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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2016 Ludovic Courtès <ludo@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 packages pkg-config)
#:use-module (guix licenses)
#:use-module (guix packages)
#:use-module (guix download)
#:use-module (guix build-system gnu)
#:use-module (guix build-system trivial)
#:export (pkg-config))
;; This is the "primitive" pkg-config package. People should use `pkg-config'
;; (see below) rather than `%pkg-config', but we export `%pkg-config' so that
;; `fold-packages' finds it.
(define-public %pkg-config
(package
(name "pkg-config")
(version "0.29")
(source (origin
(method url-fetch)
(uri (string-append
"http://pkgconfig.freedesktop.org/releases/pkg-config-"
version ".tar.gz"))
(sha256
(base32
"0sq09a39wj4cxf8l2jvkq067g08ywfma4v6nhprnf351s82pfl68"))))
(build-system gnu-build-system)
(arguments `(#:configure-flags '("--with-internal-glib")))
(native-search-paths
(list (search-path-specification
(variable "PKG_CONFIG_PATH")
(files '("lib/pkgconfig" "lib64/pkgconfig" "share/pkgconfig")))))
(home-page "http://www.freedesktop.org/wiki/Software/pkg-config")
(license gpl2+)
(synopsis "Helper tool used when compiling applications and libraries")
(description
"pkg-config is a helper tool used when compiling applications and
libraries. It helps you insert the correct compiler options on the
command line so an application can use gcc -o test test.c `pkg-config
--libs --cflags glib-2.0` for instance, rather than hard-coding values
on where to find glib (or other libraries). It is language-agnostic, so
it can be used for defining the location of documentation tools, for
instance.")))
(define (cross-pkg-config target)
"Return a pkg-config for TARGET, essentially just a wrapper called
`TARGET-pkg-config', as `configure' scripts like it."
;; See <http://www.flameeyes.eu/autotools-mythbuster/pkgconfig/cross-compiling.html>
;; for details.
(package (inherit %pkg-config)
(name (string-append (package-name %pkg-config) "-" target))
(build-system trivial-build-system)
(arguments
`(#:modules ((guix build utils))
#:builder (begin
(use-modules (guix build utils))
(let* ((in (assoc-ref %build-inputs "pkg-config"))
(out (assoc-ref %outputs "out"))
(bin (string-append out "/bin"))
(prog (string-append ,target "-pkg-config"))
(native (string-append in "/bin/pkg-config")))
(mkdir-p bin)
;; Create a `TARGET-pkg-config' -> `pkg-config' symlink.
;; This satisfies the pkg.m4 macros, which use
;; AC_PROG_TOOL to determine the `pkg-config' program
;; name.
(symlink native (string-append bin "/" prog))
;; Also make 'pkg.m4' available, some packages might
;; expect it.
(mkdir-p (string-append out "/share"))
(symlink (string-append in "/share/aclocal")
(string-append out "/share/aclocal"))))))
(native-inputs `(("pkg-config" ,%pkg-config)))
;; Ignore native inputs, and set `PKG_CONFIG_PATH' for target inputs.
(native-search-paths '())
(search-paths (package-native-search-paths %pkg-config))))
(define (pkg-config-for-target target)
"Return a pkg-config package for TARGET, which may be either #f for a native
build, or a GNU triplet."
(if target
(cross-pkg-config target)
%pkg-config))
;; This hack allows us to automatically choose the native or the cross
;; `pkg-config' depending on whether it's being used in a cross-build
;; environment or not.
(define-syntax pkg-config
(identifier-syntax (pkg-config-for-target (%current-target-system))))
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