From b7230e67df46c1ec73d7b9b782249a8382450d24 Mon Sep 17 00:00:00 2001
From: Simon Hollingshead <me@simonhollingshead.com>
Date: Sat, 24 Feb 2024 22:00:33 +0000
Subject: [PATCH] s2geometry: Build with C++14 instead of C++11.

This fixes a breakage caused by a gtest version bump.
---
 pkgs/development/libraries/s2geometry/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/s2geometry/default.nix b/pkgs/development/libraries/s2geometry/default.nix
index afd5ffa0a0a2..a8893b698a48 100644
--- a/pkgs/development/libraries/s2geometry/default.nix
+++ b/pkgs/development/libraries/s2geometry/default.nix
@@ -22,6 +22,12 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ openssl gtest ];
 
+  # Default of C++11 is too low for gtest.
+  # In newer versions of s2geometry this can be done with cmakeFlags.
+  postPatch = ''
+    substituteInPlace CMakeLists.txt --replace "CMAKE_CXX_STANDARD 11" "CMAKE_CXX_STANDARD 14"
+  '';
+
   meta = with lib; {
     description = "Computational geometry and spatial indexing on the sphere";
     homepage = "http://s2geometry.io/";