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;;; Chickadee Game Toolkit
;;; Copyright © 2016 David Thompson <davet@gnu.org>
;;;
;;; Chickadee is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; Chickadee 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 Lesser General
;;; Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Build time configuration.
;;
;;; Code:
(define-module (chickadee config)
#:use-module (ice-9 match)
#:use-module (system foreign)
#:export (dynamic-link*
%datadir
%chickadee-version
%libopenal
%libvorbisfile
%libmpg123
%libfreetype
%libreadline
scope-datadir))
;; Try to link against multiple library possibilities, such as the
;; absolute file name discovered by ./configure or by searching the
;; library load path as a fallback method. Useful when restributing
;; relocatable builds.
(define (dynamic-link* names)
(let loop ((names* names))
(match names*
(()
(error "could not find library" names))
((name . rest)
(or (false-if-exception (dynamic-link name))
(loop rest))))))
(define %datadir
(or (getenv "CHICKADEE_DATADIR") "@chickadee_datadir@/chickadee"))
(define %chickadee-version "@PACKAGE_VERSION@")
;; When LD_LIBRARY_PATH is set, we *don't* want to use the absolute
;; file name of the library that pkgconfig found. Instead, we want to
;; use the library name itself so the search path is used.
(define-syntax-rule (define-library-name name
(absolute ...)
(relative ...))
(define name
(cond
((getenv "LD_LIBRARY_PATH")
'(relative ...))
(else
'(absolute ...)))))
(define-library-name %libopenal
("@OPENAL_LIBDIR@/libopenal")
("libopenal"))
(define-library-name %libvorbisfile
("@VORBIS_LIBDIR@/libvorbisfile")
("libvorbisfile"))
(define-library-name %libmpg123
("@MPG123_LIBDIR@/libmpg123")
("libmpg123"))
(define-library-name %libfreetype
("@FREETYPE_LIBDIR@/libfreetype")
("libfreetype"))
(define-library-name %libreadline
("@READLINE_LIBDIR@/libreadline")
("libreadline"))
(define (scope-datadir file)
"Append the Chickadee data directory to FILE."
(string-append %datadir "/" file))
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