From: Thomas Fischer <fischer@unix-ag.uni-kl.de>
Date: Thu, 23 May 2024 17:59:51 +0000 (+0200)
Subject: [PATCH] Switch to C++17 for recent ICU4C versions
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[PATCH] Switch to C++17 for recent ICU4C versions

Starting with ICU version 75, it makes use of C++ 17 constructs, so KBibTeX no longer
compiles if C++ is still set to C++ 11.
With this change, the C++ standard is raised to C++17 if a recent ICU is detected.

Gbp-Pq: Name upstream_Switch-to-C-17-for-recent-ICU4C-versions.patch
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 901e697..4ae3d63 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -137,6 +137,10 @@ find_package(
 )
 if(ICU_FOUND)
     add_definitions(-DHAVE_ICU)
+    if(ICU_VERSION GREATER_EQUAL 75)
+        # Starting with ICU 75, it makes use of C++17 instead of C++11 before
+        set(CMAKE_CXX_STANDARD 17)
+    endif()
 endif()
 
 option(