GNU bug report logs - #49025
[PATCH core-updates 00/37] Support cross-compilation with meson

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From: Maxime Devos <maximedevos <at> telenet.be>
To: 49025 <at> debbugs.gnu.org
Cc: othacehe <at> gnu.org, Maxime Devos <maximedevos <at> telenet.be>
Subject: [bug#49025] [PATCH v3 core-updates 14/37] wrap-python3: Fix cross-compilation.
Date: Fri, 18 Jun 2021 19:16:08 +0200

When cross-compiling, "bash" is missing from %build-inputs,
leading to a build error. Use this-package-input instead of
%build-inputs to resolve this. While we're at it, eliminate
all uses of %outputs and %build-inputs.

* gnu/packages/python.scm
  (wrap-python3)[arguments]<#:builder>: Eliminte %outputs
  and %build-inputs.
---
 gnu/packages/python.scm | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 9628836567..fbad0b65b8 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -60,6 +60,7 @@
 ;;; Copyright © 2019 Tanguy Le Carrour <tanguy <at> bioneland.org>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke <at> gnu.org>
 ;;; Copyright © 2020, 2021 Greg Hogan <code <at> greghogan.com>
+;;; Copyright © 2021 Maxime Devos <maximedevos <at> telenet.be>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -575,8 +576,8 @@ for more information.")))
        #:builder
        ,#~(begin
             (use-modules (guix build utils))
-            (let ((bin (string-append (assoc-ref %outputs "out") "/bin"))
-                  (python (string-append (assoc-ref %build-inputs "python") "/bin/")))
+            (let ((bin (string-append #$output "/bin"))
+                  (python #$(file-append (this-package-input "python") "/bin/")))
               (mkdir-p bin)
               (for-each
                (lambda (old new)
@@ -586,8 +587,7 @@ for more information.")))
                `("python"  ,"pydoc"  ,"idle"  ,"pip"))
               ;; python-config outputs search paths based upon its location,
               ;; use a bash wrapper to avoid changing its outputs.
-              (let ((bash (string-append (assoc-ref %build-inputs "bash")
-                                         "/bin/bash"))
+              (let ((bash #$(file-append (this-package-input "bash") "/bin/bash"))
                     (old  (string-append python "python3-config"))
                     (new  (string-append bin "/python-config")))
                 (with-output-to-file new
-- 
2.32.0

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