make define.h generate again, it looks like policy of custom command had to change and it's no more dependency of Nabla - create proxy target and fix it. Force Nabla to use CMake 3.26

Author: AnastaZIuk

CMakeLists.txt

@@ -2,7 +2,7 @@
 # This file is part of the "Nabla Engine".
 # For conditions of distribution and use, see copyright notice in nabla.h.in or nabla.h
 
-cmake_minimum_required(VERSION 3.25)
+cmake_minimum_required(VERSION 3.26)
 #policies
 cmake_policy(SET CMP0112 NEW)
 

src/nbl/CMakeLists.txt

@@ -637,6 +637,13 @@ if(NOT NBL_STATIC_BUILD)
 		COMMENT "Launching defines.h generation script!"
 		VERBATIM
 	)
+	
+	add_custom_target(generate_nabla_defines ALL
+        DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/generated/define.h"
+        VERBATIM
+    )
+	
+	add_dependencies(Nabla generate_nabla_defines)
 endif()
 
 nbl_install_headers("${NABLA_HEADERS_PUBLIC}" "${NBL_ROOT_PATH}/include")