add 'included' defines to all sokol headers for better error messages when included are missing

1 files changed, 2 insertions, 0 deletions

diff --git a/sokol_app.h b/sokol_app.h
index 4ee51f52..9d0c1e74 100644
--- a/sokol_app.h
+++ b/sokol_app.h
@@ -382,6 +382,7 @@
         3. This notice may not be removed or altered from any source
         distribution.
 */
+#define SOKOL_APP_INCLUDED (1)
 #include <stdint.h>
 #include <stdbool.h>
 
@@ -659,6 +660,7 @@ SOKOL_API_DECL int sapp_run(const sapp_desc* desc);
 
 /*-- IMPLEMENTATION ----------------------------------------------------------*/
 #ifdef SOKOL_IMPL
+#define SOKOL_APP_IMPL_INCLUDED (1)
 
 #ifdef _MSC_VER
 #pragma warning(push)