Ports/SDL2: Do an out-of-tree build

SDL 2.24.0 starts having include loops if we try to do an in-tree build
against its wishes, so let's not do that anymore.

Ports/SDL2/package.sh

@@ -8,9 +8,17 @@ configopts=("-DCMAKE_TOOLCHAIN_FILE=${SERENITY_BUILD_DIR}/CMakeToolchain.txt" "-
 depends=("libiconv")
 
 configure() {
- run cmake "${configopts[@]}"
+ mkdir -p "${PORT_BUILD_DIR}/SDL2-${version}-build"
+ cd "${PORT_BUILD_DIR}/SDL2-${version}-build"
+ cmake "${configopts[@]}" "${PORT_BUILD_DIR}/SDL2-${version}"
+}
+
+build() {
+ cd "${PORT_BUILD_DIR}/SDL2-${version}-build"
+ make "${makeopts[@]}"
 }
 
 install() {
- run make install
+ cd "${PORT_BUILD_DIR}/SDL2-${version}-build"
+ make install
 }

Ports/SDL2/patches/0001-Add-SerenityOS-platform-support.patch

@@ -16,7 +16,7 @@ Co-Authored-By: Stephan Unverwerth <[email protected]>
 Co-Authored-By: Tim Schumacher <[email protected]>
 Co-Authored-By: circl <[email protected]>
 ---
- CMakeLists.txt | 29 +-
+ CMakeLists.txt | 25 +-
  build-scripts/config.sub | 3 +
  cmake/sdlchecks.cmake | 20 +
  include/SDL_config.h.cmake | 2 +
@@ -36,7 +36,7 @@ Co-Authored-By: circl <[email protected]>
  src/video/serenity/SDL_serenitymouse.h | 39 +
  src/video/serenity/SDL_serenityvideo.cpp | 720 ++++++++++++++++++
  src/video/serenity/SDL_serenityvideo.h | 98 +++
- 20 files changed, 1414 insertions(+), 29 deletions(-)
+ 20 files changed, 1414 insertions(+), 25 deletions(-)
  create mode 100644 src/audio/serenity/SDL_serenityaudio.cpp
  create mode 100644 src/audio/serenity/SDL_serenityaudio.h
  create mode 100644 src/video/serenity/SDL_serenityevents.cpp
@@ -49,18 +49,10 @@ Co-Authored-By: circl <[email protected]>
  create mode 100644 src/video/serenity/SDL_serenityvideo.h
 
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 644715a..2400d53 100644
+index 644715a..4cd432d 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -1,7 +1,3 @@
--if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
-- message(FATAL_ERROR "Prevented in-tree build. Please create a build directory outside of the SDL source code and run \"cmake -S ${CMAKE_SOURCE_DIR} -B .\" from there")
--endif()
--
- cmake_minimum_required(VERSION 3.0.0)
- project(SDL2 C CXX)
-
-@@ -17,6 +13,9 @@ endif()
+@@ -17,6 +17,9 @@ endif()
  # etc. See https://github.com/libsdl-org/SDL/issues/4150
  add_library(sdl-build-options INTERFACE)