From d5454dc3f2b04e211c3e1cc420a5b3b6eced8104 Mon Sep 17 00:00:00 2001
From: Emily Trau <emily@downunderctf.com>
Date: Sun, 8 Oct 2023 21:42:55 -0700
Subject: [PATCH] minimal-bootstrap.linux-headers: 4.14.67 -> 6.5.6, build from
 source

---
 .../linux/minimal-bootstrap/default.nix       |  6 ++-
 .../linux-headers/default.nix                 | 49 ++++++++++++-------
 2 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/pkgs/os-specific/linux/minimal-bootstrap/default.nix b/pkgs/os-specific/linux/minimal-bootstrap/default.nix
index 6994d980b51a..70c374e96a3f 100644
--- a/pkgs/os-specific/linux/minimal-bootstrap/default.nix
+++ b/pkgs/os-specific/linux/minimal-bootstrap/default.nix
@@ -205,7 +205,11 @@ lib.makeScope
 
       heirloom-devtools = callPackage ./heirloom-devtools { tinycc = tinycc-mes; };
 
-      linux-headers = callPackage ./linux-headers { bash = bash_2_05; };
+      linux-headers = callPackage ./linux-headers {
+        gcc = gcc-latest;
+        gnumake = gnumake-musl;
+        gnutar = gnutar-latest;
+      };
 
       ln-boot = callPackage ./ln-boot { };
 
diff --git a/pkgs/os-specific/linux/minimal-bootstrap/linux-headers/default.nix b/pkgs/os-specific/linux/minimal-bootstrap/linux-headers/default.nix
index 255e6c1ee62a..7fa036e53b2c 100644
--- a/pkgs/os-specific/linux/minimal-bootstrap/linux-headers/default.nix
+++ b/pkgs/os-specific/linux/minimal-bootstrap/linux-headers/default.nix
@@ -2,26 +2,25 @@
   lib,
   fetchurl,
   bash,
+  gcc,
+  musl,
+  binutils,
+  gnumake,
+  gnused,
+  gnugrep,
+  gawk,
+  diffutils,
+  findutils,
   gnutar,
   xz,
 }:
 let
-  # WARNING: You probably don't want to use this package outside minimal-bootstrap
-  #
-  # We need some set of Linux kernel headers to build our bootstrap packages
-  # (gcc/binutils/glibc etc.) against. As long as it compiles it is "good enough".
-  # Therefore the requirement for correctness, completeness, platform-specific
-  # features, and being up-to-date, are very loose.
-  #
-  # Rebuilding the Linux headers from source correctly is something we can defer
-  # till we have access to gcc/binutils/perl. For now we can use Guix's assembled
-  # kernel header distribution and assume it's good enough.
   pname = "linux-headers";
-  version = "4.14.67";
+  version = "6.5.6";
 
   src = fetchurl {
-    url = "mirror://gnu/gnu/guix/bootstrap/i686-linux/20190815/linux-libre-headers-stripped-4.14.67-i686-linux.tar.xz";
-    sha256 = "0sm2z9x4wk45bh6qfs94p0w1d6hsy6dqx9sw38qsqbvxwa1qzk8s";
+    url = "mirror://kernel/linux/kernel/v${lib.versions.major version}.x/linux-${version}.tar.xz";
+    hash = "sha256-eONtQhRUcFHCTfIUD0zglCjWxRWtmnGziyjoCUqV0vY=";
   };
 in
 bash.runCommand "${pname}-${version}"
@@ -29,6 +28,15 @@ bash.runCommand "${pname}-${version}"
     inherit pname version;
 
     nativeBuildInputs = [
+      gcc
+      musl
+      binutils
+      gnumake
+      gnused
+      gnugrep
+      gawk
+      diffutils
+      findutils
       gnutar
       xz
     ];
@@ -36,17 +44,20 @@ bash.runCommand "${pname}-${version}"
     meta = {
       description = "Header files and scripts for Linux kernel";
       license = lib.licenses.gpl2Only;
-      teams = [ lib.teams.minimal-bootstrap ];
       platforms = lib.platforms.linux;
+      teams = [ lib.teams.minimal-bootstrap ];
     };
   }
   ''
     # Unpack
-    cp ${src} linux-headers.tar.xz
-    unxz linux-headers.tar.xz
-    tar xf linux-headers.tar
+    tar xf ${src}
+    cd linux-${version}
+
+    # Build
+    make -j $NIX_BUILD_CORES CC=musl-gcc HOSTCC=musl-gcc ARCH=x86 headers
 
     # Install
-    mkdir $out
-    cp -r include $out
+    find usr/include -name '.*' -exec rm {} +
+    mkdir -p $out
+    cp -rv usr/include $out/
   ''