prepare for more architectures

.SRCINFO

@@ -28,7 +28,6 @@ pkgbase = linux
 	source = https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.18.9.tar.sign
 	source = https://github.com/archlinux/linux/releases/download/v6.18.9-arch1/linux-v6.18.9-arch1.patch.zst
 	source = https://github.com/archlinux/linux/releases/download/v6.18.9-arch1/linux-v6.18.9-arch1.patch.zst.sig
-	source = config
 	validpgpkeys = ABAF11C65A2970B130ABE3C479BE3E4300411886
 	validpgpkeys = 647F28654894E3BD457199BE38DBBDC86092693E
 	validpgpkeys = 83BC8889351B5DEBBB68416EB8AC08600F108CDF
@@ -36,18 +35,19 @@ pkgbase = linux
 	sha256sums = SKIP
 	sha256sums = 4815407239a6df15f8e0362ff652f9faf2e558fd774b08645e80ca664128e390
 	sha256sums = SKIP
-	sha256sums = 9fed188f89847418aaf6416b64457a30bee34dcd0fa42a84dbd0f4dfca063402
 	b2sums = 9aed902e41583597cb7595efe77504630a621993d20f89365a93cf2ea4d9790a6361d93cbb7fd7603881a4f82b76394b7e12fb4e4a88c9fedb2d63d64a9d49d3
 	b2sums = SKIP
 	b2sums = 0e9a6bbc9baf4e6706699257e811dcdb7d7e6c946a45f660ee56c564d907efaaac53387b29668ca3fc3082c5badc30ee082dac9d8de2bde72c79365af4050b47
 	b2sums = SKIP
-	b2sums = bef3377ad86440af76e9dde4c29c9f4aaad42f5fe343f7d31f5eb537d6d358602f996f5d63986af275f2e92f94e71dc28c320edc8c03d05bd64dbd8ed23d75dc
+	source_x86_64 = config.x86_64
+	b2sums_x86_64 = bef3377ad86440af76e9dde4c29c9f4aaad42f5fe343f7d31f5eb537d6d358602f996f5d63986af275f2e92f94e71dc28c320edc8c03d05bd64dbd8ed23d75dc
 
 pkgname = linux
 	pkgdesc = The Linux kernel and modules
 	depends = coreutils
 	depends = initramfs
 	depends = kmod
+	optdepends = linux-headers: headers and scripts for building modules
 	optdepends = linux-firmware: firmware images needed for some devices
 	optdepends = scx-scheds: to use sched-ext schedulers
 	optdepends = wireless-regdb: to set the correct wireless channels of your country

PKGBUILD

@@ -5,7 +5,9 @@ pkgver=6.18.9.arch1
 pkgrel=2
 pkgdesc='Linux'
 url='https://github.com/archlinux/linux'
-arch=(x86_64)
+arch=(
+  x86_64
+)
 license=(GPL-2.0-only)
 makedepends=(
   bc
@@ -37,24 +39,24 @@ _srctag=v${pkgver%.*}-${pkgver##*.}
 source=(
   https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
   $url/releases/download/$_srctag/linux-$_srctag.patch.zst{,.sig}
-  config  # the main kernel config file
 )
+source_x86_64=(config.x86_64)
 validpgpkeys=(
   ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
   647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
   83BC8889351B5DEBBB68416EB8AC08600F108CDF  # Jan Alexander Steffens (heftig)
 )
+b2sums=('9aed902e41583597cb7595efe77504630a621993d20f89365a93cf2ea4d9790a6361d93cbb7fd7603881a4f82b76394b7e12fb4e4a88c9fedb2d63d64a9d49d3'
+        'SKIP'
+        '0e9a6bbc9baf4e6706699257e811dcdb7d7e6c946a45f660ee56c564d907efaaac53387b29668ca3fc3082c5badc30ee082dac9d8de2bde72c79365af4050b47'
+        'SKIP')
+b2sums_x86_64=('bef3377ad86440af76e9dde4c29c9f4aaad42f5fe343f7d31f5eb537d6d358602f996f5d63986af275f2e92f94e71dc28c320edc8c03d05bd64dbd8ed23d75dc')
+
 # https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
 sha256sums=('030115ff8fb4cb536d8449dc40ebc3e314e86ba1b316a6ae21091a11cc930578'
             'SKIP'
             '4815407239a6df15f8e0362ff652f9faf2e558fd774b08645e80ca664128e390'
-            'SKIP'
+            'SKIP')
-            '9fed188f89847418aaf6416b64457a30bee34dcd0fa42a84dbd0f4dfca063402')
-b2sums=('9aed902e41583597cb7595efe77504630a621993d20f89365a93cf2ea4d9790a6361d93cbb7fd7603881a4f82b76394b7e12fb4e4a88c9fedb2d63d64a9d49d3'
-        'SKIP'
-        '0e9a6bbc9baf4e6706699257e811dcdb7d7e6c946a45f660ee56c564d907efaaac53387b29668ca3fc3082c5badc30ee082dac9d8de2bde72c79365af4050b47'
-        'SKIP'
-        'bef3377ad86440af76e9dde4c29c9f4aaad42f5fe343f7d31f5eb537d6d358602f996f5d63986af275f2e92f94e71dc28c320edc8c03d05bd64dbd8ed23d75dc')
 
