Add (guix build-system linux-module).

* guix/build/linux-module-build-system.scm: New file.
* guix/build-system/linux-module.scm: New file.
* doc/guix.texi (Build Systems): Document it.
* Makefile.am (MODULES): Add them.

1 files changed, 78 insertions, 0 deletions

diff --git a/guix/build/linux-module-build-system.scm b/guix/build/linux-module-build-system.scm
new file mode 100644
index 0000000000..a6664f1eca
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+++ b/guix/build/linux-module-build-system.scm
@@ -0,0 +1,78 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Danny Milosavljevic <dannym@scratchpost.org>
+;;;
+;;; 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/>.
+
+(define-module (guix build linux-module-build-system)
+  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
+  #:use-module (guix build utils)
+  #:use-module (ice-9 ftw)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (%standard-phases
+            linux-module-build))
+
+;; Commentary:
+;;
+;; Builder-side code of linux-module build.
+;;
+;; Code:
+
+;; TODO: It might make sense to provide "Module.symvers" in the future.
+(define* (configure #:key inputs #:allow-other-keys)
+  #t)
+
+(define* (build #:key inputs make-flags #:allow-other-keys)
+  (apply invoke "make" "-C"
+         (string-append (assoc-ref inputs "linux-module-builder")
+                        "/lib/modules/build")
+         (string-append "M=" (getcwd))
+         (or make-flags '())))
+
+;; This block was copied from make-linux-libre--only took the "modules_install"
+;; part.
+(define* (install #:key inputs native-inputs outputs #:allow-other-keys)
+  (let* ((out (assoc-ref outputs "out"))
+         (moddir (string-append out "/lib/modules"))
+         (kmod (assoc-ref (or native-inputs inputs) "kmod")))
+    ;; Install kernel modules
+    (mkdir-p moddir)
+    (invoke "make" "-C"
+            (string-append (assoc-ref inputs "linux-module-builder")
+                           "/lib/modules/build")
+            (string-append "M=" (getcwd))
+            (string-append "DEPMOD=" kmod "/bin/depmod")
+            (string-append "MODULE_DIR=" moddir)
+            (string-append "INSTALL_PATH=" out)
+            (string-append "INSTALL_MOD_PATH=" out)
+            "INSTALL_MOD_STRIP=1"
+            "modules_install")))
+
+(define %standard-phases
+  (modify-phases gnu:%standard-phases
+    (replace 'configure configure)
+    (replace 'build build)
+    (replace 'install install)))
+
+(define* (linux-module-build #:key inputs (phases %standard-phases)
+                       #:allow-other-keys #:rest args)
+  "Build the given package, applying all of PHASES in order, with a Linux kernel in attendance."
+  (apply gnu:gnu-build
+         #:inputs inputs #:phases phases
+         args))
+
+;;; linux-module-build-system.scm ends here