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-;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2021 Mathieu Othacehe <othacehe@gnu.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 (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-glibc-dynamic-linker
-
- 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 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.
-;;
-;; The 'glibc-dynamic-linker' field is the name of Glibc's dynamic linker for
-;; the corresponding system.
-(define-record-type* <platform> platform make-platform
- platform?
- (target platform-target)
- (system platform-system)
- (linux-architecture platform-linux-architecture
- (default #f))
- (glibc-dynamic-linker platform-glibc-dynamic-linker))
-
-
-;;;
-;;; 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)))