Installing libv8 gem on OS X 10.9+
I'm trying to install libv8 3.16.14.3 but getting an error on OSX Mavericks using latest stable rvm and ruby-1.9.3-p125.
This is the output of running the command 'gem install libv8':
~/src(branch:master) » gem install libv8
Fetching: libv8-3.16.14.3.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing therubyracer:
ERROR: Failed to build gem native extension.
/Users/me/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
creating Makefile
Compiling v8 for x64
Using python 2.7.5
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Unable to find a compiler officially supported by v8.
It is recommended to use GCC v4.4 or higher
Using compiler: g++
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Unable to find a compiler officially supported by v8.
It is recommended to use GCC v4.4 or higher
libtool: unrecognized option `-static'
libtool: Try `libtool --help' for more information.
make[1]: *** [/Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/libpreparser_lib.a] Error 1
make: *** [x64.release] Error 2
/Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/ext/libv8/location.rb:36:in `block in verify_installation!': libv8 did not install properly, expected binary v8 archive '/Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/tools/gyp/libv8_base.a'to exist, but it was not found (Libv8::Location::Vendor::ArchiveNotFound)
from /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/ext/libv8/location.rb:35:in `each'
from /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/ext/libv8/location.rb:35:in `verify_installation!'
from /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/ext/libv8/location.rb:26:in `install!'
from extconf.rb:7:in `<main>'
GYP_GENERATORS=make \
build/gyp/gyp --generator-output="out" build/all.gyp \
-Ibuild/standalone.gypi --depth=. \
-Dv8_target_arch=x64 \
-S.x64 -Dv8_enable_backtrace=1 -Dv8_can_use_vfp2_instructions=true -Darm_fpu=vfpv2 -Dv8_can_use_vfp3_instructions=true -Darm_fpu=vfpv3
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/allocation.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/atomicops_internals_x86_gcc.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/bignum.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/bignum-dtoa.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/cached-powers.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/conversions.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/diy-fp.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/dtoa.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/fast-dtoa.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/fixed-dtoa.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/once.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparse-data.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparser.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparser-api.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/scanner.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/strtod.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/token.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/unicode.o
CXX(target) /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/obj.target/preparser_lib/src/utils.o
LIBTOOL-STATIC /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/vendor/v8/out/x64.release/libpreparser_lib.a
Gem files will remain installed in /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3 for inspection.
Results logged to /Users/me/.rvm/gems/ruby-1.9.3-p125@proj-rails3-ruby19/gems/libv8-3.16.14.3/ext/libv8/gem_make.out
This is due to the fact that OS X 10.9+ is using version 4.8 of GCC. This is not supported officially in older versions of libv8 as mentioned in the pull request (https://github.com/cowboyd/libv8/pull/95). Please try bumping up the version of libv8 in your Gemfile (or) a bundle update should suffice. Hope this helps.
From the libv8 README
Bring your own V8
Because libv8 is the interface for the V8 engine used by therubyracer, you may need to use libv8, even if you have V8 installed already. If you wish to use your own V8 installation, rather than have it built for you, use the --with-system-v8 option.
Using RubyGems:
gem install libv8 [-v YOUR_VERSION] -- --with-system-v8
Using Bundler (in your Gemfile):
bundle config build.libv8 --with-system-v8
Please note that if you intend to run your own V8, you must install both V8 and its headers (found in libv8-dev for Debian distros).
Bring your own compiler
You can specify a compiler of your choice by either setting the CXX environment variable before compilation, or by adding the --with-cxx= option to the bundle configuration:
bundle config build.libv8 --with-cxx=clang++
Edit:
If this issue is brought on by therubyracer, try the following as suggested by rider_on_rails here:
gem uninstall libv8
gem install therubyracer -v YOUR_RUBY_RACER_VERSION
gem install libv8 -v YOUR_VERSION -- --with-system-v8
You can actually install that version on Mavericks:
gem install libv8 -v 3.11.8.17 -- --with-system-v8
I can confirm this works with rbenv and ruby 1.9.3p448
El Capitan Solution for me:
$ brew install v8
$ gem install libv8 -v REQUIRED_LIBV8_VERSION -- --with-system-v8
Where REQUIRED_LIBV8_VERSION for me was 3.16.14.7, but you need to check which is the one you need in your bundle (this was the one for rails 4.2.5)
You may also need to run the commands above as the superuser (if your gems and system libraries are global)
You can configure bundler instead of having to know each version. @3.15 could be replaced with other versions.
$ brew install [email protected]
$ bundle config build.libv8 --with-system-v8
$ bundle config build.therubyracer --with-v8-dir=$(brew --prefix [email protected])
$ bundle install