Subject: reproducibility: r-bgx tests CPU at configure time

From: Ricardo Wurmus <[email-masked]>
Date: Sun, 14 Aug 2022 18:28:58 +0200

The r-bgx package tests the CPU of the build node to determine whether
to use -march options.

On my laptop it does not, but on berlin it adds -march=k8 to the
compiler options.

This is due to AX_GCC_ARCHFLAG.

-- 
Ricardo