build: Set cmake_minimum_required to version 3.30 (#7709)

* build: Set cmake_minimum_required to version 3.30

* Nix: add patch for CMake min ver

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.27)
+cmake_minimum_required(VERSION 3.30)
 
 # Get version
 file(READ "${CMAKE_SOURCE_DIR}/VERSION" VER_RAW)

nix/cmake-version.patch

@@ -0,0 +1,10 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 6fdf98db..d8424d91 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 3.30)
++cmake_minimum_required(VERSION 3.27)
+
+ # Get version
+ file(READ "${CMAKE_SOURCE_DIR}/VERSION" VER_RAW)

nix/default.nix

@@ -64,6 +64,8 @@ assert lib.assertMsg (!hidpiXWayland) "The option `hidpiXWayland` has been remov
     patches = [
       # forces GCC to use -std=c++26
       ./stdcxx.patch
+      # Nix does not have CMake 3.30 yet, so override the minimum version
+      ./cmake-version.patch
     ];
 
     postPatch = ''