File Use-Exiv2-0.27-if-available.patch of Package kphotoalbum

From 41c7da0531c8a1eb7046345c2b991e7a5d1e6657 Mon Sep 17 00:00:00 2001
From: Johannes Zarl-Zierl <johannes@zarl-zierl.at>
Date: Sun, 30 Dec 2018 23:36:24 +0100
Subject: Use Exiv2 0.27 if available.

Beginning with version 0.27, Exiv2 ships with cmake package config
files.
---
 CMakeLists.txt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3012f7a..5dcc29c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,7 +44,17 @@ if(JPEG_FOUND)
     include_directories(${JPEG_INCLUDE_DIR})
 endif()
 
-find_package(Exiv2 REQUIRED)
+### 2018-12-30 jzarl
+# When Exiv2 0.26 can be deprecated, FindExiv2.cmake should be removed
+# and only find_package(exiv2) should be used
+find_package(exiv2 CONFIG QUIET)
+if(exiv2_FOUND)
+    # search againg with REQUIRED, so that the feature summary correctly shows exiv as required dependency
+    find_package(exiv2 CONFIG REQUIRED)
+    set(EXIV2_LIBRARIES exiv2lib)
+else()
+    find_package(Exiv2 REQUIRED)
+endif()
 
 find_package(KF5Kipi 5.1.0)
 set_package_properties(KF5Kipi
-- 
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