My machine using OSX El Capitan. I already follow the instructions one by one. It's working fine until I need to install rails, something unwanted happened. BTW I already installed Xcode command line tools but still not fix even I restart the terminal and machine. I got this error message.
gem install rails -v 4.2.4
Error message
Last login: Sat Nov 7 15:07:53 on ttys000
Mohammads-MacBook-Air% gem install rails -v 4.2.4
Ignoring curb-0.8.8 because its extensions are not built. Try: gem pristine curb --version 0.8.8
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/Users/ZERO/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20151107-786-tg78i0.rb extconf.rb
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Ignoring curb-0.8.8 because its extensions are not built. Try: gem pristine curb --version 0.8.8
-----
The file "/usr/include/iconv.h" is missing in your build environment,
which means you haven't installed Xcode Command Line Tools properly.
To install Command Line Tools, try running `xcode-select --install` on
terminal and follow the instructions. If it fails, open Xcode.app,
select from the menu "Xcode" - "Open Developer Tool" - "More Developer
Tools" to open the developer site, download the installer for your OS
version and run it.
-----
*** 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=/Users/ZERO/.rvm/rubies/ruby-2.2.1/bin/$(RUBY_BASE_NAME)
--help
--clean
--use-system-libraries
--enable-static
--disable-static
--with-zlib-dir
--without-zlib-dir
--with-zlib-include
--without-zlib-include=${zlib-dir}/include
--with-zlib-lib
--without-zlib-lib=${zlib-dir}/lib
--enable-cross-build
--disable-cross-build
extconf failed, exit code 1
Gem files will remain installed in /Users/ZERO/.rvm/gems/ruby-2.2.1/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /Users/ZERO/.rvm/gems/ruby-2.2.1/extensions/x86_64-darwin-14/2.2.0-static/nokogiri-1.6.6.2/gem_make.out
Mohammads-MacBook-Air%
It's working now. Using rvm to handel it.
rvm install ruby-2.1.1
rvm 2.1.1
gem install rails -v 4.1.0