Properly report DX headers in the CMake project files (thanks, "MailMr_S"!). Fixes Bugzilla #2900.
diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index 8d19245..5a56a96 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -47,6 +47,13 @@
#cmakedefine HAVE_GCC_ATOMICS @HAVE_GCC_ATOMICS@
#cmakedefine HAVE_GCC_SYNC_LOCK_TEST_AND_SET @HAVE_GCC_SYNC_LOCK_TEST_AND_SET@
+#cmakedefine HAVE_D3D_H @HAVE_D3D_H@
+#cmakedefine HAVE_D3D11_H @HAVE_D3D11_H@
+#cmakedefine HAVE_DDRAW_H @HAVE_DDRAW_H@
+#cmakedefine HAVE_DSOUND_H @HAVE_DSOUND_H@
+#cmakedefine HAVE_DINPUT_H @HAVE_DINPUT_H@
+#cmakedefine HAVE_XAUDIO2_H @HAVE_XAUDIO2_H@
+#cmakedefine HAVE_XINPUT_H @HAVE_XINPUT_H@
#cmakedefine HAVE_DXGI_H @HAVE_DXGI_H@
/* Comment this if you want to build without any C library requirements */