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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.
This commit is contained in:
Danny Milosavljevic 2019-04-05 11:41:17 +02:00
parent 12327d7447
commit ce6312999f
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2
Makefile.am
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@ -120,6 +120,7 @@ MODULES = \
guix/build-system/gnu.scm \ guix/build-system/gnu.scm \
guix/build-system/guile.scm \ guix/build-system/guile.scm \
guix/build-system/haskell.scm \ guix/build-system/haskell.scm \
guix/build-system/linux-module.scm \
guix/build-system/perl.scm \ guix/build-system/perl.scm \
guix/build-system/python.scm \ guix/build-system/python.scm \
guix/build-system/ocaml.scm \ guix/build-system/ocaml.scm \
@ -173,6 +174,7 @@ MODULES = \
guix/build/texlive-build-system.scm \ guix/build/texlive-build-system.scm \
guix/build/waf-build-system.scm \ guix/build/waf-build-system.scm \
guix/build/haskell-build-system.scm \ guix/build/haskell-build-system.scm \
guix/build/linux-module-build-system.scm \
guix/build/store-copy.scm \ guix/build/store-copy.scm \
guix/build/utils.scm \ guix/build/utils.scm \
guix/build/union.scm \ guix/build/union.scm \

27
doc/guix.texi
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@ -6210,6 +6210,33 @@ is not enabled by default. It can be enabled with @code{#:glib-or-gtk?}.
@end table @end table
@end defvr @end defvr
@defvr {Scheme Variable} linux-module-build-system
@var{linux-module-build-system} allows building Linux kernel modules.
@cindex build phases
This build system is an extension of @var{gnu-build-system}, but with the
following phases changed:
@table @code
@item configure
This phase configures the environment so that the Linux kernel's Makefile
can be used to build the external kernel module.
@item build
This phase uses the Linux kernel's Makefile in order to build the external
kernel module.
@item install
This phase uses the Linux kernel's Makefile in order to install the external
kernel module.
@end table
It is possible and useful to specify the Linux kernel to use for building
the module (in the "arguments" form of a package using the
linux-module-build-system, use the key #:linux to specify it).
@end defvr
Lastly, for packages that do not need anything as sophisticated, a Lastly, for packages that do not need anything as sophisticated, a
``trivial'' build system is provided. It is trivial in the sense that ``trivial'' build system is provided. It is trivial in the sense that
it provides basically no support: it does not pull any implicit inputs, it provides basically no support: it does not pull any implicit inputs,

166
guix/build-system/linux-module.scm Normal file
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@ -0,0 +1,166 @@
;;; 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"))
(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 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)
#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)
(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))
(define linux-module-build-system
(build-system
(name 'linux-module)
(description "The Linux module build system")
(lower lower)))
;;; linux-module.scm ends here

78
guix/build/linux-module-build-system.scm Normal file
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@ -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