From: Mario Ruiz <tcblues@...>
Date: 2011-09-15T20:06:31+09:00
Subject: problem installing gems

I cannot install gem files on windows 7 running ruby 1.8.7
I tried to install watir-webdriver -v0.3.3 or selenium-webdriver -v0.2.2
but I got this message:

Building native extensions.  This could take a while...
ERROR:  Error installing watir-webdriver:
        ERROR: Failed to build gem native extension.

        c:/ruby/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... no
checking for ruby_thread_has_gvl_p()... no
checking for ruby_native_thread_p()... no
checking for rb_thread_call_with_gvl()... no
creating extconf.h
creating Makefile

nmake
'nmake' is not recognized as an internal or external command,
operable program or batch file.


Gem files will remain installed in
c:/ruby/lib/ruby/gems/1.8/gems/ffi-1.0.9 for
inspection.
Results logged to
c:/ruby/lib/ruby/gems/1.8/gems/ffi-1.0.9/ext/ffi_c/gem_make.out


any idea how to solve this?

Thanks in advance

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