升级ruby版本 使用源码方式

1、下载Ruby源码
wget http://cache.ruby-lang.org/pub/ruby/2.5/ruby-2.5.8.tar.gz
2、解压
tar xzvf ruby-2.5.8.tar.gz
3、进入ruby-2.5.8 目录
4、安装
mkdir /usr/local/ruby
./config -prefix=/usr/local/ruby
make && make install  
5、/etc/profile后加入
export PATH=/usr/local/ruby/bin:$PATH 
souce /etc/profile
错误undefined method `invoke_with_build_args' for nil:NilClass
解决

错误No rule to make target `/include/ruby.h', needed by `zlib.o'.  Stop.
解决
vi /usr/local/ruby-2.5.8/ext/zlib/Makefile
#zlib.o: $(top_srcdir)/include/ruby.h #把这一行替换成下面一行
yum install zlib-devel

zlib.o: ../../include/ruby.h
/usr/local/ruby-2.5.8/ext/zlib/ruby ./extconf.rb 
make && make install
/usr/local/ruby-2.5.8/ext/openssl/ruby ./extconf.rb
make && make install