Finished building: ../src/main.c
  
  Building target: openwsn.elf
  Invoking: ARM Linux GCC C Linker
  arm-none-eabi-gcc -nostartfiles -Wl,-Map,openwsn.map -mcpu=cortex-m4 -mthumb -g3 -gdwarf-2 -o "openwsn.elf"  ./src/main.o   
  /home/xvilajosana/Development/tools/gcc-arm-none-eabi-4_7/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008000
  Finished building target: openwsn.elf
  
  Invoking: ARM Linux GNU Create Flash Image
  arm-none-eabi-objcopy -O ihex openwsn.elf  "openwsn.hex"
  Finished building: openwsn.hex
  
  Invoking: ARM Linux GNU Create Listing
  arm-none-eabi-objdump -h -S openwsn.elf > "openwsn.lst"
  Finished building: openwsn.lst
  
  Invoking: ARM Linux GNU Print Size
  arm-none-eabi-size  --format=berkeley openwsn.elf
     text       data        bss        dec        hex    filename
       44          0          0         44         2c    openwsn.elf
  Finished building: openwsn.siz
  
  15:49:03 Build Finished (took 114ms)