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So in my case, I'm upgrading a Ruby install from a low patch level to a higher one. I wanted know exactly what flags, if any, were used in the previous ./configure step of the installation process.

Is there a way to determine this unilaterally? At the very least, is there a way to determine this for Ruby?

Thanks,
-a

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Probably do not have the "old" build directory anymore do you? You could peek in the config.cache file or w/e it's called. But I am guessing that is long gone. – Tim Dec 15 '11 at 18:02
Yeah, it's long gone, but good idea though :) – Abel Martin Dec 20 '11 at 19:16
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With ruby you can look at rbconfig.rb, specifically CONFIG["configure_args"]. On my Fedora 16 box it is /usr/lib64/ruby/1.8/x86_64-linux/rbconfig.rb.

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Brilliant! That's EXACTLY what I'm looking for. On our machine it's at /usr/lib/ruby/1.8/x86_64-linux/rbconfig.rb. Thanks man!! – Abel Martin Dec 20 '11 at 19:11
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