gem安装redis库时报错

报错一：

[root@Redis-1 software]# /usr/local/ruby/bin/gem install redis-3.2.2.gem 
ERROR: Loading command: install (LoadError)
 cannot load such file -- zlib
ERROR: While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

【解决】

1. yum -y install zlib-devel

2. 进入ruby源码文件夹，安装ruby自身提供的zlib包：

   cd ruby-2.4.4/ext/zlib/
    /usr/local/ruby/bin/ruby extconf.rb 
    make
    make install

2.1 报错：

make: *** No rule to make target `/include/ruby.h', needed by `zlib.o'. Stop.

打开：ext/zlib/Makefile文件，找到#zlib.o: $(top_srcdir)/include/ruby.h换成zlib.o: ../../include/ruby.h

#zlib.o: $(top_srcdir)/include/ruby.h
zlib.o: ../../include/ruby.h

报错二：

[root@Redis-1 software]# /usr/local/ruby/bin/gem install redis-4.1.0.gem 
ERROR: While executing gem ... (Gem::Exception)
    Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources

【解决】

1. 安装openssl：yum（本环境使用）或者源码

2. 进入ruby源码文件夹，安装ruby自身提供的openssl包：

   cd ruby-2.4.4/ext/openssl
   # 找到各个组件的路径
   /usr/local/ruby/bin/ruby extconf.rb --with-openssl-include=/usr/include/openssl/ --with-openssl-lib=/usr/lib64/openssl/
   make 
   make install

2.1. make报错：

make: *** No rule to make target `/thread_native.h', needed by `ossl.o'. Stop.

打开Makefile文件：增长top_srcdir = /opt/software/ruby-2.4.4路径

topdir = /usr/local/ruby/include/ruby-2.4.0
top_srcdir = /opt/software/ruby-2.4.4
hdrdir = $(topdir)
arch_hdrdir = /usr/local/ruby/include/ruby-2.4.0/x86_64-linux