TODO: fix all ports which require this and remove this patch
--- sdl2-config.in.orig	2024-04-14 09:17:31 UTC
+++ sdl2-config.in
@@ -46,7 +46,7 @@ while test $# -gt 0; do
       echo @SDL_VERSION@
       ;;
     --cflags)
-      echo -I@includedir@/SDL2 @SDL_CFLAGS@
+      echo -I@includedir@ -I@includedir@/SDL2 @SDL_CFLAGS@
       ;;
 @ENABLE_SHARED_TRUE@    --libs)
 @ENABLE_SHARED_TRUE@      echo -L@libdir@ @SDL_RLD_FLAGS@ @SDL_LIBS@