diff options
| -rw-r--r-- | gnu/packages/linux.scm | 128 |
1 files changed, 126 insertions, 2 deletions
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm index 6d2aa89d35..1bff1ccaee 100644 --- a/gnu/packages/linux.scm +++ b/gnu/packages/linux.scm @@ -190,11 +190,31 @@ #:use-module (srfi srfi-2) #:use-module (srfi srfi-26) #:use-module (ice-9 match) - #:use-module (ice-9 regex)) + #:use-module (ice-9 regex) + #:export (customize-linux + make-defconfig)) + +(define (linux-srcarch) + "Return the linux SRCARCH name, which is set in the toplevel Makefile of +Linux and denotes the architecture-specific directory name below arch/ in its +source code. Some few architectures share a common folder. It resembles the +definition of SRCARCH based on ARCH in the Makefile and may be used to place a +defconfig file in the proper path." + (let ((linux-arch (platform-linux-architecture + (lookup-platform-by-target-or-system + (or (%current-target-system) + (%current-system)))))) + (match linux-arch + ("i386" "x86") + ("x86_64" "x86") + ("sparc32" "sparc") + ("sparc64" "sparc") + ("sh64" "sh") + (_ linux-arch)))) (define-public (system->defconfig system) "Some systems (notably powerpc-linux) require a special target for kernel -defconfig. Return the appropriate make target if applicable, otherwise return +defconfig. Return the appropriate Make target if applicable, otherwise return \"defconfig\"." (cond ((string-prefix? "powerpc-" system) "pmac32_defconfig") ((string-prefix? "powerpc64-" system) "ppc64_defconfig") @@ -1247,6 +1267,110 @@ Linux kernel. It has been modified to remove all non-free binary blobs.") (inputs (modify-inputs (package-inputs base-linux-libre) (prepend cpio)))))) + +;;; +;;; Linux kernel customization functions. +;;; + +(define* (customize-linux #:key name + (linux linux-libre) + source + defconfig + (configs "") + extra-version) + "Make a customized Linux package NAME derived from the LINUX package. + +If NAME is not given, then it defaults to the same name as the LINUX package. + +Unless SOURCE is given the source of LINUX is used. + +A DEFCONFIG file to be used can be given as an origin, as a file-like object +(file-append, local-file etc.), or as a string with the name of a defconfig file +available in the Linux sources. If DEFCONFIG is not given, then a defconfig +file will be saved from the LINUX package configuration. + +Additional CONFIGS will be used to modify the given or saved defconfig, which +will finally be used to build Linux. + +CONFIGS can be a list of strings, with one configuration per line. The usual +defconfig syntax has to be used, but there is a special extension to ease the +removal of configurations. Comment lines are supported as well. + +Here is an example: + + '(;; This string defines the version tail in 'uname -r'. + \"CONFIG_LOCALVERSION=\\\"-handcrafted\\\" + ;; This '# CONFIG_... is not set' syntax has to match exactly! + \"# CONFIG_BOOT_CONFIG is not set\" + \"CONFIG_NFS_SWAP=y\" + ;; This is a multiline configuration: + \"CONFIG_E1000=y +# This is a comment, below follows an extension to unset a configuration: +CONFIG_CMDLINE_EXTEND\") + +A string of configurations instead of a list of configuration strings is also +possible. + +EXTRA-VERSION can be a string overwriting the EXTRAVERSION setting of the LINUX +package, after being prepended by a hyphen. It will be visible in the output +of 'uname -r' behind the Linux version numbers." + (package + (inherit linux) + (name (or name (package-name linux))) + (source (or source (package-source linux))) + (arguments + (substitute-keyword-arguments + (package-arguments linux) + ((#:imported-modules imported-modules %gnu-build-system-modules) + `((guix build kconfig) ,@imported-modules)) + ((#:modules modules) + `((guix build kconfig) ,@modules)) + ((#:phases phases) + #~(modify-phases #$phases + (replace 'configure + (lambda* (#:key inputs #:allow-other-keys #:rest arguments) + (setenv "EXTRAVERSION" + #$(and extra-version + (not (string-null? extra-version)) + (string-append "-" extra-version))) + (let* ((configs + (string-append "arch/" #$(linux-srcarch) "/configs/")) + (guix_defconfig + (string-append configs "guix_defconfig"))) + #$(cond + ((not defconfig) + #~(begin + ;; Call the original 'configure phase. + (apply (assoc-ref #$phases 'configure) arguments) + ;; Save a defconfig file. + (invoke "make" "savedefconfig") + ;; Move the saved defconfig to the proper location. + (rename-file "defconfig" + guix_defconfig))) + ((string? defconfig) + ;; Use another existing defconfig from the Linux sources. + #~(rename-file (string-append configs #$defconfig) + guix_defconfig)) + (else + ;; Copy the defconfig input to the proper location. + #~(copy-file (assoc-ref inputs "guix_defconfig") + guix_defconfig))) + (chmod guix_defconfig #o644) + (modify-defconfig guix_defconfig '#$configs) + (invoke "make" "guix_defconfig") + (verify-config ".config" guix_defconfig)))))))) + (native-inputs + (append (if (or (not defconfig) + (string? defconfig)) + '() + ;; The defconfig should be an origin or file-like object. + `(("guix_defconfig" ,defconfig))) + (package-native-inputs linux))))) + +(define (make-defconfig uri sha256-as-base32) + (origin (method url-fetch) + (uri uri) + (sha256 (base32 sha256-as-base32)))) ;;; |