From 0b1af54c553aa63bee0e096bcef2b71a85d11164 Mon Sep 17 00:00:00 2001
From: Sascha Brawer <sascha@brawer.ch>
Date: Wed, 23 Jul 2025 11:59:13 +0200
Subject: [PATCH] Build with C++23

The current version of the S2 geometry library does not support
building with C++14 anymore.
---
 CMakeLists.txt | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84b926f..8ec7c82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.5)
+cmake_minimum_required(VERSION 3.20)
 set(CMAKE_C_COMPILER "/usr/bin/clang")
 set(CMAKE_CXX_COMPILER "/usr/bin/clang++")
 project(OSMExpress)
@@ -7,6 +7,7 @@ set(CMAKE_CXX_FLAGS_DEBUG "-DDEBUG -g")
 set(CMAKE_CXX_FLAGS "-Wno-deprecated")
 set(CMAKE_CXX_FLAGS "-Wno-deprecated-declarations")
 set(CMAKE_CXX_FLAGS "-pthread")
+set(CMAKE_CXX_STANDARD 23)
 set(OSMX_VERSION "0.2.0")
 set(BUILD_SHARED_LIBS OFF CACHE INTERNAL "")
 set(ROARING_BUILD_STATIC ON CACHE INTERNAL "")
@@ -134,12 +135,8 @@ target_link_libraries(
     osmx
     bz2 CapnProto::capnp cxxopts::cxxopts expat LMDB::LMDB roaring s2 z)
 
-set_property(TARGET osmx PROPERTY CXX_STANDARD 14)
-
 add_executable(osmxTest test/test_region.cpp src/region.cpp)
 
-set_property(TARGET osmxTest PROPERTY CXX_STANDARD 14)
-
 target_include_directories(
     osmxTest
     PUBLIC include ${CAPNPC_OUTPUT_DIR}/include)
@@ -165,8 +162,6 @@ add_library(
     src/update.cpp
     src/region.cpp)
 
-set_property(TARGET osmx-static PROPERTY CXX_STANDARD 14)
-
 target_include_directories(
     osmx-static
     PUBLIC include ${CAPNPC_OUTPUT_DIR}/include)