14/22: gnu: python: Build fix for the Hurd.

[guix-commits]

janneke pushed a commit to branch wip-hurd-vm
in repository guix.

commit 3e32e0bd93f21a725b460f2cbc8de8b92f6e5971
Author: Jan (janneke) Nieuwenhuizen <address@hidden>
AuthorDate: Mon Apr 13 07:47:38 2020 +0200

    gnu: python: Build fix for the Hurd.
    
    Unlike during a non-chroot'ed build on Debian/Hurd, there is no 
/usr/include.
    
    * gnu/packages/python.scm (python-2.7)[arguments]: Add `fix-regen'
    stage to correct a reference to "/usr".
---
 gnu/packages/python.scm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index f0a6193..4ae4f8e 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -58,6 +58,7 @@
 ;;; Copyright © 2018 Luther Thompson <address@hidden>
 ;;; Copyright © 2018 Vagrant Cascadian <address@hidden>
 ;;; Copyright © 2019 Tanguy Le Carrour <address@hidden>
+;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <address@hidden>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -81,6 +82,7 @@
   #:use-module (gnu packages bash)
   #:use-module (gnu packages compression)
   #:use-module (gnu packages dbm)
+  #:use-module (gnu packages hurd)
   #:use-module (gnu packages libffi)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages readline)
@@ -197,6 +199,14 @@
                                     "Lib/test/test_subprocess.py"))
                (("/bin/sh") (which "sh")))
              #t))
+          ,@(if (hurd-system?)
+                `((add-before 'build 'patch-regen-for-hurd
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (let ((libc (assoc-ref inputs "libc")))
+                        (substitute* "Lib/plat-generic/regen"
+                          (("/usr/include/") (string-append libc "/include/")))
+                        #t))))
+                '())
           (add-before 'configure 'do-not-record-configure-flags
             (lambda* (#:key configure-flags #:allow-other-keys)
               ;; Remove configure flags from the installed '_sysconfigdata.py'