Linux下安装ruby

第一步：

$wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz

$ tar zxf yaml-0.1.4.tar.gz

$ cd yaml-0.1.4/

$ ./configure --prefix=/home/root/ruby

$ make

$ make install

第二步：

$wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz

$ tar zxf ruby-1.9.3-p0.tar.gz

$cd ruby-1.9.3-p0

$ ./configure--prefix=/home/root/ruby --with-opt-dir=/home/root/ruby

$ vim ext/Setup # open themodules you want 

$ vim Makefile

CFLAGS =  ${cflags}-I/home/root/ruby/include # the location where yaml.h fileexist

INCFLAGS = -I. -I$(arch_hdrdir) -I$(hdrdir) -I$(srcdir)-I/home/root/ruby/include # the location where yaml.h fileexist

$ make

$ make install

第三步：

rubygems安装  （略）

ps：

$ bin/gem -v

/home/root/ruby/lib/ruby/1.9.1/yaml.rb:56:in`<top (required)>':

It seems your ruby installation is missing psych (for YAMLoutput).

To eliminate this warning, please install libyaml andreinstall your ruby.

1.8.11
出现此提示说明第一步未安装