Redmine

System version：CentOS release 6.4 (Final) x64
Web version: nginx 1.7.11,Nginx is the source installation,command：passenger-install-nginx-module,choice 2,add Parameter: --user=nginx --group=nginx
Redmine version：redmine-3.0.5
Ruby version: ruby 1.9.3p551
Bundle version: Bundler version 1.10.6
Gem version: 2.4.8
Mysql version: 5.5.25 mysql is the source installation
rvm version： rvm 1.26.11 (master) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]
gem sources：https://ruby.taobao.org/ Because you cannot access https://ruby. taobao. org/

Rmagick installation steps:

Environment Package：
yum -y install libyaml libyaml-devel zlib zlib-devel curl-devel openssl-devel httpd-devel apr-devel apr-util-devel gcc ruby-devel gcc-c++ make postgresql-devel sqlite-devel perl-LDAP mod_perl perl-Digest-SHA rubygems php php-mysql php-gd php-imap php-ldap php-mbstring php-odbc php-pear php-xml php-xmlrpc php-pecl-apc php-soap readline-devel libffi-devel

yum -y install ImageMagick*
yum -y install rubygems*
yum -y install ruby-RMagick*
gem install rmagick
gem install railties -v '4.2.3'
gem install json -v '1.8.3'
gem install redcarpet -v '3.3.3'

bundle install -V --without development test rmagick

why the rmagick display exclamation, please help me to check it ,thank you