Stop bullet from spamming our CMake runs with warnings

extern/CMakeLists.txt

@@ -1,9 +1,12 @@
 set(CMAKE_FOLDER "External")
+include(FetchContent)
 
 FetchContent_Declare(
         bullet
         GIT_REPOSITORY https://github.com/bulletphysics/bullet3.git
         GIT_TAG 2.89
+        CMAKE_ARGS "-Wno-dev"
+        PATCH_COMMAND git apply --ignore-space-change --ignore-whitespace ${CMAKE_CURRENT_SOURCE_DIR}/fix_bullet_cmake_version.patch
 )
 
 FetchContent_Declare(
@@ -47,6 +50,7 @@ set(USE_MSVC_RUNTIME_LIBRARY_DLL ON CACHE BOOL "" FORCE)
 set(ENABLE_GLSLANG_INSTALL OFF CACHE BOOL "" FORCE)
 set(ENABLE_CTEST OFF CACHE BOOL "" FORCE)
 
+set(CMAKE_PROJECT_BULLET_PHYSICS_INCLUDE_BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/fix_bad_cmake_dev.cmake)
 FetchContent_MakeAvailable(bullet)
 FetchContent_MakeAvailable(spirv-cross)
 FetchContent_MakeAvailable(glslang)
@@ -60,8 +64,6 @@ add_subdirectory(magic_enum)
 add_subdirectory(smaa)
 add_subdirectory(doctest)
 
-include(FetchContent)
-
 FetchContent_Declare(json
         GIT_REPOSITORY https://github.com/ArthurSonzogni/nlohmann_json_cmake_fetchcontent.git
         GIT_TAG v3.9.1)

extern/fix_bad_cmake_dev.cmake

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 3.0)
+cmake_policy(SET CMP0115 OLD)
+cmake_policy(SET CMP0072 NEW)

extern/fix_bullet_cmake_version.patch

@@ -0,0 +1,10 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 68e0a93bc..5b83fb1cd 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 2.4.3)
++cmake_minimum_required(VERSION 2.8.12)
+ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
+ cmake_policy(SET CMP0017 NEW)
+ #this line has to appear before 'PROJECT' in order to be able to disable incremental linking