Pierre Langlois writes:

>> And if I remove it then the error goes away! The build hasn't finished
>> yet for me, but it's gone past the offending xor-neon.c file so we
>> /should/ be good.
>>
>> I'm not really sure why though, do you know why this phase was required
>> at the time? I haven't tested that linux-libre still builds on x86 with
>> this phase removed yet, trying it now.
>
> OK, I've now built kernels with the attached patch on the kernel-updates
> branch for x86_64 and aarch64! I've also tested with
> --system=armhf-linux on the softiron and --system=i868-linux on my x86
> desktop, it all looks good!

> * gnu/packages/linux.scm (make-linux-libre)[arguments]: Remove
> 'work-around-gcc-7-include-path-issue phase.
> ---
>  gnu/packages/linux.scm | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
> index 41991c9e45..d63755d791 100644
> --- a/gnu/packages/linux.scm
> +++ b/gnu/packages/linux.scm
> @@ -35,6 +35,7 @@
>  ;;; Copyright © 2019 Tim Gesthuizen <[email protected]>
>  ;;; Copyright © 2019 Maxim Cournoyer <[email protected]>
>  ;;; Copyright © 2019 Stefan Stefanović <[email protected]>
> +;;; Copyright © 2019 Pierre Langlois <[email protected]>

Whoops, I hadn't realized I had edited this file before, see attached
for a fixed patch.

>From 1f855451dfd4c3068eebcc09cacf79bb6df97cc8 Mon Sep 17 00:00:00 2001
From: Pierre Langlois <[email protected]>
Date: Sun, 14 Jul 2019 12:47:06 +0100
Subject: [PATCH] gnu: linux-libre: Fix build on aarch64.

* gnu/packages/linux.scm (make-linux-libre)[arguments]: Remove
'work-around-gcc-7-include-path-issue phase.
---
 gnu/packages/linux.scm | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 41991c9e45..c1a5bbebc0 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -30,7 +30,7 @@
 ;;; Copyright © 2018 Pierre-Antoine Rouby <[email protected]>
 ;;; Copyright © 2018 Brendan Tildesley <[email protected]>
 ;;; Copyright © 2018 Manuel Graf <[email protected]>
-;;; Copyright © 2018 Pierre Langlois <[email protected]>
+;;; Copyright © 2018, 2019 Pierre Langlois <[email protected]>
 ;;; Copyright © 2018 Vasile Dumitrascu <[email protected]>
 ;;; Copyright © 2019 Tim Gesthuizen <[email protected]>
 ;;; Copyright © 2019 Maxim Cournoyer <[email protected]>
@@ -355,11 +355,6 @@ for ARCH and optionally VARIANT, or #f if there is no such configuration."
              (substitute* (find-files "." "^Makefile(\\.include)?$")
                (("/bin/pwd") "pwd"))
              #t))
-         (add-before 'configure 'work-around-gcc-7-include-path-issue
-           (lambda _
-             (unsetenv "C_INCLUDE_PATH")
-             (unsetenv "CPLUS_INCLUDE_PATH")
-             #t))
          (replace 'configure
            (lambda* (#:key inputs native-inputs target #:allow-other-keys)
              ;; Avoid introducing timestamps
-- 
2.22.0

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