Build error on Ubuntu 20.04: riscv64-unknown-elf-gcc: fatal error: cannot execute 'cc1': execvp: No such file or directory

[zhengzhide]

根据官方环境搭建指导（https://aithinker.blog.csdn.net/article/details/125604649），编译碰到这个问题，试过一些方法，例如apt-get install gcc-g++，等，没有解决，请问谁能给些帮助？谢谢！

de@z:/data/repos/wifible/Ai-Thinker-WB2/applications/bluetooth/ble_master$ ./genromap
****** Please SET BL60X_SDK_PATH ******
****** Trying SDK PATH [/data/repos/wifible/Ai-Thinker-WB2/applications/bluetooth/ble_master/../../..]
Your configuration chipname is Ai-Thinker Ai-WB2 Wi-Fi&BLE Module
AS build_out/bl602/evb/src/boot/gcc/entry.o
AS build_out/bl602/evb/src/boot/gcc/start.o
CC build_out/bl_os_adapter/bl_os_adapter/bl_os_hal.o
CC build_out/bl602/evb/src/strntoumax.o
CC build_out/bl602/evb/src/debug.o
CC build_out/bl602/bfl_main.o
CC build_out/blcrypto_suite/src/blcrypto_suite_bignum.o
CC build_out/bl602_std/bl602_std/StdDriver/Src/bl602_uart.o
CC build_out/bl602_std/bl602_std/StdDriver/Src/bl602_adc.o
CC build_out/blcrypto_suite/src/blcrypto_suite_ecp.o
riscv64-unknown-elf-gcc: fatal error: cannot execute 'cc1': execvp: No such file or directory
riscv64-unknown-elf-gcc: fatal error: cannot execute 'cc1': execvp: No such file or directory
compilation terminated.
compilation terminated.
CC build_out/ble_master/ble_central_api.o
make[1]: *** [/data/repos/wifible/Ai-Thinker-WB2/make_scripts_riscv/component_wrapper.mk:313: evb/src/boot/gcc/entry.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [/data/repos/wifible/Ai-Thinker-WB2/make_scripts_riscv/component_wrapper.mk:313: evb/src/boot/gcc/start.o] Error 1
riscv64-unknown-elf-gcc: fatal error: cannot execute 'cc1': execvp: No such file or directory
compilation terminated.
make[1]: *** [/data/repos/wifible/Ai-Thinker-WB2/make_scripts_riscv/component_wrapper.mk:313: bl_os_adapter/bl_os_hal.o] Error 1
riscv64-unknown-elf-gcc: fatal error: cannot execute 'cc1': execvp: No such file or directory
compilation terminated.
make: *** [/data/repos/wifible/Ai-Thinker-WB2/applications/bluetooth/ble_master/../../../make_scripts_riscv/project.mk:577: component-bl_os_adapter-build] Error 2
make: *** Waiting for unfinished jobs....
make[1]: *** [/data/repos/wifible/Ai-Thinker-WB2/make_scripts_riscv/component_wrapper.mk:313: evb/src/debug.o] Error 1