Ошибка при развертывании приложения Rails в Ubuntu с «единорогом драгоценного камня» в Gemfile

Я развертываю приложение Rails 3.2.8 в Ubuntu. На сервере уже запущено приложение с Unicorn и Nginx. единорог -v возвращает единорог v4.4.0

Список драгоценных камней Adn rvm показывает: единорог (4.4.0)

Тем не менее, когда я вручную запускаю «gem install unicorn 4.4.0», происходит сбой со следующим. Есть идеи, почему?

Installing unicorn (4.4.0)
 ** [out :: mydomain.net] with native extensions
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] /home/eg/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
 ** [out :: mydomain.net] checking for SIZEOF_OFF_T in ruby.h... *** extconf.rb failed ***
 ** [out :: mydomain.net] Could not create Makefile due to some reason, probably lack of
 ** [out :: mydomain.net] necessary libraries and/or headers.  Check the mkmf.log file for more
 ** [out :: mydomain.net] details.  You may need configuration options.
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] Provided configuration options:
 ** [out :: mydomain.net] --with-opt-dir
 ** [out :: mydomain.net] --with-opt-include
 ** [out :: mydomain.net] --without-opt-include=${opt-dir}/include
 ** [out :: mydomain.net] --with-opt-lib
 ** [out :: mydomain.net] --without-opt-lib=${opt-dir}/lib
 ** [out :: mydomain.net] --with-make-prog
 ** [out :: mydomain.net] --without-make-prog
 ** [out :: mydomain.net] --srcdir=.
 ** [out :: mydomain.net] --curdir
 ** [out :: mydomain.net] --ruby=/home/eg/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
 ** [out :: mydomain.net] /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
 ** [out :: mydomain.net] You have to install development tools first.
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:491:in `block in try_compile'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:443:in `with_werror'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:491:in `try_compile'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:686:in `macro_defined?'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:822:in `block in have_macro'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:254:in `open'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:254:in `open'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] from /home/eg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:821:in `have_macro'
 ** [out :: mydomain.net] from extconf.rb:4:in `<main>'
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] Gem files will remain installed in /rails_apps/eg/production/shared/bundle/ruby/1.9.1/gems/unicorn-4.4.0 for inspection.
 ** [out :: mydomain.net] Results logged to /rails_apps/eg/production/shared/bundle/ruby/1.9.1/gems/unicorn-4.4.0/ext/unicorn_http/gem_make.out
 ** [out :: mydomain.net] 
 ** [out :: mydomain.net] An error occurred while installing unicorn (4.4.0), and Bundler cannot continue.
 ** [out :: mydomain.net] Make sure that `gem install unicorn -v '4.4.0'` succeeds before bundling.

Вот содержимое того, что я думаю, из соответствующего файла mkmf.log.

have_macro: checking for SIZEOF_SIZE_T in ruby.h... -------------------- yes

"gcc -I/home/evergreen/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/x86_64-linux -I/home/eg/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/backward -I/home/eg/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1 -I. -I/home/eg/.rvm/usr/include     -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration  -fPIC   -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <ruby.h>
4: /*top*/
5: #ifndef SIZEOF_SIZE_T
6: # error
7: >>>>>> SIZEOF_SIZE_T undefined <<<<<<
8: #endif
/* end */

--------------------

have_macro: checking for SIZEOF_LONG in ruby.h... -------------------- yes