Fix macOS builds being broken (#489)

also add .DS_Store to .gitignore

.gitignore

@@ -78,3 +78,6 @@ sm64config.txt
 !/sound/**/*custom*/**/*.aiff
 !/assets/**/*custom*.bin
 !/assets/**/*custom*/**/*.bin
+
+# macOS bullcrap directory settings file thats autocreated
+.DS_Store

Makefile

@@ -532,7 +532,12 @@ else ifeq ($(SDL1_USED),1)
 endif
 
 ifneq ($(SDL1_USED)$(SDL2_USED),00)
-  BACKEND_CFLAGS += `$(SDLCONFIG) --cflags`
+  ifeq ($(OSX_BUILD),1)
+    MAC_PREFIX := `$(SDLCONFIG) --prefix`
+    BACKEND_CFLAGS +=-I$(MAC_PREFIX)/include `$(SDLCONFIG) --cflags` # macOS homebrew SDL2 has the config laid out differently so this makes it point to the correct folder + a failsafe for if it ever changes for some reason in the future.
+  else
+    BACKEND_CFLAGS += `$(SDLCONFIG) --cflags`
+  endif
   ifeq ($(WINDOWS_BUILD),1)
     BACKEND_LDFLAGS += `$(SDLCONFIG) --static-libs` -lsetupapi -luser32 -limm32 -lole32 -loleaut32 -lshell32 -lwinmm -lversion
   else

tools/aiff_extract_codebook.c

@@ -26,6 +26,11 @@ typedef unsigned int u32;
 #define NORETURN __attribute__((noreturn))
 #define UNUSED __attribute__((unused))
 
+#ifdef __APPLE__
+// even with -std=gnu99 vsnprintf seems to not be defined in stdio.h, why?
+extern int vsnprintf(char * __restrict, size_t, const char * __restrict, va_list);
+#endif
+
 typedef struct
 {
     u32 start;