cmake/rv-virt: usage error with Ubuntu stock gcc-riscv64-unknown-elf toolchain

[yf13]

When using CMake subsystem on Ubuntu Jammy with stock gcc-riscv64-unknown-elf toolchain, got the following error:

$ cmake -S ~/Projects/Nuttx/nuttx/ -DBOARD_CONFIG=rv-virt/nsh64 
-- Initializing NuttX
--   Board:  rv-virt
--   Config: nsh64
--   Appdir: /home/yf/Projects/Nuttx/nuttx/../apps
-- The C compiler identification is GNU 10.2.0
-- The CXX compiler identification is GNU 10.2.0
-- The ASM compiler identification is GNU
-- Found assembler: /usr/bin/riscv64-unknown-elf-gcc
riscv64-unknown-elf-gcc: error:  -Wstrict-prototypes -fno-common -Wall -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas: No such file or directory
riscv64-unknown-elf-gcc: error: unrecognized command-line option '-mcpu=sifive-u54'
riscv64-unknown-elf-gcc: error: unrecognized command-line option '-mcpu=sifive-u54'
riscv64-unknown-elf-gcc: error:  -Wstrict-prototypes -fno-common -Wall -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas: No such file or directory
riscv64-unknown-elf-gcc: error: unrecognized command-line option '-mcpu=sifive-u54'
riscv64-unknown-elf-gcc: error: unrecognized command-line option '-mcpu=sifive-u54'
-- Configuring done
-- Generating done
-- Build files have been written to: /home/yf/tmp/aaa

[anchao]

You need to update your toolchain to a newer version. These processor modules are only supported in gcc versions after 12:

nuttx/tools/ci/cibuild.sh

Lines 357 to 361 in 282feec

	cd "${tools}"
	wget --quiet https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack/releases/download/v13.2.0-2/xpack-riscv-none-elf-gcc-13.2.0-2-${flavor}.tar.gz
	tar zxf xpack-riscv-none-elf-gcc-13.2.0-2-${flavor}.tar.gz
	mv xpack-riscv-none-elf-gcc-13.2.0-2 riscv-none-elf-gcc
	rm xpack-riscv-none-elf-gcc-13.2.0-2-${flavor}.tar.gz