diff options
Diffstat (limited to 'gnu/platform.scm')
| -rw-r--r-- | gnu/platform.scm | 101 |
1 files changed, 98 insertions, 3 deletions
diff --git a/gnu/platform.scm b/gnu/platform.scm index bb6519c71a..4c5211e107 100644 --- a/gnu/platform.scm +++ b/gnu/platform.scm @@ -17,22 +17,117 @@ ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. (define-module (gnu platform) + #:use-module (guix discovery) + #:use-module (guix memoization) #:use-module (guix records) + #:use-module (guix ui) + #:use-module (srfi srfi-1) #:export (platform platform? platform-target platform-system - platform-linux-architecture)) + platform-linux-architecture + + platform-modules + platforms + lookup-platform-by-system + lookup-platform-by-target + lookup-platform-by-target-or-system + platform-system->target + platform-target->system + + systems + targets)) ;;; ;;; Platform record. ;;; -;; Description of a platform supported by the GNU system. +;; Description of a platform supported by GNU Guix. +;; +;; The 'target' field must be a valid GNU triplet as defined here: +;; https://www.gnu.org/software/autoconf/manual/autoconf-2.68/html_node/Specifying-Target-Triplets.html. +;; It is used for cross-compilation purposes. +;; +;; The 'system' field is the name of the corresponding system as defined in +;; the (gnu packages bootstrap) module. It can be for instance +;; "aarch64-linux" or "armhf-linux". It is used to emulate a different host +;; architecture, for instance i686-linux on x86_64-linux-gnu, or armhf-linux +;; on x86_64-linux, using the QEMU binfmt transparent emulation mechanism. +;; +;; The 'linux-architecture' is only relevant if the kernel is Linux. In that +;; case, it corresponds to the ARCH variable used when building Linux. (define-record-type* <platform> platform make-platform platform? (target platform-target) ;"x86_64-linux-gnu" (system platform-system) ;"x86_64-linux" - (linux-architecture platform-linux-architecture ;"amd64" + (linux-architecture platform-linux-architecture ;"x86" (default #f))) + +;;; +;;; Platforms. +;;; + +(define (platform-modules) + "Return the list of platform modules." + (all-modules (map (lambda (entry) + `(,entry . "gnu/platforms")) + %load-path) + #:warn warn-about-load-error)) + +(define platforms + ;; The list of publically-known platforms. + (memoize + (lambda () + (fold-module-public-variables (lambda (obj result) + (if (platform? obj) + (cons obj result) + result)) + '() + (platform-modules))))) + +(define (lookup-platform-by-system system) + "Return the platform corresponding to the given SYSTEM." + (find (lambda (platform) + (let ((s (platform-system platform))) + (and (string? s) (string=? s system)))) + (platforms))) + +(define (lookup-platform-by-target target) + "Return the platform corresponding to the given TARGET." + (find (lambda (platform) + (let ((t (platform-target platform))) + (and (string? t) (string=? t target)))) + (platforms))) + +(define (lookup-platform-by-target-or-system target-or-system) + "Return the platform corresponding to the given TARGET or SYSTEM." + (or (lookup-platform-by-target target-or-system) + (lookup-platform-by-system target-or-system))) + +(define (platform-system->target system) + "Return the target matching the given SYSTEM if it exists or false +otherwise." + (let ((platform (lookup-platform-by-system system))) + (and=> platform platform-target))) + +(define (platform-target->system target) + "Return the system matching the given TARGET if it exists or false +otherwise." + (let ((platform (lookup-platform-by-target system))) + (and=> platform platform-system))) + + +;;; +;;; Systems & Targets. +;;; + +(define (systems) + "Return the list of supported systems." + (delete-duplicates + (filter-map platform-system (platforms)))) + +(define (targets) + "Return the list of supported targets." + (map platform-target (platforms))) |