205 lines
		
	
	
		
			8.9 KiB
		
	
	
	
		
			Scheme
		
	
	
	
			
		
		
	
	
			205 lines
		
	
	
		
			8.9 KiB
		
	
	
	
		
			Scheme
		
	
	
	
(cond-expand
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  ((or chicken-5 chicken-6)
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   (define-syntax pffi-init
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     (er-macro-transformer
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       (lambda (expr rename compare)
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         '(import (chicken foreign)
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                  (chicken memory))))))
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  (else
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    (define pffi-init
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      (lambda () #t))))
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(define (pffi-type? object)
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  (if (equal? (size-of-type object) #f)
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    #f
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    #t))
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(define (pffi-size-of object)
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  (cond ((pffi-struct? object) (pffi-struct-size object))
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        ((pffi-union? object) (pffi-union-size object))
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        ((pffi-type? object) (size-of-type object))
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        (else (error "Not pffi-struct, pffi-enum of pffi-type" object))))
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(define pffi-types
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  '(int8
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     uint8
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     int16
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     uint16
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     int32
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     uint32
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     int64
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     uint64
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     char
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     unsigned-char
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     short
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     unsigned-short
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     int
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     unsigned-int
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     long
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     unsigned-long
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     float
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     double
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     string
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     pointer
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     void))
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(define string-split
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  (lambda (str mark)
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    (let* ((str-l (string->list str))
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           (res (list))
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           (last-index 0)
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           (index 0)
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           (splitter (lambda (c)
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                       (cond ((char=? c mark)
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                              (begin
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                                (set! res (append res (list (string-copy str last-index index))))
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                                (set! last-index (+ index 1))))
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                             ((equal? (length str-l) (+ index 1))
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                              (set! res (append res (list (string-copy str last-index (+ index 1)))))))
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                       (set! index (+ index 1)))))
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      (for-each splitter str-l)
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      res)))
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(cond-expand
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  (gambit
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    (define-macro
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      (pffi-shared-object-auto-load headers object-name . options)
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      `(pffi-shared-object-load ,(car headers))))
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  (else
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    (define pffi-shared-object-auto-load
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      (lambda (headers object-name . options)
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        (cond-expand
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          (chicken (pffi-shared-object-load headers))
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          (cyclone (pffi-shared-object-load headers))
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          (else
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            (let* ((additional-paths (if (assoc 'additional-paths options)
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                                       (cdr (assoc 'additional-paths options))
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                                       (list)))
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                   (additional-versions (if (assoc 'additional-versions options)
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                                          (map (lambda (version)
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                                                 (if (number? version)
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                                                   (number->string version)
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                                                   version))
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                                               (cdr (assoc 'additional-versions options)))
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                                          (list)))
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                   (slash (cond-expand (windows (string #\\)) (else "/")))
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                   (auto-load-paths
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                     (cond-expand
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                       (windows
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                         (append
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                           (if (get-environment-variable "SYSTEM")
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                             (list (get-environment-variable "SYSTEM"))
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                             (list))
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                           (if (get-environment-variable "WINDIR")
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                             (list (get-environment-variable "WINDIR"))
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                             (list))
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                           (if (get-environment-variable "WINEDLLDIR0")
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                             (list (get-environment-variable "WINEDLLDIR0"))
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                             (list))
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                           (if (get-environment-variable "SystemRoot")
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                             (list (string-append
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                                     (get-environment-variable "SystemRoot")
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                                     slash
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                                     "system32"))
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                             (list))
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                           (list ".")
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                           (if (get-environment-variable "PATH")
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                             (string-split (get-environment-variable "PATH") #\;)
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                             (list))
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                           (if (get-environment-variable "PWD")
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                             (list (get-environment-variable "PWD"))
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                             (list))))
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                       (else
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                         (append
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                           ; Guix
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                           (list (if (get-environment-variable "GUIX_ENVIRONMENT")
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                                   (string-append (get-environment-variable "GUIX_ENVIRONMENT") slash "lib")
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                                   "")
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                                 "/run/current-system/profile/lib")
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                           ; Debian
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                           (if (get-environment-variable "LD_LIBRARY_PATH")
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                             (string-split (get-environment-variable "LD_LIBRARY_PATH") #\:)
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                             (list))
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                           (list
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                             ;;; x86-64
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                             ; Debian
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                             "/lib/x86_64-linux-gnu"
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                             "/usr/lib/x86_64-linux-gnu"
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                             "/usr/local/lib"
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                             ; Fedora/Alpine
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                             "/usr/lib"
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                             "/usr/lib64"
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                             ;;; aarch64
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                             ; Debian
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                             "/lib/aarch64-linux-gnu"
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                             "/usr/lib/aarch64-linux-gnu"
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                             "/usr/local/lib"
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                             ; Fedora/Alpine
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                             "/usr/lib"
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                             "/usr/lib64"
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                             ; NetBSD
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                             "/usr/pkg/lib")))))
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                   (auto-load-versions (list ""))
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                   (paths (append auto-load-paths additional-paths))
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                   (versions (append additional-versions auto-load-versions))
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                   (platform-lib-prefix
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                     (cond-expand
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                       ;(racket (if (equal? (system-type 'os) 'windows) "" "lib"))
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                       (windows "")
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                       (else "lib")))
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                   (platform-file-extension
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                     (cond-expand
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                       ;(racket (if (equal? (system-type 'os) 'windows) ".dll" ".so"))
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                       (windows ".dll")
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                       (else ".so")))
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                   (shared-object #f)
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                   (searched-paths (list)))
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              (for-each
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                (lambda (path)
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                  (for-each
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                    (lambda (version)
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                      (let ((library-path
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                              (string-append path
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                                             slash
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                                             platform-lib-prefix
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                                             object-name
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                                             (cond-expand
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                                               (windows "")
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                                               (else platform-file-extension))
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                                             (if (string=? version "")
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                                               ""
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                                               (string-append
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                                                 (cond-expand (windows "-")
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                                                              (else "."))
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                                                 version))
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                                             (cond-expand
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                                               (windows platform-file-extension)
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                                               (else ""))))
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                            (library-path-without-suffixes (string-append path
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                                                                          slash
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                                                                          platform-lib-prefix
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                                                                          object-name)))
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                        (set! searched-paths (append searched-paths (list library-path)))
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                        (when (and (not shared-object)
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                                   (file-exists? library-path))
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                          (set! shared-object
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                            (cond-expand (racket library-path-without-suffixes)
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                                         (else library-path))))))
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                    versions))
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                paths)
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              (if (not shared-object)
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                (begin
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                  (display "Could not load shared object: ")
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                  (write (list (cons 'object object-name)
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                               (cons 'paths paths)
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                               (cons 'platform-file-extension platform-file-extension)
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                               (cons 'versions versions)))
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                  (newline)
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                  (display "Searched paths: ")
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                  (write searched-paths)
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                  (newline)
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                  (exit 1))
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                (pffi-shared-object-load headers
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                                         shared-object
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                                         `((additional-versions ,versions)))))))))))
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