From a59e2dd8cd16655e379abb567baf978c94f3d48e Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Wed, 27 Nov 2019 19:09:58 +0100
Subject: [PATCH] gnu: qtbase: Use absolute references in .prl files.

This fixes <https://bugs.gnu.org/38405>.

* gnu/packages/qt.scm (qtbase)[arguments]: Add phase 'patch-prl-files'.
---
 gnu/packages/qt.scm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gnu/packages/qt.scm b/gnu/packages/qt.scm
index 5f4f29a948..2cc44ab831 100644
--- a/gnu/packages/qt.scm
+++ b/gnu/packages/qt.scm
@@ -509,6 +509,16 @@ (define-public qtbase
                  (("\\$\\$\\[QT_HOST_DATA/get\\]") archdata)
                  (("\\$\\$\\[QT_HOST_DATA/src\\]") archdata))
                #t)))
+         (add-after 'patch-mkspecs 'patch-prl-files
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out")))
+               ;; Insert absolute references to the qtbase libraries because
+               ;; QT_INSTALL_LIBS does not always resolve correctly, depending
+               ;; on context.  See <https://bugs.gnu.org/38405>
+               (substitute* (find-files (string-append out "/lib") "\\.prl$")
+                 (("\\$\\$\\[QT_INSTALL_LIBS\\]")
+                  (string-append out "/lib")))
+               #t)))
          (add-after 'unpack 'patch-paths
            ;; Use the absolute paths for dynamically loaded libs, otherwise
            ;; the lib will be searched in LD_LIBRARY_PATH which typically is