Question

I am trying to use exceptions for the first time
but even though it is quite a simple example I
just cannot get it to compile, I have looked
at several examples and tried coding it in
many, many different ways
but I am still not even sure exactly where
the problem is because I get namemangling
when I introduce the catch/try/throw anyway
here is my code hopefully it is something
really stupid 🙂

#include "Surface.h"
#include "SDL_Image.h"

using namespace std;

SDL_Surface* surface::Load(string fileName){

   SDL_Surface* loadedSurface = IMG_Load(fileName.c_str());
   if(loadedSurface == 0) throw 0;

   //Convert surface to same format as display
   loadedSurface = SDL_DisplayFormatAlpha(loadedSurface);

   return loadedSurface;
}

---

#include "GameState.h"
#include "Surface.h"

#include<iostream>

using namespace std;

GameState::GameState(string fileName){

   try{
      stateWallpaper_ = surface::Load(fileName);
   }
   catch(int& e){
      cerr << "Could not load " << fileName << endl;
   }
}

Thanks in advance for any help!

EDIT: Sorry I forgot to post the error message: It is

In function `ZN14GameStateIntroC1Ev':|
-undefined reference to `__gxx_personality_sj0'|
-undefined reference to `_Unwind_SjLj_Register'|
-undefined reference to `_Unwind_SjLj_Unregister'|
In function `ZN14GameStateIntroC1Ev':|
undefined reference to `_Unwind_SjLj_Resume'|
In function `ZN14GameStateIntroC2Ev':|
-undefined reference to `__gxx_personality_sj0'|
-undefined reference to `_Unwind_SjLj_Register'|
-undefined reference to `_Unwind_SjLj_Unregister'|
obj\Release\GameStateIntro.o||In function `ZN14GameStateIntroC2Ev':|
C:\Program Files (x86)\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\include\c++\3.4.5\ext\new_allocator.h|69|undefined reference to `_Unwind_SjLj_Resume'|
C:\MinGW\lib\libSDLmain.a(SDL_win32_main.o)||In function `redirect_output':|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|219|undefined reference to `SDL_strlcpy'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|220|undefined reference to `SDL_strlcat'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|243|undefined reference to `SDL_strlcpy'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|244|undefined reference to `SDL_strlcat'|
C:\MinGW\lib\libSDLmain.a(SDL_win32_main.o)||In function `console_main':|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|296|undefined reference to `SDL_strlcpy'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|301|undefined reference to `SDL_GetError'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|312|undefined reference to `SDL_SetModuleHandle'|
C:\MinGW\lib\libSDLmain.a(SDL_win32_main.o)||In function `WinMain@16':|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|354|undefined reference to `SDL_getenv'|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|386|undefined reference to `SDL_strlcpy'|
C:\MinGW\lib\libSDLmain.a(SDL_win32_main.o)||In function `cleanup':|
\Users\slouken\release\SDL\SDL-1.2.15\.\src\main\win32\SDL_win32_main.c|158|undefined reference to `SDL_Quit'|

**

Answer 1

From your error message, the problem is not related to exceptions in any way, but to your linking. You are using SDL headers but not linking to the SDL library, use the proper -L option.