Thread: Multiple definition Error

hiya guys!
I've been a "Lurker" for a while so i thought id come out of the C-Closet and as a Q thats been annoying me for a while..
Im trying to install Allegro onto Windows, for use with Dev-Cpp.

I try to comile/run this program, to see if its all good:

Code:

#include <stdio.h>
#include <allegro.h>


int main()
{
    allegro_init();
    printf("allegro Version: %s\n", allegro_id);
    printf("ANY KEY DAMMIT!\n");
    system("pause");
    allegro_exit();
    return 0;
}
END_OF_MAIN()

Yeah i was getting vexed, hence the printf

The errors i get are:

Code:

  multiple definition of `_mangled_main()' 
  first defined here 
  multiple definition of `WinMain@16' 
  first defined here 
  ld returned 1 exit status 
 C:\Dev-Cpp\Makefile.win [Build Error]  [Project1.exe] Error 1

now i initially thought that there was more than lib file that had thrm inside, so on to project options... and i set -lalleg as the "linker"
Same error unfortunatly

So my Q would be...
does anyone (maybe an Allegro Guru) know where the "defenition" of the statements in those errors are kept? Im hoping that once i know that i can delete any multple entries, or files.

If anyone has come across this problem before, and knowws a solution, i would be really grateful for your help!

As an afterthought,
That file is part of a project,
the first file containing:

Code:

#include <allegro.h>

int main (void)
{
    allegro_init();
    set_gfx_mode(GFX_SAFE, 640,480,0,0);
    install_keyboard();
    textout_ex(screen, font, "Hello Dudes",1,1,10,-1);
    textout_ex(screen, font, "Press ESC key",1,12,11,-1);
    while(!key[KEY_ESC]);
    allegro_exit();
    return 0;
}
END_OF_MAIN()

That compiles and runs ok, but im not sure if it will have a bearing on the 1st file.
ive tried commenting out the headers in each of the files, but it just produces more errors (undefined)

Ahh i see!
I misunderstood how "projects" worked!
thanks for clearing it up, makes a bit of sense now!

Ok... progress...
I THINK it may be the library file for the printfs thats not linked (If thats possible)
as a test, i popped in the line:

Code:

allegro_message("Allegro version = %s\n", allegro_id);

which causes a message box to appear with the version number in. Im convinced that the allegro library is being looked at by the compiler.

Right.. i'll srtart again

My program as it is at the moment (Test prog to get everything working)

Code:

#include <stdio.h>
#include <allegro.h>
#include <string.h>

int main()
{
    allegro_init();
    set_gfx_mode(GFX_SAFE,640,480,0,0);
    textprintf_ex(screen,font,0,0,15,-1,
    "Allegro version = &#37;s\n", allegro_id);
    //printf("allegro Version: %s\n", allegro_id);
    //printf("ANY KEY DAMMIT!\n");
    system("pause");
    allegro_exit();
    return 0;
}
END_OF_MAIN()

1)If i compile and run as is... it will compile, but on running, a window opens, then
"Project2.exe has encountered a problem and needs to close. We are sorry for the inconvenience."

2)If i comment out the three lines below allegro_init(), and uncomment the printf's i get a blank window saying "Press any key to continue (Im guessing as a result of system("pause") and the printf's dont... print..f.

3) however, if i add in

Code:

allegro_message("Allegro version = %s\n", allegro_id);

BEFORE the textprintf the mesagebox appears (then so does a window, and problem 1 happens again)

It all really is very strange!

Ok.. ive gotten rid of system("pause"), and have put in install_keyboard(), the readkey(); at the bottom.. shuld have the same effect...
but the inital problem is still occuring.

I saet the project up as a console proj as oppsed to a GUI, and im getting the same prob also
would my alleg42.dll be corrupt or something?

the 1st... "error has occured.. sorry were terminating your program"

If it compiles and runs ok on your compy, it'll be my compiler settings then... but i cant think which one...

Th closing console one.. im sure allegro, or even general C++ libs should have function that can allow/handle the x being hit, but thats a bridge in the distance