 export KBUILD_BUILD_HOST=archlinux
 export KBUILD_BUILD_USER=$pkgbase
@@ -78,9 +80,9 @@ prepare() {
   done
 
   echo "Setting config..."
-  cp ../config .config
+  cp ../config.$CARCH .config
   make olddefconfig
-  diff -u ../config .config || :
+  diff -u ../config.$CARCH .config || :
 
   make -s kernelrelease > version
   echo "Prepared $pkgbase version $(<version)"
@@ -101,6 +103,7 @@ _package() {
     kmod
   )
   optdepends=(
+    "$pkgbase-headers: headers and scripts for building modules"
     'linux-firmware: firmware images needed for some devices'
     'scx-scheds: to use sched-ext schedulers'
     'wireless-regdb: to set the correct wireless channels of your country'
@@ -143,24 +146,32 @@ _package-headers() {
   cd $_srcname
   local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
+  local karch
+  case $CARCH in
+    x86_64) karch=x86 ;;
+    *) echo "Unknown CARCH $CARCH"; exit 1 ;;
+  esac
+
   echo "Installing build files..."
   install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
     localversion.* version vmlinux tools/bpf/bpftool/vmlinux.h
   install -Dt "$builddir/kernel" -m644 kernel/Makefile
-  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
+  install -Dt "$builddir/arch/$karch" -m644 arch/$karch/Makefile
   cp -t "$builddir" -a scripts
   ln -srt "$builddir" "$builddir/scripts/gdb/vmlinux-gdb.py"
 
-  # required when STACK_VALIDATION is enabled
+  if [[ $(scripts/config -s CONFIG_HAVE_STACK_VALIDATION) = y ]]; then
     install -Dt "$builddir/tools/objtool" tools/objtool/objtool
+  fi
 
-  # required when DEBUG_INFO_BTF_MODULES is enabled
+  if [[ $(scripts/config -s CONFIG_DEBUG_INFO_BTF_MODULES) = y ]]; then
     install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids
+  fi
 
   echo "Installing headers..."
   cp -t "$builddir" -a include
-  cp -t "$builddir/arch/x86" -a arch/x86/include
+  cp -t "$builddir/arch/$karch" -a arch/$karch/include
-  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s
+  install -Dt "$builddir/arch/$karch/kernel" -m644 arch/$karch/kernel/asm-offsets.s
 
   install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
   install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h
@@ -180,8 +191,10 @@ _package-headers() {
   find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;
 
   echo "Installing Rust files..."
+  if [[ $(scripts/config -s CONFIG_RUST) = y ]]; then
     install -Dt "$builddir/rust" -m644 rust/*.rmeta
     install -Dt "$builddir/rust" rust/*.so
+  fi
 
   echo "Installing unstripped VDSO..."
   make INSTALL_MOD_PATH="$pkgdir/usr" vdso_install \
@@ -190,7 +203,7 @@ _package-headers() {
   echo "Removing unneeded architectures..."
   local arch
   for arch in "$builddir"/arch/*/; do
-    [[ $arch = */x86/ ]] && continue
+    [[ $arch = */$karch/ ]] && continue
     echo "Removing $(basename "$arch")"
     rm -r "$arch"
   done

REUSE.toml

@@ -17,8 +17,8 @@ path = [
     "*.timer",
     "*.desktop",
     "*.hook",
-    "config",
     ".gitignore",
+    "config.*",
 ]
 SPDX-FileCopyrightText = "Arch Linux contributors"
 SPDX-License-Identifier = "0BSD"