cmake: build tests against installed SDL prefix

test/CMakeLists.txt

@@ -2,7 +2,12 @@
 # CMake script for building the SDL tests
 #
 
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../cmake")
+
+include(CheckIncludeFile)
 include(CheckStructHasMember)
+include(CMakePushCheckState)
+include(sdlcompilers)
 
 if(SDL_TESTS_LINK_SHARED)
     set(sdl_name_component SDL3-shared)
@@ -220,7 +225,7 @@ if(HAVE_LIBUDEV_H)
 endif()
 
 set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE)
-include("${SDL3_SOURCE_DIR}/cmake/FindFFmpeg.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/../cmake/FindFFmpeg.cmake")
 if(FFmpeg_FOUND)
     cmake_push_check_state()
     list(APPEND CMAKE_REQUIRED_INCLUDES "${FFmpeg_AVUTIL_INCLUDE_DIRS}")

test/testautomation_intrinsics.c

@@ -2,8 +2,10 @@
  * Intrinsics test suite
  */
 
+#ifndef NO_BUILD_CONFIG
 /* Disable intrinsics that are unsupported by the current compiler */
 #include <build_config/SDL_build_config.h>
+#endif
 
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_intrin.h>

test/testautomation_pen.c

@@ -19,6 +19,7 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
+#ifndef NO_BUILD_CONFIG
 #include <stddef.h>
 
 /**
@@ -1907,3 +1908,23 @@ SDLTest_TestSuiteReference penTestSuite = {
     penTests,
     NULL
 };
+
+#else
+
+#include <SDL3/SDL_test.h>
+#include "testautomation_suites.h"
+
+/* Sequence of Mouse test cases */
+static const SDLTest_TestCaseReference *penTests[] = {
+    NULL
+};
+
+/* Mouse test suite (global) */
+SDLTest_TestSuiteReference penTestSuite = {
+    "Pen",
+    NULL,
+    penTests,
+    NULL
+};
+
+#endif

test/testevdev.c

@@ -22,7 +22,9 @@
 #endif
 #define SDL_DYNAMIC_API 0
 
+#ifndef NO_BUILD_CONFIG
 #include "../src/SDL_internal.h"
+#endif
 
 #include <stdio.h>
 #include <string.h>