gemspec to create ncurses 1.2.4 gem

ncurses124.gemspec

require "rubygems"

PLUGIN   = "ncurses"
NAME     = "ncurses"
VERSION  = "1.2.4"
AUTHOR   = "Tobias Peters"
EMAIL    = "t-peters@users.berlios.de"
HOMEPAGE = "http://ncurses-ruby.berlios.de/"
SUMMARY  = "This wrapper provides access to the functions, macros, global variables and constants of the ncurses library.  These are mapped to a Ruby Module named \"Ncurses\":  Functions and external variables are implemented as singleton functions of the Module Ncurses."

spec = Gem::Specification.new do |s|
  s.name          = NAME
  s.email         = EMAIL
  s.author        = AUTHOR
  s.version       = VERSION
  s.summary       = SUMMARY
  s.platform      = Gem::Platform::RUBY
  s.has_rdoc      = false
  s.homepage      = HOMEPAGE
  s.description   = SUMMARY
  s.autorequire   = PLUGIN
  s.require_paths = ["lib"]
  s.files = Dir.glob("[A-Z]*") + Dir.glob("*.{c,h,rb}") + Dir.glob("{examples,lib}/**/*")
  s.extensions    = "extconf.rb"
end
# adapted by rkumar for ruby 1.9.2 ncurses (rbcurse widget library)
# save this file as ncurses.gemspec in same folder
# sudo gem build ncurses.gemspec
# sudo gem install --local ncurses-1.2.4.gem

In order to successfully compile on OS X Snow Leopard, please replace existing CFLAGS line with this (in extconf.rb):

$CFLAGS += ” -g -DNCURSES_OPAQUE=0″

Then run:
ruby ./extconf.rb
make
make install
gem build ncurses124.gemspec
gem install --local ncurses-1.2.4.gem

go to examples folder and run:

ruby examples.rb
ruby hello_ncurses.rb

Thanks to Ralf Papenkordt for this help.