Ruby on Rails

Hi all,

for first sorry for my english.

Recently I've updated my Mac to El Capitan and re-installed (with
Homebrew) ImageMagick 6.9.2-7

Unfortunately bundle install seems doesn't work becaus RMagick fail to
build.

Here the stack trace:

[CODE]
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/bin/ruby -r
./siteconf20151204-39308-uw4m6y.rb extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for /usr/local/opt/gcc46/bin/gcc-4.6... yes
checking for Magick-config... yes
checking for ImageMagick version >= 6.4.9... yes
checking for HDRI disabled version of ImageMagick... yes
checking for stdint.h... *** 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
  --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/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:381:in
`try_do': The compiler failed to generate an executable file.
(RuntimeError)
You have to install development tools first.
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:506:in
`try_cpp'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:931:in
`block in have_header'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:790:in
`block in checking_for'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:284:in
`block (2 levels) in postpone'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:254:in
`open'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:284:in
`block in postpone'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:254:in
`open'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:280:in
`postpone'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:789:in
`checking_for'
  from
/Users/yuriredaelli/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:930:in
`have_header'
  from extconf.rb:194:in `<main>'

extconf failed, exit code 1

[/CODE]

I've tried several different solutions founded on Internet but nothing
seems to fix this error.

With the operations below I receive always the errore above:

1)
C_INCLUDE_PATH=/usr/local/Cellar/imagemagick/6.9.2-7/include/ImageMagick-6/
gem install rmagick -v '2.13.2'

2) gem install rmagick --version=2.13.2 --platform=ruby --
--with-opt-lib="h:/ImageMagick-6.9.2-7/lib"
--with-opt-include="h:/ImageMagick-6.9.2-7/include"

3) $ cd /usr/local/Cellar/imagemagick/6.9.2-7/lib
$ ln -s libMagick++-Q16.6.dylib   libMagick++.dylib
$ ln -s libMagickCore-Q16.2.dylib libMagickCore.dylib
$ ln -s libMagickWand-Q16.2.dylib libMagickWand.dylib

The error still the same:
"The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first."

I've also updated xcoce to 7.1.1

I'm using ruby-1.9.3-p327 with RVM

Thanks in advance.

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