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Starterware/STARTERWARE-SITARA: how to build with gcc

Part Number: STARTERWARE-SITARA

Tool/software: Starterware

Hey everyone,

i would like to make a simple project for my beaglebone white in which i would learn to handle interrupts.
For some reasons, i need to use starterware (version 2.00.01.01) and build my files via code composer studio (version 6.1.0.00104) with compiler version:GNU v4.8.4 (Linaro).
So my question is:
except for the source and header files that i have created which files are necessary in order to build successfully my project?

While trying to build successfully my project i noticed that i need to also provide interrupt.c from AM335X_StarterWare_02_00_01_01/system_config/armv7a/am335x/
and cpu.c from (i guess) AM335X_StarterWare_02_00_01_01/system_config/armv7a/gcc/

After building my project and loading the executable to my beaglebone it seems like the interrupts are not working. I mean i can not trigger any interrupt...
(i know that my code is NOT wrong since i have copy pasted it in the example dmtimer project of starterware and it works).

Do i also have to include files such as cp15.S and init.S from the latter path?Or maybe exceptionhandler.S from AM335X_StarterWare_02_00_01_01/system_config/armv7a/am335x/gcc/   ?
What i have noticed is that when i include init.S i get the following error:
selected processor does not support ARM mode `fmxr FPEXC,r0

Please, someone indicate me a solution..
Thanks in advance