etc: Add cross-compile manifest.

* etc/manifests/cross-compile.scm: New file.

Change-Id: I63ac4014617e8d716c508a04c6da553e36a99fec

1 files changed, 167 insertions, 0 deletions

diff --git a/etc/manifests/cross-compile.scm b/etc/manifests/cross-compile.scm
new file mode 100644
index 0000000000..280489cc19
--- /dev/null
+++ b/etc/manifests/cross-compile.scm
@@ -0,0 +1,167 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020-2022, 2024 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2023 Andreas Enge <andreas@enge.fr>
+;;; Copyright © 2025 Efraim Flashner <efraim@flashner.co.il>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; This file returns a manifest containing packages which should all cross-compile.
+;;; We use the packages included by default in an OS configuration since that is
+;;; (probably) the most likely install method for some architectures.
+
+(use-modules (gnu packages)
+             (guix packages)
+             (guix profiles)
+             (guix platform)
+             ((gnu services xorg) #:select (%default-xorg-modules))
+             ((gnu system) #:prefix gnu-system:
+                           #:select (%base-packages %base-packages-linux))
+             (guix utils)
+             (guix gexp)
+             (srfi srfi-1)
+             (srfi srfi-26))
+
+(define* (package->manifest-entry* package system
+                                   #:key target)
+  "Return a manifest entry for PACKAGE on SYSTEM, optionally cross-compiled to
+TARGET."
+  (manifest-entry
+    (inherit (package->manifest-entry package))
+    (name (string-append (package-name package) "." system
+                         (if target
+                             (string-append "." target)
+                             "'")))
+    (item (with-parameters ((%current-system system)
+                            (%current-target-system target))
+            package))))
+
+(define %base-packages
+  ;; Packages that must be substitutable on all the platforms Guix supports.
+  ;; Use the %base-packages from (gnu system) since they are included by default
+  ;; in the packages field of the operating system configuration.
+  (cons* (specification->package "guix")
+         gnu-system:%base-packages))
+
+(define %base-packages/hurd
+  ;; Remove the packages from %base-packages-linux and some of the packages
+  ;; from the other package sets.
+  (fold delete %base-packages
+        (append (map specification->package
+                     '("e2fsprogs" "kbd" "iproute2" "iw" "wireless-tools"))
+                %base-packages-linux)))
+
+(define %system-packages
+  ;; Key packages proposed by the Guix System installer.
+  (map specification->package
+       '("openssh" "tor" "ntp" "gpm"
+         "connman" "network-manager" "wpa-supplicant" "isc-dhcp" "cups"
+         "linux-libre" "grub-hybrid")))
+
+(define %system-gui-packages
+  ;; Key packages proposed by the Guix System installer.
+  (append (map specification->package
+               '("enlightenment"
+                 ;; build system `python' does not support cross builds
+                 ;"gnome" "xfce" "mate" "openbox"
+                 "awesome"
+                 "i3-wm" "i3status" "dmenu" "st"
+                 "ratpoison" "xterm"
+                 ;; build system `emacs' does not support cross builds
+                 ;"emacs-exwm" "emacs-desktop-environment"
+                 "emacs"))
+          %default-xorg-modules))
+
+(define %packages-to-cross-build
+  ;; Packages that must be cross-buildable from x86_64-linux.
+  ;; FIXME: Add (@ (gnu packages gcc) gcc) when <https://bugs.gnu.org/40463>
+  ;; is fixed.
+  (append (list (@ (gnu packages guile) guile-3.0/pinned))
+          (map specification->package
+               '("coreutils" "grep" "sed" "findutils" "diffutils" "patch"
+                 "gawk" "gettext" "gzip" "xz" "zstd"
+                 "hello" "zlib"))))
+
+(define %packages-to-cross-build-for-mingw
+  ;; Many things don't build for MinGW.  Restrict to what's known to work
+  ;; to test that the cross-compiler itself works.
+  (map specification->package '("hello")))
+
+
+;;;
+;;; Manifests.
+;;;
+
+;; As per the Guix Survey of 2024 we only worry about cross compiling from
+;; x86_64-linux (98% of users) and not from others (aarch64 with 19%).
+(define %cross-manifest
+  (manifest
+    (append-map (lambda (target)
+                  (map (cut package->manifest-entry* <> "x86_64-linux"
+                            #:target target)
+                       (if (target-mingw? target)
+                           %packages-to-cross-build-for-mingw
+                           %packages-to-cross-build)))
+                (fold delete (targets)
+                      '(;; Disable cross-compilation to self:
+                        "x86_64-linux-gnu"
+
+                        ;; mips64el commonly targets a different architecture
+                        ;; revision than we targeted in Guix.
+                        "mips64el-linux-gnu"
+
+                        ;; Ignore bare-metal targets.
+                        "avr"
+                        "or1k-elf"
+                        "xtensa-ath9k-elf")))))
+
+(define %cross-system
+  (manifest
+    (cons*
+      ;; Include a couple of extra kernels that are commonly used:
+      (package->manifest-entry* (@ (gnu packages linux)
+                                   linux-libre-arm64-generic)
+                                "x86_64-linux"
+                                #:target "aarch64-linux-gnu")
+      (package->manifest-entry* (@ (gnu packages linux)
+                                   linux-libre-arm-generic)
+                                "x86_64-linux"
+                                #:target "arm-linux-gnueabihf")
+      (package->manifest-entry* (@ (gnu packages linux)
+                                   linux-libre-riscv64-generic)
+                                "x86_64-linux"
+                                #:target "riscv64-linux-gnu")
+      (append-map (lambda (target)
+                    (map (cut package->manifest-entry* <> "x86_64-linux"
+                              #:target target)
+                         (append %base-packages
+                                 %system-packages
+                                 ;; With a graphical environment:
+                                 (if (or (target-x86-32? target)
+                                         (target-aarch64? target))
+                                     %system-gui-packages
+                                     '()))))
+                  (fold delete (map platform-system->target (systems))
+                        '(;; Disable cross-compilation to self:
+                          "x86_64-linux-gnu"
+
+                          ;; Ignore obsolete systems, as in (gnu ci).
+                          "mips64el-linux-gnu"
+                          "powerpc-linux-gnu"))))))
+
+;; Return the union of all the manifests.
+(concatenate-manifests (list %cross-manifest
+                             %cross-system))