gnu/packages/pkg-config.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
   3 ;;;
   4 ;;; This file is part of GNU Guix.
   5 ;;;
   6 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   7 ;;; under the terms of the GNU General Public License as published by
   8 ;;; the Free Software Foundation; either version 3 of the License, or (at
   9 ;;; your option) any later version.
  10 ;;;
  11 ;;; GNU Guix is distributed in the hope that it will be useful, but
  12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;;; GNU General Public License for more details.
  15 ;;;
  16 ;;; You should have received a copy of the GNU General Public License
  17 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 (define-module (gnu packages pkg-config)
  20   #:use-module (guix licenses)
  21   #:use-module (guix packages)
  22   #:use-module (guix download)
  23   #:use-module (guix build-system gnu)
  24   #:use-module (guix build-system trivial)
  25   #:export (pkg-config))
  26
  27 ;; This is the "primitive" pkg-config package.  People should use `pkg-config'
  28 ;; (see below) rather than `%pkg-config', but we export `%pkg-config' so that
  29 ;; `fold-packages' finds it.
  30 (define-public %pkg-config
  31   (package
  32    (name "pkg-config")
  33    (version "0.27.1")
  34    (source (origin
  35             (method url-fetch)
  36             (uri (string-append
  37                   "http://pkgconfig.freedesktop.org/releases/pkg-config-"
  38                   version ".tar.gz"))
  39             (sha256
  40              (base32
  41               "05wc5nwkqz7saj2v33ydmz1y6jdg659dll4jjh91n41m63gx0qsg"))))
  42    (build-system gnu-build-system)
  43    (arguments `(#:configure-flags '("--with-internal-glib")))
  44    (native-search-paths
  45     (list (search-path-specification
  46            (variable "PKG_CONFIG_PATH")
  47            (directories '("lib/pkgconfig" "lib64/pkgconfig"
  48                           "share/pkgconfig")))))
  49    (home-page "http://www.freedesktop.org/wiki/Software/pkg-config")
  50    (license gpl2+)
  51    (synopsis "a helper tool used when compiling applications and
  52 libraries")
  53    (description
  54     "pkg-config is a helper tool used when compiling applications and
  55 libraries.  It helps you insert the correct compiler options on the
  56 command line so an application can use gcc -o test test.c `pkg-config
  57 --libs --cflags glib-2.0` for instance, rather than hard-coding values
  58 on where to find glib (or other libraries). It is language-agnostic, so
  59 it can be used for defining the location of documentation tools, for
  60 instance.")))
  61
  62 (define (cross-pkg-config target)
  63   "Return a pkg-config for TARGET, essentially just a wrapper called
  64 `TARGET-pkg-config', as `configure' scripts like it."
  65   ;; See <http://www.flameeyes.eu/autotools-mythbuster/pkgconfig/cross-compiling.html>
  66   ;; for details.
  67   (package (inherit %pkg-config)
  68     (name (string-append (package-name %pkg-config) "-" target))
  69     (build-system trivial-build-system)
  70     (arguments
  71      `(#:modules ((guix build utils))
  72        #:builder (begin
  73                    (use-modules (guix build utils))
  74
  75                    (let* ((out  (assoc-ref %outputs "out"))
  76                           (bin  (string-append out "/bin"))
  77                           (prog (string-append ,target "-pkg-config"))
  78                           (native
  79                            (string-append
  80                             (assoc-ref %build-inputs "pkg-config")
  81                             "/bin/pkg-config")))
  82
  83                      (mkdir-p bin)
  84
  85                      ;; Create a `TARGET-pkg-config' -> `pkg-config' symlink.
  86                      ;; This satisfies the pkg.m4 macros, which use
  87                      ;; AC_PROG_TOOL to determine the `pkg-config' program
  88                      ;; name.
  89                      (symlink native (string-append bin "/" prog))))))
  90     (native-inputs `(("pkg-config" ,%pkg-config)))
  91
  92     ;; Ignore native inputs, and set `PKG_CONFIG_PATH' for target inputs.
  93     (native-search-paths '())
  94     (search-paths (package-native-search-paths %pkg-config))))
  95
  96 (define (pkg-config-for-target target)
  97   "Return a pkg-config package for TARGET, which may be either #f for a native
  98 build, or a GNU triplet."
  99   (if target
 100       (cross-pkg-config target)
 101       %pkg-config))
 102
 103 ;; This hack allows us to automatically choose the native or the cross
 104 ;; `pkg-config' depending on whether it's being used in a cross-build
 105 ;; environment or not.
 106 (define-syntax pkg-config
 107   (identifier-syntax (pkg-config-for-target (%current-target-system))))