gcc-arm-none-eabi-source 15:6.3.1+svn253039-2 (i386 binary) in ubuntu cosmic

 Bare metal compiler for embedded ARM chips using Cortex-M, Cortex-R and
 Cortex-A processors.
 This package is based on the GNU ARM toolchain provided by ARM.
 .
 This package contains the sources and patches which are needed
 to build the GNU Compiler Collection (GCC) for embedded ARM chips.