therubyracer install error

As you can see below, libv8 installs fine, but therubyracer doesn't. I'm using Mac 10.7.4.

~/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1> gem install libv8
Building native extensions.  This could take a while...
Successfully installed libv8-3.11.8.3
1 gem installed
Installing ri documentation for libv8-3.11.8.3...
Installing RDoc documentation for libv8-3.11.8.3...

~/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1> gem install therubyracer
Building native extensions.  This could take a while...
ERROR:  Error installing therubyracer:
    ERROR: Failed to build gem native extension.

        /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
checking for main() in -lobjc... *** 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/rdp/.rvm/rubies/ruby-1.9.3-p125/bin/ruby
    --with-objclib
    --without-objclib
/Users/rdp/.rvm/rubies/ruby-1.9.3-p125/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/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:461:in `try_link0'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:476:in `try_link'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:619:in `try_func'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:845:in `block in have_library'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
    from /Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:840:in `have_library'
    from extconf.rb:10:in `<main>'


Gem files will remain installed in /Users/rdp/.rvm/gems/ruby-1.9.3-p125/gems/therubyracer-0.10.1 for inspection.
Results logged to /Users/rdp/.rvm/gems/ruby-1.9.3-p125/gems/therubyracer-0.10.1/ext/v8/gem_make.out

Here's the mkmf.log, which is located in ~/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/gems/1.9/gems/therubyracer-0.10.1/ext/v8>.

File Edit Options Buffers Tools Help

"/usr/bin/gcc-4.2 -o conftest -I/Users/rdp/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/x86_64-darwin11.3.0 -I/Users/rdp/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/rub\
y/backward -I/Users/rdp/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1 -I. -I/Users/rdp/.rvm/usr/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE    -O3 -ggdb -Wextra -Wno-unused-\
parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wshorten-64-to-32 -Wimplicit-functio\
n-declaration  -fno-common -pipe conftest.c  -L. -L/Users/rdp/.rvm/rubies/ruby-1.9.3-p125/lib -L/Users/rdp/.rvm/usr/lib -L.      -lruby.1.9.1  -lpthread -ldl -lobjc "
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main() {return 0;}
/* end */

You can use the Libv8 from the brew instead of the one from gem. You can do that by following commands:

$ gem uninstall libv8
$ brew install v8
$ gem install therubyracer

For an older project I had to used the 0.10.1 version of rubyracer on mavericks (bootstrap depends on it)

So I had to use an older version of gcc

edit your .zshrc or .bashrc

export CC=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2
export CXX=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/g++-4.2
export CPP=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/cpp-4.2

be sure that you have uninstalled all older versions of libv8
```
gem uninstall libv8
```
install your version of therubyracer
```
gem install therubyracer -v=0.10.1
```

For Linux:

The code below is of course correct

$ gem uninstall libv8

$ gem install therubyracer

But sometimes it does't help because you haven't program make. AT FIRST you need install make. To do this, run:

sudo apt-get install build-essential

And only after that:

gem install therubyracer

On Mavericks, you just need to update to therubyracer 0.12.0

The solution that worked for me was putting these steps together on 10.7.4

export CC=gcc-4.2

sudo ln /usr/bin/gcc /usr/bin/gcc-4.2

gem uninstall libv8
gem install therubyracer

Mac 10.10.5, Ruby 2.1.0 this worked for me:

gem uninstall libv8
gem uninstall therubyracer

brew upgrade gcc
brew install v8

bundle config --local build.libv8 --with-cxx=/usr/local/bin/gcc-6
gem install libv8 -v '3.16.14.17' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

bundle install # worked !

senration

I've had the exact same issue just till now.

This link saved me.

to sum up, you need to do this:

$ gem uninstall libv8
$ gem install therubyracer

before i fixed this issue, i had v8 installed in my mac. i don't know if this helped, since it seems have sth to do with js interpreter, I thought it might help.

On Mountain Lion 10.8, it doesn't come preinstalled with a C compiler. You'll need to download and install the 'command line tools' package from Apple themselves, and then run which gcc to confirm it is installed. Everything should run fine from there on in.

On OS X 10.7 I actually found that the "Command Line Tools" package wasn't enough, I had to install the full-blown XCode package, then gem install worked.

I had this same problem when I upgraded from OSX Mountain Lion to OSX Mavericks.

Upgrading from ruby-1.8.7-p354 to ruby-1.8.7-375 did the trick for me. If you are on ruby-1.93-p125, you may want to try upgrading to 1.9.3-rc1 (which is above p484 already)

libv8 (3.16.14.3-x86_64-darwin-13) and the therubyracer (0.12.0) gems installed without problem.

assuming you use rbenv:

rbenv install 1.9.3-rc1
rbenv rehash
rbenv shell 1.9.3-rc1
bundle install

According to https://github.com/cowboyd/therubyracer/issues/420#issuecomment-253592865

gem uninstall therubyracer
gem uninstall libv8
brew uninstall v8
brew install v8
gem install libv8
gem install therubyracer

It helped me. Parameters: ruby 2.3.3, rails 4.2.9

@Haegin's answer in https://github.com/cowboyd/libv8/issues/205

brew uninstall v8
brew install v8-315
gem uninstall -a libv8
gem uninstall -a therubyracer
gem install libv8 -v '3.16.14.17' -- --with-system-v8
gem install therubyracer -v '0.12.2' -- --with-v8-dir=$(brew --prefix v8-315)

来源：https://stackoverflow.com/questions/11598655/therubyracer-install-error

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