fix font_loader.h

src/app/core/platform/font_loader.h

@@ -2,8 +2,6 @@
 #ifndef FONTLOADER_H
 #define FONTLOADER_H
 
-#include "TargetConditionals.h"
-
 #ifdef _WIN32
 #include <Windows.h>
 // Windows specific function declaration for loading system fonts into ImGui
@@ -11,16 +9,22 @@ int CALLBACK EnumFontFamExProc(const LOGFONT* lpelfe, const TEXTMETRIC* lpntme,
                                DWORD FontType, LPARAM lParam);
 #elif __APPLE__
 
-#ifdef TARGET_OS_MAC
+#include "TargetConditionals.h"
+
+#if TARGET_OS_MAC == 1
 
 void LoadSystemFonts();
 
-#elif TARGET_OS_IPHONE
+#elif TARGET_OS_IPHONE == 1
 
 void LoadSystemFonts();
 
 #endif
 
+#elif __linux__
+
+// TODO: Implement Linux specific function declaration for loading system fonts
+
 #endif
 
 #endif  // FONTLOADER_H