Return options used to configure R

So in English what you are saying is that there's a file called Makeconf in the etc directory under the R_HOME that contains the information.
That certainly seems to be true for Linux. 
Thanks.

-----Original Message-----
From: G?bor Cs?rdi [mailto:csardi.gabor at gmail.com] 
Sent: 22 January 2016 11:37
To: Tom Quarendon <tom.quarendon at teamwpc.co.uk>
Cc: r-devel at r-project.org
Subject: Re: [Rd] Return options used to configure R

A one liner that should work on most systems:

grep("configure", readLines(file.path(R.home(), "etc", "Makeconf")), value=TRUE)

Gabor

Is there any way to print out the options that where passed to configure when R was built?
I want to build a later version to the one I have on my machine, and I want to build it in the same way, with the same configure options.

Thanks.

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