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在编译Linux内核时出现错误：

wit@ubuntu:/home/linux-5.4.14# make vexpress_defconfig

  LEX     scripts/kconfig/lexer.lex.c /bin/sh: 1: flex: not found make[1]: *** [scripts/Makefile.host:9: scripts/kconfig/lexer.lex.c] Error 127 make: *** [Makefile:568: vexpress_defconfig] Error 2  

wit@ubuntu:/home/linux-5.4.14# make menuconfig

  UPD     scripts/kconfig/mconf-cfg   HOSTCC  scripts/kconfig/mconf.o   HOSTCC  scripts/kconfig/lxdialog/checklist.o   HOSTCC  scripts/kconfig/lxdialog/inputbox.o   HOSTCC  scripts/kconfig/lxdialog/menubox.o   HOSTCC  scripts/kconfig/lxdialog/textbox.o   HOSTCC  scripts/kconfig/lxdialog/util.o   HOSTCC  scripts/kconfig/lxdialog/yesno.o   LEX     scripts/kconfig/lexer.lex.c /bin/sh: 1: flex: not found make[1]: *** [scripts/Makefile.host:9: scripts/kconfig/lexer.lex.c] Error 127 make: *** [Makefile:568: menuconfig] Error 2

解决方法：分别安装词法解析器flex，和语法解析器bison：

# apt install flex# pt install bison

 

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