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name: gnu/packages/pkg-config.scm 	 # note: path name is non-authoritative(*)

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;; Copyright © 2022 ( <paren@disroot.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 build-system trivial)
  #:use-module (guix build-system gnu)
  #:use-module (guix download)
  #:use-module (guix gexp)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix memoization)
  #:use-module (guix packages)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages check)
  #: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 "0.29.2")
   (source (origin
            (method url-fetch)
            (uri (list
                  (string-append
                   "http://fossies.org/linux/misc/pkg-config-" version
                   ".tar.gz")

                  ;; FIXME: The following URL redirects to HTTPS, which
                  ;; creates bootstrapping problems:
                  ;; <http://bugs.gnu.org/22774>.
                  (string-append
                   "http://pkgconfig.freedesktop.org/releases/pkg-config-"
                   version ".tar.gz")))
            (sha256
             (base32
              "14fmwzki1rlz8bs2p810lk6jqdxsk966d8drgsjmi54cd00rrikg"))))
   (build-system gnu-build-system)
   (arguments
    `(#:configure-flags
      '("--with-internal-glib"
        ;; Those variables are guessed incorrectly when cross-compiling.
        ;; See: https://developer.gimp.org/api/2.0/glib/glib-cross-compiling.html.
        ,@(if (%current-target-system)
              '("glib_cv_stack_grows=no"
                "glib_cv_uscore=no"
                "ac_cv_func_posix_getpwuid_r=yes"
                "ac_cv_func_posix_getgrgid_r=yes")
              '()))))
   (native-search-paths
    (list (search-path-specification
           (variable "PKG_CONFIG_PATH")
           (files '("lib/pkgconfig" "lib64/pkgconfig" "share/pkgconfig")))))
   (home-page "https://www.freedesktop.org/wiki/Software/pkg-config")
   (license 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
  (mlambda (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"))
                       #t))))
      (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))))

;; This hack allows for using both "pkg-config" and "TARGET-pkg-config"
;; at the same time.  Simply using '%pkg-config' and 'pkg-config' won't
;; work because they both use the "PKG_CONFIG_PATH" environment variable.
(define-public pkg-config-for-build
  (package
    (inherit (hidden-package %pkg-config))
    (name "pkg-config-for-build")
    (version "0")
    (source #f)
    (build-system trivial-build-system)
    (inputs
     (list bash-minimal %pkg-config))
    (arguments
     `(#:modules ((guix build utils))
       #:builder
       ,#~(begin
            (use-modules (guix build utils))
            (define where (string-append #$output "/bin/pkg-config"))
            (mkdir-p (dirname where))
            (call-with-output-file where
              (lambda (port)
                (format port "#!~a
export PKG_CONFIG_PATH=\"$PKG_CONFIG_PATH_FOR_BUILD\"
exec ~a \"$@\""
                        (search-input-file %build-inputs "bin/bash")
                        (search-input-file %build-inputs "bin/pkg-config"))))
            (chmod where #o500))))
    (native-search-paths
     (map (lambda (original)
            (search-path-specification
             (inherit original)
             (variable "PKG_CONFIG_PATH_FOR_BUILD")))
          (package-native-search-paths %pkg-config)))))

(define-public pkgconf
  ;; The last release was tagged on 2021-07-25, and there's been a lot of activity
  ;; since then.
  (let ((commit "b0802cb3d19b5b963ad20eed464a2da6e7d7b0b5")
        (revision "0"))
    (package
     (name "pkgconf")
     (version (git-version "1.8.0" revision commit))
     (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/pkgconf/pkgconf")
                    (commit commit)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1xcpvzahrp34jhdfsazdhbj9byr2wqwmjx7jfarhpc1x4z3l37a0"))))
     (build-system gnu-build-system)
     (arguments
      (list #:phases
            #~(modify-phases %standard-phases
                (delete 'check)
                (add-after 'install 'set-home
                  ;; Kyua tries to access $HOME.
                  (lambda _
                    (setenv "HOME" (getcwd))))
                (add-after 'set-home 'check
                  ;; Kyua won't work unless we move 'check to after 'install.
                  (assoc-ref %standard-phases 'check)))))
     (native-inputs (list atf
                          ;; pkgconf's autotools setup forbids the use of any
                          ;; earlier version of autoconf than 2.71.
                          autoconf-2.71
                          automake
                          kyua
                          libtool))
     (native-search-paths (package-native-search-paths %pkg-config))
     (home-page "https://pkgconf.org")
     (synopsis "Package compiler and linker metadata toolkit")
     (description "@code{pkgconf} is a compiler and linker configuration toolkit,
mostly compatible with freedesktop.org's @code{pkg-config}.  A library called
@code{libpkgconf} is provided so that programs can embed its functionality.")
     (license license:isc))))

debug log:

solving a22aa6969b ...
found a22aa6969b in https://yhetil.org/guix/20220628203426.31906-6-paren@disroot.org/
found dcd6ba3353 in https://yhetil.org/guix/20220628203426.31906-5-paren@disroot.org/ ||
	https://yhetil.org/guix/20220628180831.9792-2-paren@disroot.org/
found 1526d6f6e0 in https://yhetil.org/guix/20220628180831.9792-1-paren@disroot.org/ ||
	https://yhetil.org/guix/20220628203426.31906-4-paren@disroot.org/
found 770426d779 in https://git.savannah.gnu.org/cgit/guix.git
preparing index
index prepared:
100644 770426d779345b0006ee1989c53d79f6e409447a	gnu/packages/pkg-config.scm

applying [1/3] https://yhetil.org/guix/20220628180831.9792-1-paren@disroot.org/
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index 770426d779..1526d6f6e0 100644

Checking patch gnu/packages/pkg-config.scm...
Applied patch gnu/packages/pkg-config.scm cleanly.

skipping https://yhetil.org/guix/20220628203426.31906-4-paren@disroot.org/ for 1526d6f6e0
index at:
100644 1526d6f6e066c851e05b369d03c936c13305bc51	gnu/packages/pkg-config.scm

applying [2/3] https://yhetil.org/guix/20220628203426.31906-5-paren@disroot.org/
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index 1526d6f6e0..dcd6ba3353 100644

Checking patch gnu/packages/pkg-config.scm...
Applied patch gnu/packages/pkg-config.scm cleanly.

skipping https://yhetil.org/guix/20220628180831.9792-2-paren@disroot.org/ for dcd6ba3353
index at:
100644 dcd6ba335325b012e966873e0da26f62312df7fa	gnu/packages/pkg-config.scm

applying [3/3] https://yhetil.org/guix/20220628203426.31906-6-paren@disroot.org/
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index dcd6ba3353..a22aa6969b 100644

Checking patch gnu/packages/pkg-config.scm...
Applied patch gnu/packages/pkg-config.scm cleanly.

index at:
100644 a22aa6969be355996002ecac0589862ba82dca24	gnu/packages/pkg-config.scm

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