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When bisecting the Linux kernel to find a bug (in my case between v4.4 and v4.9), I'm encountering the following build error:

RELOCS  arch/x86/boot/compressed/vmlinux.relocs
Unsupported relocation type: R_X86_64_PLT32 (4)

What can be done against that?

I have found various other places where people report this issue:

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There seems to be an incompatibility with newer versions of binutils.

I found that GNU binutils 2.31.1 results in this bug, but using version 2.30 instead fixes the problem.


Source:

I eventually found the answer in this chat log where user deviosity says:

and keep runnning into the dreaded: Unsupported relocation type: R_X86_64_PLT32 (4) error, which usually is resolved by downgrading binutils to 2.30 versus 2.31

and this comment also confirms it (Ubuntu 16.04 also uses an older binutils version, 2.26.1).

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    Thanks for this! I am now building these kernel versions using a chroot of Ubuntu 16.04. I disabled "Enable loadable module support -> Module signature verification" (CONFIG_MODULE_SIG) in my Fedora kernel config, to avoid an error when I make modules_install on the main system, due to a cryptography library version mismatch. – sourcejedi Jul 3 at 13:47

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