Use SDL logging functions in ERROR/WARNING/NOTICE

They choose appropriate destination depending on the platform.

src/CMakeLists.txt

@@ -13,13 +13,12 @@ add_subdirectory(../deps/fmgen fmgen)
 
 if (ANDROID)
   add_library(system3 SHARED)
-  find_library(ndk_log log)
 
   target_sources(system3 PRIVATE
     android/nact_android.cpp
     android/mako.cpp
     )
-  target_link_libraries(system3 PRIVATE SDL2 SDL2_ttf fmgen ${ndk_log})
+  target_link_libraries(system3 PRIVATE SDL2 SDL2_ttf fmgen)
 
 elseif (EMSCRIPTEN)
   add_executable(system3)

src/common.h

@@ -12,10 +12,6 @@
 #include <limits.h>
 #include <stdio.h>
 
-#ifdef __ANDROID__
-#include <android/log.h>
-#endif
-
 #ifdef EMSCRIPTEN
 #include <emscripten.h>
 #define SDL_Delay emscripten_sleep
@@ -31,25 +27,11 @@ typedef int8_t int8;
 typedef int16_t int16;
 typedef int32_t int32;
 
-#ifdef __ANDROID__
-
 #define ERROR(fmt, ...) \
-	__android_log_print(ANDROID_LOG_ERROR, "System3", "(%s:%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
+	SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
 #define WARNING(fmt, ...) \
-	__android_log_print(ANDROID_LOG_WARN, "System3", "(%s:%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
-#define NOTICE(fmt, ...) \
-	__android_log_print(ANDROID_LOG_INFO, "System3", fmt, ##__VA_ARGS__)
-
-#else // __ANDROID__
-
-#define ERROR(fmt, ...) \
-	fprintf(stderr, "*ERROR*(%s:%d): " fmt "\n", __func__, __LINE__, ##__VA_ARGS__)
-#define WARNING(fmt, ...) \
-	fprintf(stderr, "*WARNING*(%s:%d): " fmt "\n", __func__, __LINE__, ##__VA_ARGS__)
-#define NOTICE(fmt, ...) \
-	fprintf(stderr, fmt "\n", ##__VA_ARGS__)
-
-#endif // __ANDROID__
+	SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
+#define NOTICE SDL_Log
 
 #ifndef WIN32