n3ds: fix exported libraries of n3ds

CMakeLists.txt

@@ -2643,7 +2643,7 @@ elseif(PSP)
   )
   if(NOT SDL2_DISABLE_SDL2MAIN)
     list(INSERT SDL_LIBS 0 "-lSDL2main")
-  endif(NOT SDL2_DISABLE_SDL2MAIN)
+  endif()
 
 elseif(PS2)
   list(APPEND EXTRA_CFLAGS "-DPS2" "-D__PS2__" "-I$ENV{PS2SDK}/ports/include" "-I$ENV{PS2DEV}/gsKit/include")
@@ -2841,6 +2841,17 @@ elseif(N3DS)
   else()
     message_error("SDL_FILE must be enabled to build on N3DS")
   endif()
+
+  if(NOT SDL2_DISABLE_SDL2MAIN)
+    list(INSERT SDL_LIBS 0 "-lSDL2main")
+  endif()
+
+  foreach(lib ${CMAKE_C_STANDARD_LIBRARIES})
+    if(lib MATCHES "^-l")
+      string(SUBSTRING "${lib}" 2 -1 lib)
+    endif()
+    list(APPEND EXTRA_LIBS ${lib})
+  endforeach()
 endif()
 
 if(HAVE_VULKAN AND NOT SDL_LOADSO)