问题
I am not able to install eventmachine
Ok I know this has been asked quite a lot, but no solutions I found has helped me so far.So I posted here as a last resort.
I use windows 8 x64 using ruby 2.0.0p195 (x64) (installed throught Ruby Installer for Windows with the apropriate Devkit)
So the Error is
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension
C:/Ruby200-x64/bin/ruby.exe extconf.rb
checking for main() in -lssl... no
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... yes
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... no
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for windows.h... yes
checking for winsock.h... yes
checking for main() in -lkernel32... yes
checking for main() in -lrpcrt4... yes
checking for main() in -lgdi32... yes
creating Makefile
make
generating rubyeventmachine-x64-mingw32.def
compiling binder.cpp
In file included from c:\users\btdy\downloads\devkit\mingw\bin\../lib/gcc/x86_64
-w64-mingw32/4.7.2/../../../../x86_64-w64-mingw32/include/process.h:12:0,
from c:/Ruby200-x64/include/ruby-2.0.0/ruby/win32.h:60,
from c:/Ruby200-x64/include/ruby-2.0.0/ruby/defines.h:153,
from c:/Ruby200-x64/include/ruby-2.0.0/ruby/ruby.h:70,
from c:/Ruby200-x64/include/ruby-2.0.0/ruby.h:33,
from em.h:24,
from project.h:150,
from binder.cpp:20:
c:\users\btdy\downloads\devkit\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/../
../../../x86_64-w64-mingw32/include/sys/types.h:68:16: error: conflicting declar
ation 'typedef _pid_t pid_t'
In file included from binder.cpp:20:0:
project.h:97:13: error: 'pid_t' has a previous declaration as 'typedef int pid_t
'
In file included from project.h:151:0,
from binder.cpp:20:
ed.h: In member function 'void EventableDescriptor::SetSocketInvalid()':
ed.h:43:40: warning: overflow in implicit constant conversion [-Woverflow]
make: *** [binder.o] Error 1
Things I have tried putting gem "eventmachine", "~> 1.0.3" or gem "eventmachine", "~> 1.0.0.beta.4.1" in my gemfile and removed/modify eventmachine from gemfile.lock
making a new testapp and instaling Eventmachine there (fail)
Things I suspect I tracked down dependencies for eventmachine(can be found on Rubygems) and I see that I cannot install bluecloth neither (shows even bigger log error) and neither can I install tidy-ext (bluecloth depencency) so I think it might have some relevance , also cannot install thin
For any info just ask
Thank you all in advance!!
回答1:
I could install it, doing this steps:
1) tried a normal install:
gem install eventmachine
it fetched the version 1.0.3 of the gem, but failed in the make, because of a variable declaration conflit
2) edited the file:
c:\Ruby200-x64\lib\ruby\gems\2.0.0\gems\eventmachine-1.0.3\ext\project.h
and commented the line 97
//typedef int pid_t;
for a more robust correction, checkout the solution here https://github.com/eventmachine/eventmachine/pull/450/files
3) then, i've opened command prompt, and went to the gem folder
c:\Ruby200-x64\lib\ruby\gems\2.0.0\gems\eventmachine-1.0.3
and run:
gem build eventmachine.gemspec
You need git installed with the git.exe location in the PATH for this to work (such as C:\Users\YourUsername\AppData\Local\GitHub\PORTAB~1\bin).
4) it generated a eventmachine.gem file on the folder... So I've copied a file to a c:\tmp folder, and went to that folder and from there, I've typed:
gem install eventmachine-1.0.3.gem --local
And it installed successfully!
回答2:
This worked for me:
brew link openssl --force
回答3:
I got an error as below
C:\Ruby200-x64\lib\ruby\gems\2.0.0\gems\eventmachine-1.0.3>gem build eventmachine.gemspec Invalid gemspec in [eventmachine.gemspec]: No such file or directory - git ls-files
ERROR: Error loading gemspec. Aborting.
However, I kept the project.h opened in textpad and tried to do gem install eventmachine. At one point, textpad will ask a confirmation to reload project.h as the new file is fetched from gem install command.. just give reload and comment the line //typedef int pid_t;.. Then the compilation went through..
basically, it takes a while to start the compilation after fetching the gem project files. Just use that time to comment htis line.. It worked for me.. may not work for everyone.
Cheers!
回答4:
Try
gem install eventmachine -- --with-cppflags=-I/usr/local/opt/openssl/include
回答5:
I had the same problem and successfully able to run it by adding below at the beginning of the Gemfile:
gem 'eventmachine', :git => 'git://github.com/eventmachine/eventmachine.git', :branch => 'master'
Before that I uninstalled eventmachine.
回答6:
I had the same problem in linux.
I solved it by upgrading ruby to ruby-2.2.1.
回答7:
I faced similar issues today for eventmachine gem (for both version 1.0.3 & 1.0.4) while upgrading to Ruby 2.2.0. And I fixed it by installing latest "developer tools" for MAC OSX 10.10.1 Yosemite and XCode 6.1.1
Here is my detailed blog post for resolving this issue with eventmachine gem installation - https://blog.kiprosh.com/upgrading-to-ruby-2-2-0-issues-installing-gem-eventmachine/
回答8:
The above answer on how to compile did not work for me, as I would get the "cannot load such file" message. I resolved this problem by running the gem build eventmachine.gemspec from a git checkout of the eventmachine repo.
https://github.com/eventmachine/eventmachine/tree/v1.0.3
You should be able to see that the size of the .gem file is much greater as it actually includes the proper code.
回答9:
You can try this answer here: Rails - cannot run app: Unable to load the EventMachine C extension;
The Accepted answer to this question works. But you'll have other problems as shown in the comments below.
Follow the solution by suda in the link, you'll be fine.
(Actually, it's basically compiling and installing gem from the master github code repo. I was surprised they haven't pushed the issue fix into master yet, since they're aware of it.)
来源：https://stackoverflow.com/questions/17361958/eventmachine-gem-install-fail