# Help to create a Ruby extension in C **URL:** \ **Category:** Ruby\ **Created:** [April 16, 2009, 6:49am UTC](https://www.ruby-forum.com/t/help-to-create-a-ruby-extension-in-c/165662 "2009-04-16T06:49:44Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [April 16, 2009, 6:49am UTC](https://www.ruby-forum.com/t/help-to-create-a-ruby-extension-in-c/165662/1 "2009-04-16T06:49:44Z")
hi… i just followed the peter cooper’s tutorial on How to create a Ruby extension in C in under 5 minutes in the [rubyinside.com](http://rubyinside.com). folowng the tutorial i create extconf.rb and MyTest.c . i installed the cygwin. in that command prompt i given command =\>$ ruby extconf.rb after giving the command it created the makefile in to my folder. after that i given command =\> $ make it creates MyTest.o file and mytest(this file type is Apache Loadable Module) and no errors… it has not created the .so file into my folder… In irb when i give require ‘mytest’ the irb doesnot display anything… what is the problem…and what i m doing wrong… Kindly Help Me out… ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [April 16, 2009, 9:12am UTC](https://www.ruby-forum.com/t/help-to-create-a-ruby-extension-in-c/165662/2 "2009-04-16T09:12:05Z")
Newb N. wrote: > it creates MyTest.o file and mytest(this file type is Apache Loadable > Module) Possibly would be a DLL for Windows? > In irb when i give require ‘mytest’ > > the irb doesnot display anything… Can you paste _exactly_ what you see? If it returns “true” then the extension was loaded correctly. Or did it crash IRB, i.e. you didn’t even get a prompt back? ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [April 16, 2009, 9:22am UTC](https://www.ruby-forum.com/t/help-to-create-a-ruby-extension-in-c/165662/3 "2009-04-16T09:22:49Z")
Brian C. wrote: > Newb N. wrote: > > > it creates MyTest.o file and mytest(this file type is Apache Loadable > > Module) > > Possibly would be a DLL for Windows? > > > In irb when i give require ‘mytest’ > > > > the irb doesnot display anything… > > Can you paste _exactly_ what you see? If it returns “true” then the > extension was loaded correctly. Or did it crash IRB, i.e. you didn’t > even get a prompt back? thank you…it actaully created .so file… but when i give require command it gives me true… but want to know wat it does when i give require ‘mytest’ command… and when i give command like require ‘MyTest’ command it shows me error… what is the reason Thanks ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [April 16, 2009, 10:37am UTC](https://www.ruby-forum.com/t/help-to-create-a-ruby-extension-in-c/165662/4 "2009-04-16T10:37:06Z")
On Apr 16, 2009, at 00:22 , Newb N. wrote: > thank you…it actaully created .so file… > but when i give require command it gives me true… > but want to know wat it does when i give require ‘mytest’ command… > and when i give command like require ‘MyTest’ command it shows me > error… > what is the reason the file is named “mytest.so” and you’re probably on a case sensitive file system. I’m guessing you don’t have a file named MyTest.so (or .rb). look at your doco for Kernel#require to see what it does. You can use `ri` for that or look it up on rubydoc or somesuch.