报错：
LEX scripts/kconfig/lexer.lex.c
/bin/sh: 1: flex: not found
scripts/Makefile.host:9: recipe for target ‘scripts/kconfig/lexer.lex.c’ failed
make[2]: *** [scripts/kconfig/lexer.lex.c] Error 127
Makefile:567: recipe for target ‘imx_v8_defconfig’ failed
make[1]: *** [imx_v8_defconfig] Error 2
make[1]: Leaving directory ‘/home/forlinx/imx8mq/OK8MQ-linux-sdk/OK8MQ-linux-kernel’
Makefile:11: recipe for target ‘linux’ failed
make: *** [linux] Error 2
原因：
缺少库
解决：
sudo apt-get install flex
sudo apt-get install bison