Development headers 'not found' when running passenger apache 2 module installer, but they are installed

Question

I have been trying to install Passenger on a vps with the following:

• CentOS release 4.5 (Final)
• gcc version 3.4.6 20060404 (Red Hat 3.4.6-8) box
• Apache/2.2.11 (Unix)
• Ruby Enterprise Edition
• Ruby 1.8.6
• Gem 1.3.5

I installed the gem

gem install passenger

when i run passenger-install-apache2-module I get the following message indicating I am missing development headers:

• GNU C++ compiler... found at /usr/bin/g++
• Curl development headers with SSL support... not found
• OpenSSL development headers... not found
• Zlib development headers... not found
• Ruby development headers... found
• OpenSSL support for Ruby... found
• RubyGems... found
• Rake... found at /opt/ruby-enterprise-1.8.6-20090201/bin/rake
• rack... found
• Apache 2... found at /usr/local/apache/bin/httpd
• Apache 2 development headers... found at /usr/local/bin/apxs
• fastthread... found
• Apache Portable Runtime (APR) development headers... found at /usr/local/apache/bin/apr-1-config
• Apache Portable Runtime Utility (APU) development headers... found at /usr/local/apache/bin/apu-1-config

I then following the provided instructions on how to install each:

# yum install curl-devel
Setting up Install Process
Setting up repositories
update                    100% |=========================|  951 B    00:00     
base                      100% |=========================| 1.1 kB    00:00     
addons                    100% |=========================|  951 B    00:00     
extras                    100% |=========================| 1.1 kB    00:00     
Reading repository metadata in from local files
Parsing package install arguments
Nothing to do

# yum install openssl-devel
Setting up Install Process
Setting up repositories
update                    100% |=========================|  951 B    00:00     
base                      100% |=========================| 1.1 kB    00:00     
addons                    100% |=========================|  951 B    00:00     
extras                    100% |=========================| 1.1 kB    00:00     
Reading repository metadata in from local files
Parsing package install arguments
Nothing to do

# yum install zlib-devel 
Setting up Install Process
Setting up repositories
update                    100% |=========================|  951 B    00:00     
base                      100% |=========================| 1.1 kB    00:00     
addons                    100% |=========================|  951 B    00:00     
extras                    100% |=========================| 1.1 kB    00:00     
Reading repository metadata in from local files
Parsing package install arguments
Nothing to do

Does this indicate that they are already installed? Do I have to tell passenger where to find these? My site is currently down, so any help would be greatly appreciated.

Answer 1

I had this same problem and solved it by doing this:

sudo yum install zlib-devel e2fsprogs-devel krb5-devel libidn-devel

That took care of it. I found this solution on the code.google.com site mentioned above, but noticed that there had been some new activity since this question was posted on Nov 24, 2010.

I followed the instructions in comment #18, and it worked for me. Hope it helps.