@@ -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)))
* gnu/platform.scm (platform-modules, systems, targets, lookup-platform-by-system, lookup-platform-by-target, lookup-platform-by-target-or-system platform-system->target, platform-target->system): New procedures. (%platforms): New variable. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org> --- gnu/platform.scm | 101 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 98 insertions(+), 3 deletions(-)