Ruby – How to install the libv8 ruby gem on a fresh Mountain Lion install

osx-mountain-lionrubyruby-on-rails-3v8

I've been racking my head on this one. I've followed suggestions in several related posts but to no avail.

I am starting from a fresh install of Mountain Lion, installed the Command Line Tools, and have Ruby 1.8.7 successfully installed based on a few other posts I've found for installing gcc-4.2 via Homebrew and adding a symlink to /usr/bin/gcc-4.2.

Now, however, I'm unable to successfully install libv8. The error below is as far as I've gotten off of the existing suggestions.

Any additional input?

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/Eric/.rbenv/versions/1.8.7-p352/bin/ruby extconf.rb 
creating Makefile
Unable to find a compiler officially supported by v8.
It is recommended to use GCC v4.4 or higher
Traceback (most recent call last):
  File "build/gyp/gyp", line 18, in <module>
    sys.exit(gyp.main(sys.argv[1:]))
  File "build/gyp/pylib/gyp/__init__.py", line 480, in main
    generator.GenerateOutput(flat_list, targets, data, params)
  File "build/gyp/pylib/gyp/generator/make.py", line 2085, in GenerateOutput
    part_of_all=qualified_target in needed_targets)
  File "build/gyp/pylib/gyp/generator/make.py", line 756, in Write
    self.xcode_settings, self.Absolutify, self.Pchify))
  File "build/gyp/pylib/gyp/generator/make.py", line 1132, in WriteSources
    cflags = self.xcode_settings.GetCflags(configname)
  File "build/gyp/pylib/gyp/xcode_emulation.py", line 258, in GetCflags
    sdk_root = self._SdkPath()
  File "build/gyp/pylib/gyp/xcode_emulation.py", line 247, in _SdkPath
    return os.path.join(self._GetSdkBaseDir(), '%s.sdk' % sdk_root)
  File "build/gyp/pylib/gyp/xcode_emulation.py", line 233, in _GetSdkBaseDir
    raise Exception('Error %d running xcode-select' % job.returncode)
Exception: Error 2 running xcode-select
make: *** [out/Makefile.x64] Error 1
Using compiler: g++
GYP_GENERATORS=make \
    build/gyp/gyp --generator-output="out" build/all.gyp \
                  -Ibuild/standalone.gypi --depth=. \
                  -Dv8_target_arch=x64 \
                  -S.x64 -Dhost_arch=x64
xcode-select: Error: No Xcode is selected. Use xcode-select -switch <path-to-xcode>, or see the xcode-select manpage (man xcode-select) for further information.



Gem files will remain installed in /Users/Eric/Development/par8o/vendor/bundle/ruby/1.8/gems/libv8-3.11.8.3 for inspection.
Results logged to /Users/Eric/Development/par8o/vendor/bundle/ruby/1.8/gems/libv8-3.11.8.3/ext/libv8/gem_make.out
An error occured while installing libv8 (3.11.8.3), and Bundler cannot continue.
Make sure that `gem install libv8 -v '3.11.8.3'` succeeds before bundling.

Best Answer

The deal is with ruby 1.8.7. Probably you need this gem to run therubyracer. And to make this work you need install therubyracer gem as follows:

RUBYOPT=-rrubygems gem install therubyracer

This will install both therubyracer and libv8 gems.

source: http://coderwall.com/p/y1djxq

Related Topic