Ruby on rails 一个奇怪的安装错误：异常：没有这样的文件或目录（Errno:：enoint）

我尝试安装Phusion Passenger for Ruby on Rails应用程序，如下所示：

su -
gem install passenger
export HTTPD=/usr/local/apache2/bin/httpd
export APXS2=/usr/local/apache2/bin/apxs
export APR_CONFIG=/usr/local/apr/bin/apr-1-config
export APU_CONFIG=/usr/local/apr/bin/apu-1-config
passenger-install-apache2-module

然后我收到一条错误消息：

EXCEPTION: No such file or directory - /usr/local/apache2/bin/apxs (Errno::ENOENT)

我确认了这是不是真的，但肯定是真的

ls -l /usr/local/apache2/bin/apxs
-rwxr-xr-x. 1 root root 23540 Jul  9 06:41 /usr/local/apache2/bin/apxs

这是什么意思？我找不到下一步该做什么。 请帮忙

环境：虚拟箱和流浪汉

操作系统：CentOS-6.5

ruby:2.1.2

我看到的错误消息和堆栈跟踪如下：

Sanity checking Apache installation...
--------------------------------------------
*** EXCEPTION: No such file or directory - /usr/local/apache2/bin/apxs (Errno::ENOENT)
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache.rb:508:in ``'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache.rb:508:in `apache2_sbindir'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info.rb:115:in `apache2_sbindir'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache.rb:462:in `find_apache2_executable'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache.rb:64:in `apache2ctl'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info.rb:115:in `apache2ctl'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:133:in `block in detect_one'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:226:in `add_result'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:118:in `detect_one'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:112:in `block in detect_all'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:111:in `each'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/platform_info/apache_detector.rb:111:in `detect_all'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:195:in `check_whether_there_are_multiple_apache_installs'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:127:in `run_steps'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion_passenger/abstract_installer.rb:71:in `run'
    /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:863:in `<top (required)>'
    /usr/local/bin/passenger-install-apache2-module:23:in `load'
    /usr/local/bin/passenger-install-apache2-module:23:in `<main>'

检查Apache安装的健全性。。。
--------------------------------------------
***例外：没有这样的文件或目录-/usr/local/apache2/bin/apxs（Errno:：enoint）
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache.rb:508:in``'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache.rb:508:in'apache2\u sbindir'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info.rb:115:in'apache2\u sbindir'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache.rb:462:in“find\u apache2\u executable”
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache.rb:64:in'apache2ctl'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info.rb:115:in'apache2ctl'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u-passenger/platform\u-info/apache\u-detector.rb:133:in“block in-detect\u one”
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache\u detector.rb:226:in'add\u result'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache\u detector.rb:118:in'detect\u one'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u-passenger/platform\u-info/apache\u-detector.rb:112:in'block-in-detect\u all'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache\u detector.rb:111:in'each'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/platform\u info/apache\u detector.rb:111:in“detect\u all”
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:195:“检查是否有多个apache安装”
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:127:在“运行步骤”中
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/lib/phusion\u passenger/abstract\u installer.rb:71:in'run'
/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.45/bin/passenger-install-apache2-module:863:in`'
/usr/local/bin/PASSOR-install-apache2-module:23:在“装载”中
/usr/local/bin/passenger-install-apache2-module:23:in`'

我现在已经明白了原因

LD_LIBRARY_路径也必须导出

毕竟，我成功地构建了apache和passenger

yum -y install pcre-devel.x86_64
cd /usr/local/src
wget http://ftp.riken.jp/net/apache//httpd/httpd-2.4.9.tar.gz
wget http://ftp.kddilabs.jp/infosystems/apache//apr/apr-1.5.1.tar.gz
wget http://ftp.kddilabs.jp/infosystems/apache//apr/apr-util-1.5.3.tar.gz
tar xvfz httpd-2.4.9.tar.gz
tar xvfz apr-1.5.1.tar.gz
tar xvfz apr-util-1.5.3.tar.gz
mv apr-1.5.1      /usr/local/src/httpd-2.4.9/srclib/apr
mv apr-util-1.5.3 /usr/local/src/httpd-2.4.9/srclib/apr-util
cd /usr/local/src/httpd-2.4.9
./configure --with-included-apr --enable-mods-shared=all --enable-mpms-shared=all --enable-modules=all --enable-ssl  --with-pcre=/usr/bin/pcre-config
make
make install
yum -y install curl-devel
gem install passenger
export HTTPD=/usr/local/apache2/bin/httpd
export APXS2=/usr/local/apache2/bin/apxs
export APR_CONFIG=/usr/local/apache2/bin/apr-1-config
export APU_CONFIG=/usr/local/apache2/bin/apu-1-config
export LD_LIBRARY_PATH=/usr/local/apache2/lib:$LD_LIBRARY_PATH
passenger-install-apache2-module