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;;; 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-system linux-module)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix derivations)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (guix packages)
#: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 (default-kmod)
"Return the default kmod package."
;; Do not use `@' to avoid introducing circular dependencies.
(let ((module (resolve-interface '(gnu packages linux))))
(module-ref module 'kmod)))
(define (default-gcc)
"Return the default gcc package."
;; Do not use `@' to avoid introducing circular dependencies.
(let ((module (resolve-interface '(gnu packages gcc))))
(module-ref module 'gcc-7)))
(define (make-linux-module-builder linux)
(package
(inherit linux)
(name (string-append (package-name linux) "-module-builder"))
(native-inputs
`(("linux" ,linux)
,@(package-native-inputs 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 outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(out-lib-build (string-append out "/lib/modules/build")))
; TODO: Only preserve the minimum, i.e. [Kbuild], Kconfig, scripts, include, ".config".
(copy-recursively "." out-lib-build)
(let* ((linux (assoc-ref inputs "linux")))
(install-file (string-append linux "/System.map")
out-lib-build)
(let ((source (string-append linux "/Module.symvers")))
(if (file-exists? source)
(install-file source out-lib-build))))
#t)))))))))
(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
'(#:source #:target #:gcc #:kmod #:linux #:inputs #:native-inputs))
(and (not target) ;XXX: no cross-compilation
(bag
(name name)
(system system)
(host-inputs `(,@(if source
`(("source" ,source))
'())
,@inputs
,@(standard-packages)))
(build-inputs `(("linux" ,linux) ; for "Module.symvers".
("linux-module-builder"
,(make-linux-module-builder linux))
,@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)))
(outputs outputs)
(build linux-module-build)
(arguments (strip-keyword-arguments private-keywords arguments)))))
(define* (linux-module-build store name inputs
#:key
(search-paths '())
(tests? #t)
(phases '(@ (guix build linux-module-build-system)
%standard-phases))
(outputs '("out"))
(system (%current-system))
(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
`(begin
(use-modules ,@modules)
(linux-module-build #:name ,name
#:source ,(match (assoc-ref inputs "source")
(((? derivation? source))
(derivation->output-path source))
((source)
source)
(source
source))
#:search-paths ',(map search-path-specification->sexp
search-paths)
#:phases ,phases
#:system ,system
#:tests? ,tests?
#:outputs %outputs
#:inputs %build-inputs)))
(define guile-for-build
(match guile
((? package?)
(package-derivation store guile system #:graft? #f))
(#f ; the default
(let* ((distro (resolve-interface '(gnu packages commencement)))
(guile (module-ref distro 'guile-final)))
(package-derivation store guile system #:graft? #f)))))
(build-expression->derivation store name builder
#:system system
#:inputs inputs
#:modules imported-modules
#:outputs outputs
#:guile-for-build guile-for-build
#: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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