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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 Ludovic Courtès <ludo@gnu.org>
;;; 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-system linux-module)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (guix packages)
#:use-module (guix platform)
#:use-module (ice-9 match)
#:export (%linux-module-build-system-modules
linux-module-build
linux-module-build-system))
;; Commentary:
;;
;; Code:
(define %linux-module-build-system-modules
;; Build-side modules imported by default.
`((guix build linux-module-build-system)
,@%gnu-build-system-modules))
(define (default-linux)
"Return the default Linux package."
;; Do not use `@' to avoid introducing circular dependencies.
(let ((module (resolve-interface '(gnu packages linux))))
(module-ref module 'linux-libre)))
(define (system->arch system)
(platform-linux-architecture (lookup-platform-by-target-or-system system)))
(define (make-linux-module-builder linux)
(package
(inherit linux)
(name (string-append (package-name linux) "-module-builder"))
(inputs
`(("linux" ,linux)))
(arguments
(substitute-keyword-arguments (package-arguments linux)
((#:phases phases)
#~(modify-phases #$phases
(replace 'build
(lambda _
(invoke "make" "modules_prepare")))
(delete 'strip) ;faster
(replace 'install
(lambda* (#:key inputs #:allow-other-keys)
(let ((out-lib-build (string-append #$output "/lib/modules/build")))
;; Delete some huge items that we probably don't need.
;; TODO: Only preserve the minimum, i.e. [Kbuild], Kconfig,
;; scripts, include, ".config".
(copy-recursively "." out-lib-build)
(for-each (lambda (name)
(when (file-exists? name)
(delete-file-recursively name)))
(map (lambda (name)
(string-append out-lib-build "/" name))
'("arch" ; 137 MB
;;"tools" ; 44 MB built by our 'build phase
"tools/testing" ; 14 MB
"tools/perf" ; 17 MB
"drivers" ; 600 MB
"Documentation" ; 52 MB
"fs" ; 43 MB
"net" ; 33 MB
"samples" ; 2 MB
"sound"))) ; 40 MB
;; Reinstate arch/**/dts since "scripts/dtc" depends on it.
;; Reinstate arch/**/include directories.
;; Reinstate arch/**/Makefile.
;; Reinstate arch/**/module.lds.
(for-each
(lambda (name)
(mkdir-p (dirname (string-append out-lib-build "/" name)))
(copy-recursively name
(string-append out-lib-build "/" name)))
(append (find-files "arch" "^(dts|include)$"
#:directories? #t)
(find-files "arch" "^(Makefile|module.lds)$")))
(let* ((linux #$(this-package-input "linux")))
(install-file (string-append linux "/System.map")
out-lib-build)
(let ((source (string-append linux "/Module.symvers")))
(when (file-exists? source)
(install-file source out-lib-build)))))))))))))
(define* (lower name
#:key source inputs native-inputs outputs
system target
(linux (default-linux))
#:allow-other-keys
#:rest arguments)
"Return a bag for NAME."
(define private-keywords
`(#:target #:gcc #:kmod #:linux #:inputs #:native-inputs
,@(if target '() '(#:target))))
(bag
(name name)
(system system) (target target)
(build-inputs `(,@(if source
`(("source" ,source))
'())
,@native-inputs
;; TODO: Remove "gmp", "mpfr", "mpc" since they are
;; only needed to compile the gcc plugins. Maybe
;; remove "flex", "bison", "elfutils", "perl",
;; "openssl". That leaves very little ("bc", "gcc",
;; "kmod").
,@(package-native-inputs linux)
,@(if target
;; Use the standard cross inputs of
;; 'gnu-build-system'.
(standard-cross-packages target 'host)
'())
;; Keep the standard inputs of 'gnu-build-system'.
,@(standard-packages)))
(host-inputs `(,@inputs
("linux" ,linux)
("linux-module-builder"
,(make-linux-module-builder linux))))
(target-inputs (if target
(standard-cross-packages target 'target)
'()))
(outputs outputs)
(build (if target linux-module-build-cross linux-module-build))
(arguments (strip-keyword-arguments private-keywords arguments))))
(define* (linux-module-build name inputs
#:key
source target
(search-paths '())
(tests? #t)
(phases '%standard-phases)
(outputs '("out"))
(make-flags ''())
(parallel-build? #t)
(system (%current-system))
(source-directory ".")
(guile #f)
(substitutable? #t)
(imported-modules
%linux-module-build-system-modules)
(modules '((guix build linux-module-build-system)
(guix build utils))))
"Build SOURCE using LINUX, and with INPUTS."
(define builder
(with-imported-modules imported-modules
#~(begin
(use-modules #$@(sexp->gexp modules))
#$(with-build-variables inputs outputs
#~(linux-module-build #:name #$name
#:source #+source
#:source-directory #$source-directory
#:search-paths '#$(sexp->gexp
(map search-path-specification->sexp
search-paths))
#:phases #$phases
#:system #$system
#:target #$target
#:arch #$(system->arch (or target system))
#:tests? #$tests?
#:outputs #$(outputs->gexp outputs)
#:make-flags #$make-flags
#:parallel-build? #$parallel-build?
#:inputs #$(input-tuples->gexp inputs))))))
(mlet %store-monad ((guile (package->derivation (or guile (default-guile))
system #:graft? #f)))
(gexp->derivation name builder
#:system system
#:guile-for-build guile
#:substitutable? substitutable?)))
(define* (linux-module-build-cross
name
#:key
source target
build-inputs target-inputs host-inputs
(guile #f)
(outputs '("out"))
(make-flags ''())
(parallel-build? #t)
(search-paths '())
(native-search-paths '())
(tests? #f)
(phases '%standard-phases)
(system (%current-system))
(source-directory ".")
(substitutable? #t)
(imported-modules
%linux-module-build-system-modules)
(modules '((guix build linux-module-build-system)
(guix build utils))))
(define builder
(with-imported-modules imported-modules
#~(begin
(use-modules #$@(sexp->gexp modules))
(define %build-host-inputs
'#+(input-tuples->gexp build-inputs))
(define %build-target-inputs
(append #$(input-tuples->gexp host-inputs)
#+(input-tuples->gexp target-inputs)))
(linux-module-build #:name #$name
#:source #+source
#:source-directory #$source-directory
#:system #$system
#:target #$target
#:arch #$(system->arch (or target system))
#:outputs #$(outputs->gexp outputs)
#:make-flags #$make-flags
#:inputs %build-target-inputs
#:native-inputs %build-host-inputs
#:search-paths
'#$(sexp->gexp
(map search-path-specification->sexp
search-paths))
#:native-search-paths
'#$(map
search-path-specification->sexp
native-search-paths)
#:phases #$phases
#:tests? #$tests?))))
(mlet %store-monad ((guile (package->derivation (or guile (default-guile))
system #:graft? #f)))
(gexp->derivation name builder
#:system system
#:guile-for-build guile
#:substitutable? substitutable?)))
(define linux-module-build-system
(build-system
(name 'linux-module)
(description "The Linux module build system")
(lower lower)))
;;; linux-module.scm ends here
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