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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2021 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; 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)
#:export (%standard-phases
linux-module-build))
;; Commentary:
;;
;; Builder-side code of linux-module build.
;;
;; Code:
;; Similar to make-linux-libre's "configure" phase.
(define* (configure #:key inputs target arch #:allow-other-keys)
(setenv "KCONFIG_NOTIMESTAMP" "1")
(setenv "KBUILD_BUILD_TIMESTAMP" (getenv "SOURCE_DATE_EPOCH"))
(setenv "ARCH" arch)
(format #t "`ARCH' set to `~a'~%" (getenv "ARCH"))
(when target
;; TODO? (setenv "EXTRA_VERSION" ,extra-version)
;; TODO? kernel ".config".
(setenv "CROSS_COMPILE" (string-append target "-"))
(format #t "`CROSS_COMPILE' set to `~a'~%"
(getenv "CROSS_COMPILE"))))
(define* (build #:key (make-flags '()) (parallel-build? #t)
(source-directory ".")
inputs
#:allow-other-keys)
(apply invoke "make" "-C"
(string-append (assoc-ref inputs "linux-module-builder")
"/lib/modules/build")
(string-append "M=" (canonicalize-path source-directory))
`(,@(if parallel-build?
`("-j" ,(number->string (parallel-job-count)))
'())
,@make-flags)))
;; Similar to the "modules_install" part of make-linux-libre.
(define* (install #:key (make-flags '()) (parallel-build? #t)
(source-directory ".")
inputs native-inputs outputs
#:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(moddir (string-append out "/lib/modules")))
;; Install kernel modules
(mkdir-p moddir)
(apply invoke "make" "-C"
(string-append (assoc-ref inputs "linux-module-builder")
"/lib/modules/build")
(string-append "M=" (canonicalize-path source-directory))
;; Disable depmod because the Guix system's module directory
;; is an union of potentially multiple packages. It is not
;; possible to use depmod to usefully calculate a dependency
;; graph while building only one of those packages.
"DEPMOD=true"
(string-append "MODULE_DIR=" moddir)
(string-append "INSTALL_PATH=" out)
(string-append "INSTALL_MOD_PATH=" out)
"INSTALL_MOD_STRIP=1"
"modules_install"
`(,@(if parallel-build?
`("-j" ,(number->string (parallel-job-count)))
'())
,@make-flags))))
(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
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