The following is from the above for v1.9.1. It states that there is a ct-ng configuration for ARM toolchain generation, there is no such configuration.
In the Zephyr kernel source tree we provide two configurations for both ARM and X86 that can be used to pre-select the options needed for building the toolchain. The configuration files can be found in $ZEPHYR_BASE/scripts/cross_compiler/.
Currently the following configurations are provided:
i586.config: for standard ABI, for example for Galileo and qemu_x86
iamcu.config: for IAMCU ABI, for example for the Arduino 101
nios2.config: for Nios II boards
The following is from the above for v1.9.1. It states that there is a ct-ng configuration for ARM toolchain generation, there is no such configuration.