Failed to install "gem install eventmachine". I need starling in my project, for starling i need to install eventmachine

I am getting the following error on my console

root@comp09:~# gem install eventmachine
Building native extensions.  This could take a while...
ERROR:  Error installing eventmachine:开发者_如何学编程
 ERROR: Failed to build gem native extension.

/usr/local/bin/ruby extconf.rb
checking for rb_trap_immediate in ruby.h,rubysig.h... yes
checking for rb_thread_blocking_region()... no
checking for inotify_init() in sys/inotify.h... yes
checking for writev() in sys/uio.h... yes
checking for rb_thread_check_ints()... no
checking for rb_time_new()... yes
checking for sys/event.h... no
checking for epoll_create() in sys/epoll.h... yes
creating Makefile

make
I. -I/usr/local/lib/ruby/1.8/x86_64-linux -I/usr/local/lib/ruby/1.8/x86_64-linux -I. -DBUILD_FOR_RUBY -DHAVE_RB_TRAP_IMMEDIATE -DHAVE_RBTRAP -DHAVE_INOTIFY_INIT -DHAVE_INOTIFY -DHAVE_WRITEV -DHAVE_WRITEV -DHAVE_RB_TIME_NEW -DOS_UNIX -DHAVE_EPOLL_CREATE -DHAVE_EPOLL -DWITH_SSL    -fPIC -O2 -g -Wall -Wno-parentheses -Wno-long-long     -o rubymain.o -c rubymain.cpp
make: I.: Command not found
make: [rubymain.o] Error 127 (ignored)
I. -I/usr/local/lib/ruby/1.8/x86_64-linux -I/usr/local/lib/ruby/1.8/x86_64-linux -I. -DBUILD_FOR_RUBY -DHAVE_RB_TRAP_IMMEDIATE -DHAVE_RBTRAP -DHAVE_INOTIFY_INIT -DHAVE_INOTIFY -DHAVE_WRITEV -DHAVE_WRITEV -DHAVE_RB_TIME_NEW -DOS_UNIX -DHAVE_EPOLL_CREATE -DHAVE_EPOLL -DWITH_SSL    -fPIC -O2 -g -Wall -Wno-parentheses -Wno-long-long     -o em.o -c em.cpp
make: I.: Command not found

For any help and suggestion it would be greatly appreciated.

I had a similar issue on Ubuntu 11.10 installing eventmachine.
The difference being (near the end of the logs)

make: g++: Command not found

instead of

make: I.: Command not found

This issue is related with C++ on GCC and resolved by installing build-essential

sudo apt-get install build-essential 

You may also be missing the ruby dev packages. Depending on what version of ruby you are using, this could be ruby-dev, ruby1.8-dev, ruby1.9-dev, or ruby1.9.1-dev. I had the same problem, and installed ruby1.9-dev and ruby1.9.1-dev and that solved my issue.

This is the site that led me to try this approach: http://ruby.about.com/od/faqs/qt/Extconf-Rb-1-In-Require-No-Such-File-To-Load-Mkmf-Loaderror.htm

I had the same issue, this is how resolved it [NOTE: I am using ubuntu, so at "g++" you have to use "gcc" if you are using any other OS]:

At first I cloned the repository to my local machine, and did some changes, have a look at the procedure below:

git clone git://github.com/eventmachine/eventmachine.git
cd eventmachine
gem install rake-compiler
rake-compiler cross-ruby VERSION=x.x.x-px 

At the place of x.x.x-px you have to use your ruby version. see the list of available version of ruby which are compatible with rake-compiler here

Then go and put this: CONFIG['CXX'] = "g++" in /eventmachine/ext/extconf.rb and /eventmachine/ext/fastfilereader/extconf.rb files, right below require 'mkmf' line. then do: rake gem and after that: rake gem:install

It worked for me, hope it works for you too.

I'm using Ubuntu 16.10 sudo apt-get install ruby-dev build-essential then sudo gem install eventmachine. That solved it for me.

from docs .

EventMachine may require the following dependencies, depending on your specific usage:

* OpenSSL
* libstd++ (some systems, such as debian, may require an explicit

install in order for the compiler to support this)

Try to install it , if you are using debian

sudo apt-get install libstdc++6

Remember to run rvm requirements and follow the instructions in Additional Dependencies.

For all users running openSUSE you'll need to execute this command :

zypper in -t pattern devel_C_C++ 

For simplicity we can say that this is the equivalent of this command under Ubuntu :

sudo apt-get install build-essential