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* module/Makefile.am: * module/system/base/target.scm: Add a minimal module to parameterize the target system type and inspect properties on it like cpu, vendor, os, endianness, and word size.
76 lines
2.2 KiB
Scheme
76 lines
2.2 KiB
Scheme
;;; Compilation targets
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;; Copyright (C) 2011 Free Software Foundation, Inc.
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;; This library is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU Lesser General Public
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;; License as published by the Free Software Foundation; either
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;; version 3 of the License, or (at your option) any later version.
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;;
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;; This library is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; Lesser General Public License for more details.
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;;
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;; You should have received a copy of the GNU Lesser General Public
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;; License along with this library; if not, write to the Free Software
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;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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;; 02110-1301 USA
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;;; Code:
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(define-module (system base target)
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#:use-module (rnrs bytevectors)
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#:export (target-type with-target
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target-cpu target-vendor target-os
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target-endianness target-word-size))
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;;;
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;;; Target types
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;;;
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(define %target-type (make-fluid))
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(define (target-type)
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(or (fluid-ref %target-type)
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%host-type))
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(define (validate-target target)
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(if (or (not (string? target))
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(let ((parts (string-split target #\-)))
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(or (< 3 (length parts))
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(or-map string-null? parts))))
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(error "invalid target" target)))
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(define (with-target target thunk)
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(validate-target target)
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(with-fluids ((%target-type target))
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(thunk)))
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(define (target-cpu)
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(let ((t (target-type)))
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(substring t 0 (string-index t #\-))))
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(define (target-vendor)
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(let* ((t (target-type))
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(start (1+ (string-index t #\-))))
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(substring t start (string-index t #\- start))))
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(define (target-os)
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(let* ((t (target-type))
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(start (1+ (string-index t #\- (1+ (string-index t #\-))))))
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(substring t start)))
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(define (target-endianness)
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(if (equal? (target-type) %host-type)
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(native-endianness)
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(error "cross-compilation not yet handled" %host-type (target-type))))
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(define (target-word-size)
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(if (equal? (target-type) %host-type)
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((@ (system foreign) sizeof) '*)
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(error "cross-compilation not yet handled" %host-type (target-type))))
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