Installing fcgi fails on Heroku - ruby-on-rails

Question

I'm trying to push my Rails project onto Heroku. It gives some error about fcgi. On my machine, I'm able to install fcgi just fine. I can do gem install fcgi -v '0.8.8' on my machine without error.
-----> Ruby/Rails app detected
-----> Using Ruby version: ruby-2.0.0
-----> Installing dependencies using Bundler version 1.3.2
Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
Fetching gem metadata from http://rubygems.org/.........
Fetching gem metadata from http://rubygems.org/..
Installing rake (0.9.2.2)
Installing abstract (1.0.0)
Installing activesupport (3.0.11)
Installing builder (2.1.2)
Installing i18n (0.5.0)
Installing activemodel (3.0.11)
Installing erubis (2.6.6)
Installing rack (1.4.0)
Installing rack-mount (0.7.1)
Installing rack-test (0.6.1)
Installing tzinfo (0.3.33)
Installing actionpack (3.0.11)
Installing mime-types (1.16)
Installing polyglot (0.3.1)
Installing treetop (1.4.10)
Installing mail (2.4.4)
Installing actionmailer (3.0.11)
Installing arel (2.0.9)
Installing activerecord (3.0.11)
Installing activeresource (3.0.11)
Installing bigdecimal (1.1.0)
Installing fcgi (0.8.8)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/tmp/build_ljhotq40guh7/vendor/ruby-2.0.0/bin/ruby extconf.rb
checking for fcgiapp.h... no
checking for fastcgi/fcgiapp.h... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/tmp/build_ljhotq40guh7/vendor/ruby-2.0.0/bin/ruby
--with-fcgi-dir
--without-fcgi-dir
--with-fcgi-include
--without-fcgi-include=${fcgi-dir}/include
--with-fcgi-lib
--without-fcgi-lib=${fcgi-dir}/
Gem files will remain installed in /tmp/build_ljhotq40guh7/vendor/bundle/ruby/2.0.0/gems/fcgi-0.8.8 for inspection.
Results logged to /tmp/build_ljhotq40guh7/vendor/bundle/ruby/2.0.0/gems/fcgi-0.8.8/ext/fcgi/gem_make.out
An error occurred while installing fcgi (0.8.8), and Bundler cannot continue.
Make sure that `gem install fcgi -v '0.8.8'` succeeds before bundling.
Gemfile:
source 'http://rubygems.org'
gem 'rails', '3.0.11'
#gem 'mysql2', '~> 0.2.17'
group :development, :test do
gem 'sqlite3'
end
group :production do
gem 'pg'
end
# Use unicorn as the web server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger (ruby-debug for Ruby 1.8.7+, ruby-debug19 for Ruby 1.9.2+)
# gem 'ruby-debug'
# gem 'ruby-debug19', :require => 'ruby-debug'
# Bundle the extra gems:
# gem 'bj'
# gem 'nokogiri'
# gem 'sqlite3-ruby', :require => 'sqlite3'
# gem 'aws-s3', :require => 'aws/s3'
# Bundle gems for the local environment. Make sure to
# put test-only gems in this group so their generators
# and rake tasks are available in development mode:
# group :development, :test do
# gem 'webrat'
# end
gem 'fcgi'
gem 'minitest'

Answer 1

It looks like you're using a really old version of Rails there.
Heroku recently changed all new applications to default to using Ruby 2.0.0 - I'd suggest putting
ruby '1.9.3'
in your Gemfile under the source line to lock your application to Ruby 1.9.3 as you may be experiencing issues with the latest version of Ruby and old Rails/gems etc.