Hello, I have some issue with building an ARM demo code. What i'm running is Eclise Helios with Zyling CDT, yagarto tools, OpenOCD 0.6.1, Cygwin basically i downloaded Olimex OpenOCD Development Tools (which included all of the above) as i need to debug a SAM7-EX256 board. After building the project i get the message - "/bin/sh: arm-elf-as: command not found" I tried to google but couldn't find any solutions to this issue, also i'm running windows 7, all path environment's are added. I can build simple stuff like "Hello World" without a problem. Here's what i get when i try to build my source file for the ARM: make -j all Building file: ../MyNewEmpty.c Building file: ../crt.asm Invoking: Cygwin C Compiler arm-elf-gcc -I"C:\Progra~1\yagarto\arm-elf\include" -I"C:\OlimexODS\examples\LIB_AT91SAM7" -I"C:\OlimexODS\examples\LIB_LCDGE8" -I"C:\OlimexODS\examples\LIB_SAM7EX256" -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"MyNewEmpty.d" -MT"MyNewEmpty.d" -o"MyNewEmpty.o" "../MyNewEmpty.c" /bin/sh: arm-elf-gcc: command not found Invoking: GCC Assembler make: *** [MyNewEmpty.o] Error 127 arm-elf-as -o"crt.o" "../crt.asm" subdir.mk:22: recipe for target 'MyNewEmpty.o' failed make: *** Waiting for unfinished jobs.... subdir.mk:29: recipe for target 'crt.o' failed /bin/sh: arm-elf-as: command not found make: *** [crt.o] Error 127 If anyone can help me with this will be greatly appreciated ! I have mentioned this also in the Eclipse CDT forums where some people suggested this: "You are missing the whole GCC compiler toolset, starting with arm-elf-gcc. Maybe the PATH is not set up to include it. The GNU compiler set needs the compiler driver (gcc), preprocessor (cpp), compiler itself (cc1), assembler (as) and linker (ld). For bare-bones hardware targets you may need some utilities, like objcopy. The program names are often prepended with codes telling which configuration the toolset has. The arm-elf-* toolset is pretty old, maybe your old Eclipse setup is no more compatible with the current compiler (probably arm-none-eabi-*). A good option to get pre-built arm-non-eabi tools is from Launchpad: https://launchpad.net/gcc-arm-embedded " I have installed the arm-non-eabi that was suggested added to tne PATH environmentals and still doesnt work. Also for the GCC compiler toolset i got Cygwin installed isnt that enough ? Thank you. I would really appreciate if you can help !