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Estoy intentando instalar la gema starling en mi máquina Windows. Pero, cada vez que intento instalarlo me sale este error:Instalación starling en Windows
Building native extensions. This could take a while...
ERROR: Error installing starling:
ERROR: Failed to build gem native extension.
c:/ruby/bin/ruby.exe extconf.rb install starling -- --srcdir= c:\ruby-1.8.7-p72
checking for windows.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
--srcdir=.
--curdir
--ruby=c:/ruby/bin/ruby
Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/eventmachine-0
.12.2 for inspection.
Results logged to c:/ruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.2/ext/gem_mak
e.out
¿Qué necesito para instalar para proporcionar la cabecera windows.h?