make menuconfig提示
Build dependency: Please install the openssl library (with development headers)
Build dependency: Please install the Subversion client
1.第一条是因为没有安装openssl
sudo apt-get install libssl-dev
2.第二条是因为没有安装SVN
因为平时都是用Git，故没有也不想安装，直接将判断之处屏蔽掉
vim include/prereq-build.mk
#$(eval $(call SetupHostCommand,svn,Please install the Subversion client, \
# svn --version | grep Subversion))