[bug#56557] [PATCH] k3b: Fix build

[Thomas Danckaert]

Hi reviewers,

k3b doesn't build anymore on current master due to a mix-up of CMake 
variables.  This patch fixes that.

It's probably a temporary issue because latest versions of k3b have 
updated CMakeLists, but updating to a newer k3b also requires 
updating all KDE Frameworks to version 5.88.  So I hope we can 
include the present fix for now.

It's been a while, hope this patch satisfies the requirements :-)

Sincerely,

Thomas

>From 7adc6413918b633c9879d08a8fce531d67416f85 Mon Sep 17 00:00:00 2001
From: Thomas Danckaert <thomas.danckaert@gmail.com>
Date: Thu, 14 Jul 2022 14:21:17 +0200
Subject: [PATCH 1/2] gnu: k3b: Fix build.

* gnu/packages/kde-multimedia.scm (k3b)[phases]: Add phase fix-cmake-taglib in
order to use correct Taglib include and library variables.
---
 gnu/packages/kde-multimedia.scm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gnu/packages/kde-multimedia.scm b/gnu/packages/kde-multimedia.scm
index 752f6b499c..bdbf325f15 100644
--- a/gnu/packages/kde-multimedia.scm
+++ b/gnu/packages/kde-multimedia.scm
@@ -373,6 +373,16 @@ (define-public k3b
                  (("\"(dvdcss)\"" _ library)
                   (string-append "\"" libdvdcss "/lib/" library "\""))))
              #t))
+         (add-before 'configure 'fix-cmake-taglib
+           (lambda _
+             ;; Use the CMake variables provided by FindTaglib from
+             ;; extra-cmake-modules, instead of bundled FindTaglib.cmake:
+             (substitute*
+                 '("plugins/decoder/mp3/CMakeLists.txt"
+                   "plugins/decoder/flac/CMakeLists.txt"
+                   "plugins/project/audiometainforenamer/CMakeLists.txt")
+               (("TAGLIB_INCLUDES") "Taglib_INCLUDE_DIRS")
+               (("TAGLIB_LIBRARIES") "Taglib_LIBRARIES"))))
          (add-after 'qt-wrap 'wrap-path
            (lambda* (#:key inputs outputs #:allow-other-keys)
              ;; Set paths to backend programs.
-- 
2.36.1