meson/cross/armclang.txt

# This file assumes that path to the arm compiler toolchain is added
# to the environment(PATH) variable, so that Meson can find
# the armclang, armlink and armar while building.
[binaries]
c = 'armclang'
cpp = 'armclang'
ar = 'armar'
strip = 'armar'

[built-in options]
# The '--target', '-mcpu' options with the appropriate values should be mentioned
# to cross compile c/c++ code with armclang.
c_args      = ['--target=arm-arm-none-eabi', '-mcpu=cortex-m0plus']
cpp_args    = ['--target=arm-arm-none-eabi', '-mcpu=cortex-m0plus']

[host_machine]
system = 'bare metal'      # Update with your system name - bare metal/OS.
cpu_family = 'arm'
cpu = 'Cortex-M0+'
endian = 'little'