make: xtensa-lx106-elf-gcc: Command not found expr: syntax error /bin/sh: 1: xtensa-lx106-elf-gcc: not found /bin/sh: 1: xtensa-lx106-elf-gcc: not found Toolchain path: WARNING: Failed to find Xtensa toolchain, may need to alter PATH or set one in the configuration menu Python ...