修改buildroot的权限为777，进入buildroot根目录，
执行make menuconfig，出现如下错误（我用的是ubuntu18.10中文版）：
samba@ubuntu64:~/share/project/buildroot-2018.11.1$ make menuconfig
mkdir -p /home/samba/share/project/buildroot-2018.11.1/output/build/buildroot-config/lxdialog
PKG_CONFIG_PATH="" make CC="/usr/bin/gcc" HOSTCC="/usr/bin/gcc" \
obj=/home/samba/share/project/buildroot-2018.11.1/output/build/buildroot-config -C support/kconfig -f Makefile.br mconf
*** Unable to find the ncurses libraries or the
*** required header files.
*** 'make menuconfig' requires the ncurses libraries.
***
*** Install ncurses (ncurses-devel or libncurses-dev
*** depending on your distribution) and try again.
***
make[2]: *** [Makefile:253：/home/samba/share/project/buildroot-2018.11.1/output/build/buildroot-config/dochecklxdialog] 错误 1
make[1]: *** [Makefile:899：/home/samba/share/project/buildroot-2018.11.1/output/build/buildroot-config/mconf] 错误 2
make: *** [Makefile:84：_all] 错误 2
----------------------------华丽的分割线----------------------------------------
解决办法：
安装这么个东西
sudo apt-get install ncurses-dev
安装完后，发现成功解决上述问题。