Hi,

as we've long talked and not really taken action on hardening builds
I've started working on an opt-in way as last discussed in
september 2016, modifying the gnu-build-system with a
#:hardening-flags keyword.

For my testing purposes I will use

> CFLAGS="-fPIE -fstack-protector-all -D_FORTIFY_SOURCE=2" LDFLAGS="-Wl,-z,now 
> -Wl,-z,relro"

which is used by Gentoo, but adjustments (wether to opt-in or
opt-out) will be made.
-- 
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