depot/third_party/nixpkgs/pkgs/development/libraries/SDL2/find-headers.patch

diff --git a/sdl2-config.cmake.in b/sdl2-config.cmake.in
index db864aab9..b94e16043 100644
--- a/sdl2-config.cmake.in
+++ b/sdl2-config.cmake.in
@@ -26,7 +26,9 @@ set_and_check(SDL2_EXEC_PREFIX    "${exec_prefix}")
 set_and_check(SDL2_BINDIR         "${bindir}")
 set_and_check(SDL2_INCLUDE_DIR    "${includedir}/SDL2")
 set_and_check(SDL2_LIBDIR         "${libdir}")
-set(SDL2_INCLUDE_DIRS             "${includedir};${SDL2_INCLUDE_DIR}")
+
+set(SDL2_INCLUDE_DIRS "${includedir};${SDL2_INCLUDE_DIR}" $ENV{SDL2_PATH})
+separate_arguments(SDL2_INCLUDE_DIRS)
 
 set(SDL2_LIBRARIES SDL2::SDL2)
 set(SDL2_STATIC_LIBRARIES SDL2::SDL2-static)
diff --git a/sdl2-config.in b/sdl2-config.in
index f6eca7668..c0cd94590 100644
--- a/sdl2-config.in
+++ b/sdl2-config.in
@@ -46,7 +46,11 @@ while test $# -gt 0; do
       echo @SDL_VERSION@
       ;;
     --cflags)
-      echo -I@includedir@/SDL2 @SDL_CFLAGS@
+      SDL_CFLAGS=""
+      for i in @includedir@/SDL2 $SDL2_PATH; do
+        SDL_CFLAGS="$SDL_CFLAGS -I$i"
+      done
+      echo $SDL_CFLAGS @SDL_CFLAGS@
       ;;
 @ENABLE_SHARED_TRUE@    --libs)
 @ENABLE_SHARED_TRUE@      echo -L@libdir@ @SDL_RLD_FLAGS@ @SDL_LIBS@