ERRORE: impossibile creare l'estensione nativa gem su Yosemite

Question

Ho riscontrato problemi con l'installazione del CocoaPods su Yosemite. Ho installato l'installazione gem seguendo il comando.

sudo gem install cocoapods 

Questa è la risposta del comando menzionato.

Building native extensions. This could take a while... 
ERROR: Error installing cocoapods: 
    ERROR: Failed to build gem native extension. 

    "/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby" -rubygems /Library/Ruby/Gems/2.0.0/gems/rake-0.9.6/bin/rake RUBYARCHDIR=/Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.17.0/ext RUBYLIBDIR=/Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.17.0/ext 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb 
checking for -std=c99 option to compiler... *** 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=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError) 
You have to install development tools first. 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:549:in `block in try_compile' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:502:in `with_werror' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:549:in `try_compile' 
    from extconf.rb:24:in `block in <main>' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:895:in `block in checking_for' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:340:in `block (2 levels) in postpone' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:310:in `open' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:340:in `block in postpone' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:310:in `open' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:336:in `postpone' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:894:in `checking_for' 
    from extconf.rb:23:in `<main>' 
rake aborted! 
Command failed with status (1): [/System/Library/Frameworks/Ruby.framework/...] 
/Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.17.0/ext/xcodeproj/Rakefile:37:in `block in <top (required)>' 
Tasks: TOP => default => ext 
(See full trace by running task with --trace) 


Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.17.0 for inspection. 
Results logged to /Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.17.0/ext/xcodeproj/gem_make.out 

Qualcuno potrebbe aiutarmi per favore?

Answer 1

Finalmente ho scoperto che cos'è un problema.

Prima di tutto è necessario installare Xcode Command Tool.

xcode-select --install 

In secondo luogo è necessario controllare se Ruby on Rails è ben configurato.

Dopo che collegare utensile comando Xcode nelle preferenze di Xcode 6.

allora è possibile utilizzare il comando sudo gem install cocoapods.

Answer 2

Non sono sicuro dell'errore specifico, anche se molto probabilmente dovrai reinstallare Ruby dopo l'aggiornamento a Yosemite prima di installare i pod di cacao.

Sembra che dopo l'aggiornamento la configurazione Ruby sia interrotta.

Inoltre è possibile utilizzare Homebrew - per gestire le versioni e le installazioni di Ruby (in pratica non è solo per Ruby).