cmake: disallow '#include "SDL.h"'

CMakeLists.txt

@@ -3218,7 +3218,6 @@ target_include_directories(SDL3_Headers
   INTERFACE
     "$<BUILD_INTERFACE:${SDL3_BINARY_DIR}/include>"
     "$<BUILD_INTERFACE:${SDL3_SOURCE_DIR}/include>"
-    "$<BUILD_INTERFACE:${SDL3_SOURCE_DIR}/include/SDL3>"
 )
 if(SDL_FRAMEWORK)
   target_include_directories(SDL3_Headers
@@ -3234,7 +3233,6 @@ else()
   target_include_directories(SDL3_Headers
     INTERFACE
       "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
-      "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/SDL3>"
   )
 endif()
 

cmake/test/CMakeLists.txt

@@ -41,8 +41,6 @@ add_feature_info("TEST_FULL" TEST_FULL "Build full SDL testsuite")
 find_package(SDL3 REQUIRED CONFIG COMPONENTS Headers)
 add_library(headers_test_slash OBJECT inc_sdl_slash.c)
 target_link_libraries(headers_test_slash PRIVATE SDL3::Headers)
-add_library(headers_test_noslash OBJECT inc_sdl_noslash.c)
-target_link_libraries(headers_test_noslash PRIVATE SDL3::Headers)
 
 if(TEST_SHARED)
     find_package(SDL3 REQUIRED CONFIG COMPONENTS SDL3-shared)

cmake/test/inc_sdl_noslash.c

@@ -1,8 +0,0 @@
-#include "SDL.h"
-#include "SDL_main.h"
-
-void inc_sdl_noslash(void) {
-    SDL_SetMainReady();
-    SDL_Init(0);
-    SDL_Quit();
-}