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Asked: 2026-05-16T03:24:35+00:00

I am experiencing a strange problem with Ruby and Environment variables. I am currently

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I am experiencing a strange problem with Ruby and Environment variables.

I am currently on a x64 machine running Windows Server 2008 R2

If I do the following in ruby:
puts ENV['PROCESSOR_ARCHITECTURE']

I expect to see AMD64, however, Ruby is displaying x86

If I do: echo %PROCESSOR_ARCHITECTURE%, in the command prompt, I am greeted with AMD64

My Ruby version is:
ruby 1.8.6 (2010-02-04 patchlevel 398) [i386-mingw32]

As far as I am aware, ENV['PROCESSOR_ARCHITECTURE'] should just read my environment variable…

Any ideas?

Cheers,
Gareth

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1 Answer

  1. Editorial Team

    It does read your environment variable, but since your ruby executable is compiled for 32-bit, it runs in a 32-bit environment where the value of PROCESSOR_ARCHITECTURE is indeed “x86”.

    If you put system "echo %PROCESSOR_ARCHITECTURE%" in your ruby script, you will see that it will also output “x86”.

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