gcc-arm-none-eabi-source 15:9-2019-q4-0ubuntu1 (amd64 binary) in ubuntu focal

 Bare metal C and C++ compiler for embedded ARM chips using Cortex-M, and
 Cortex-R 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.