{ git } Centos Git1.7.1升级到Git2.2

###安装需求
># yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc
># yum install  gcc perl-ExtUtils-MakeMaker   
   
＃error: /utf8.c:463: undefined reference to `libiconv'

># wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz
># tar zxvf libiconv-1.14.tar.gz 
># cd libiconv-1.14
># ./configure --prefix=/usr/local/libiconv
># make && make install

###卸载1.7
yum remove git

###下载2.2.1并添加到环境变量
># wget https://github.com/git/git/archive/v2.2.1.tar.gz
># tar zxvf v2.2.1.tar.gz
># cd git-2.2.1
># make configure
># ./configure --prefix=/usr/local/git --with-iconv=/usr/local/libiconv
># make all doc
># make install install-doc install-html
># echo "export PATH=$PATH:/usr/local/git/bin" >> /etc/bashrc
># source /etc/bashrc

###查看版本号
git --version

##log4go
forbidden,需要下载