gem install therubyracer -v 0.11.4 fails on OS X 10.10

Question

Following the steps here "gem install therubyracer -v '0.10.2'" on osx mavericks not installing, I was able to get therubyracer -v 0.10.2 and 0.12.0 to ins

Answer 1

This is exactly the issue I was having, and I solved it using homebrew-versions.

Problem

I had trouble installing the gem libv8. To solve that problem, I installed v8 on my system via brew, and then used the option --with-system-v8.

$ brew install v8
$ gem install libv8 -v '3.11.8.13' -- --with-system-v8
$ gem install therubyracer -v '0.11.4'

The gem libv8 installed without a problem, however the last line resulted in the error from the original question. I then tried,

$ gem install therubyracer -v '0.11.4' -- --with-system-v8 --with-v8-dir=/usr/local/Cellar/v8/3.30.33.16

pointing it at the v8 provided by brew. In that case, the error changed, and now told me that I had not provided a version of v8 compatible with 3.11.8.13.

For those googling the error message:

Building native extensions with: '--with-v8-dir=/usr/local/Cellar/v8/3.30.33.16/'
This could take a while...
ERROR:  Error installing therubyracer:
    ERROR: Failed to build gem native extension.

    /Users/zeigfreid/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb --with-v8-dir=/usr/local/Cellar/v8/3.30.33.16/
checking for main() in -lpthread... yes
checking for main() in -lobjc... yes
checking for v8.h... no
*** 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/zeigfreid/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
    --with-pthreadlib
    --without-pthreadlib
    --with-objclib
    --without-objclib
    --enable-debug
    --disable-debug
    --with-v8-dir
    --with-v8-include
    --without-v8-include=${v8-dir}/include
    --with-v8-lib
    --without-v8-lib=${v8-dir}/lib
/Users/zeigfreid/.rvm/gems/ruby-1.9.3-p194@va_rails_3.2.11/gems/libv8-3.11.8.13/ext/libv8/location.rb:50:in `configure': You have chosen to use the version of V8 found on your system (Libv8::Location::System::NotFoundError)
and *not* the one that is bundle with the libv8 rubygem. However,
it could not be located. please make sure you have a version of
v8 that is compatible with 3.11.8.13 installed. You may
need to special --with-v8-dir options if it is in a non-standard
location

thanks,
The Mgmt

    from /Users/zeigfreid/.rvm/gems/ruby-1.9.3-p194@va_rails_3.2.11/gems/libv8-3.11.8.13/lib/libv8.rb:7:in `configure_makefile'
    from extconf.rb:32:in `
'

extconf failed, exit code 1

Gem files will remain installed in /Users/zeigfreid/.rvm/gems/ruby-1.9.3-p194@va_rails_3.2.11/gems/therubyracer-0.11.4 for inspection.
Results logged to /Users/zeigfreid/.rvm/gems/ruby-1.9.3-p194@va_rails_3.2.11/extensions/x86_64-darwin-13/1.9.1/therubyracer-0.11.4/gem_make.out

Solution

I decided to try installing an earlier version of v8. Using brew again,

$ brew search v8
homebrew/versions/v8-315   v8
$ brew install v8-315
$ brew info v8-315
$ gem install therubyracer -v '0.11.4' -- --with-system-v8 --with-v8-dir=/usr/local/Cellar/v8-315/3.15.11

This worked. The version of v8 I ended up installing was ~3.15, but this was compatible with 3.11.8

The real solution here is to update everything to the latest version, and I do not advocate using old and out of date gems. Keep your system clean and up-to-date, even if it hurts!