Can't install therubyracer-heroku in Ubuntu

Question

I can't install therubyracer-heroku in Ubuntu 12.04. I have seen this error in one or two other places on the internet, but no solution. The command I run is:

sudo gem install therubyracer-heroku -v '0.8.1.pre3'

The output is long, these are the last few lines (that contain the errors):

src/bootstrapper.cc: In static member function 'static bool v8::internal::Genesis::CompileScriptCached(v8::internal::Vector<const char>, v8::internal::Handle<v8::internal::String>, v8::internal::SourceCodeCache*, v8::Extension*, v8::internal::Handle<v8::internal::Context>, bool)':
src/bootstrapper.cc:1002:18: error: variable 'result' set but not used [-Werror=unused-but-set-variable]
src/bootstrapper.cc: In member function 'bool v8::internal::Genesis::InstallNatives()':
src/bootstrapper.cc:1227:24: error: variable 'name' set but not used [-Werror=unused-but-set-variable]
cc1plus: all warnings being treated as errors
scons: *** [obj/release/bootstrapper.o] Error 1
scons: building terminated because of errors.
make: *** [build/v8/libv8.a] Error 2
*** 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=/usr/bin/ruby1.8
extconf.rb:9: Error compiling V8 (RuntimeError)

Please help! Thanks

Answer 1

Nick,

therubyracer-heroku and therubyracer versions 0.8.1 are ancient. Please try using the normal version of therubyracer at it most recent release, currently version 0.11.3

gem install therubyracer

or, if you feel you must stick to a particular version

gem install therubyracer -v 0.11.3