Gem therubyracer non si installa anche se libv8 è installato

Question

ho installato libv8 gioiello finestre utilizzando questo comando:

gem install libv8 -- --with-system-v8 

Poi, quando provo ad installare therubyracer mi dà messaggio di errore lungo:

Installing therubyracer 0.12.2 with native extensions 

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. 

current directory: D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/therubyracer- 0.12.2/ext/v8 
D:/Ruby21-x64/bin/ruby.exe -r ./siteconf20160105-4924-101vdyd.rb extconf.rb 
checking for main() in -lpthread... 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 
--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=D:/Ruby21-x64/bin/ruby 
--with-pthreadlib 
--without-pthreadlib 
--enable-debug 
--disable-debug 
--with-v8-dir 
--without-v8-dir 
--with-v8-include 
--without-v8-include=${v8-dir}/include 
--with-v8-lib 
--without-v8-lib=${v8-dir}/lib 
D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.13/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 3.16.14.13 installed. You may 
need to special --with-v8-dir options if it is in a non-standard 
location 

thanks, 
The Mgmt 

Quello che ho capito è che therubyracer vuole trovare v8. Ho installato Node.js che già lo ha. È persino possibile usarlo? O ci sono altre soluzioni per il terubyracer?

Answer 1

Questo bug appare in OS X El Capitan. Basta usare v8@3.15 per therubyracer.

brew install v8@3.15 
bundle config --local build.libv8 --with-system-v8 
bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/v8@3.15 
bundle install 

Check detail of this issue