Compile problem in VC++ 6 Win2k

SDL Development
1

This is probably a stupid newbie question, but I
couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001: unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Everything was set right (include directories,
libraries included in project, DLL file in project
directory, using multithreaded DLLs).

I then tried just creating a new c++ file and let VC++
create a new project when I tried to compile. After
playing with it some, (set it to not use default
libraries and manually included msvcrt.dll), I got the
program to compile correctly. This worked for a few
compiles, but then, I got the same linker error again.
Now, no matter what I do, I can’t seem to get it to
work. I even tried a new project, going through the
same steps, with no results.

Probably just a newbie problem, but it’s driving me
nuts.

Thanks,
Michael Cowart__________________________________________________
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2

Create a Win32 application (not a console application) in VC6.
Link to the Multithreaded DLL.
Link to sdl.lib and sdlmain.lib.
Create a ‘main’ function.
Make sure ‘SDL.H’ is included in the file which ‘main’ is in.

Michael Cowart wrote:>

This is probably a stupid newbie question, but I
couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001: unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Everything was set right (include directories,
libraries included in project, DLL file in project
directory, using multithreaded DLLs).

I then tried just creating a new c++ file and let VC++
create a new project when I tried to compile. After
playing with it some, (set it to not use default
libraries and manually included msvcrt.dll), I got the
program to compile correctly. This worked for a few
compiles, but then, I got the same linker error again.
Now, no matter what I do, I can’t seem to get it to
work. I even tried a new project, going through the
same steps, with no results.

Probably just a newbie problem, but it’s driving me
nuts.

Thanks,
Michael Cowart

Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

3

I did all that. Win32 (not console),multithreaded
DLLs, main function, added sdl.lib and sdlmain.lib to
project(not just copied to directory),added include
directory.

The program actually DID compile a few times without
any problems. I was working through some of the
example code, and after about 4 rebuilds, the linker
error came back. That’s what I don’t understand. Now,
I can’t get anything to compile (new project, followed
same procedure that made the first one work, I even
tried restarting VC). I truly have no clue.

Mike

— Adam Gates wrote:> Create a Win32 application (not a console

application) in VC6.
Link to the Multithreaded DLL.
Link to sdl.lib and sdlmain.lib.
Create a ‘main’ function.
Make sure ‘SDL.H’ is included in the file which
’main’ is in.

Michael Cowart wrote:

This is probably a stupid newbie question, but I
couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I
got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001:
unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Everything was set right (include directories,
libraries included in project, DLL file in project
directory, using multithreaded DLLs).

I then tried just creating a new c++ file and let
VC++
create a new project when I tried to compile.
After
playing with it some, (set it to not use default
libraries and manually included msvcrt.dll), I got
the
program to compile correctly. This worked for a
few
compiles, but then, I got the same linker error
again.
Now, no matter what I do, I can’t seem to get it
to
work. I even tried a new project, going through
the
same steps, with no results.

Probably just a newbie problem, but it’s driving
me
nuts.

Thanks,
Michael Cowart

Do You Yahoo!?
Make international calls for as low as $.04/minute
with Yahoo! Messenger
http://phonecard.yahoo.com/

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

4

This is probably a stupid newbie question, but I
couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001: unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Make sure that you include “SDL.h” in the file containing
main() and that you declare it like so:

int main(int argc, char *argv[])

See ya,
-Sam Lantinga, Software Engineer, Blizzard Entertainment

5

Oops… argv is ALWAYS a double pointer…I feel
REALLY stupid. I guees I need more sleep =)

At least it isn’t as bad as getting DirectX running =)

Thanks
Mike

— Sam Lantinga wrote:> > This is probably a stupid newbie question, but I

couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I
got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001:
unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Make sure that you include “SDL.h” in the file
containing
main() and that you declare it like so:

int main(int argc, char *argv[])

See ya,
-Sam Lantinga, Software Engineer, Blizzard
Entertainment

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

6

Hi there,
I had a similar problem once and I’ve discovered that I didn’t set the
main() function to accept arguments. Your main() function prototype must be
int main( int argc, char* argv[] ). I hope this will help you.

Mahmoud Al Gammal> ----- Original Message -----

From: sdl-admin@libsdl.org [mailto:sdl-admin at libsdl.org]On Behalf Of Michael
Cowart
Sent: Wednesday, August 15, 2001 6:12 AM
To: sdl at libsdl.org
Subject: [SDL] compile problem in VC++ 6 Win2k

This is probably a stupid newbie question, but I
couldn’t find one just like it in the archives.

The first time I tried to compile a SDL program, I got
this error in VC++ 6:

SDLmain.lib(SDL_main.obj) : error LNK2001: unresolved
external symbol _SDL_main
Debug/duh.exe : fatal error LNK1120: 1 unresolved
externals

Everything was set right (include directories,
libraries included in project, DLL file in project
directory, using multithreaded DLLs).

I then tried just creating a new c++ file and let VC++
create a new project when I tried to compile. After
playing with it some, (set it to not use default
libraries and manually included msvcrt.dll), I got the
program to compile correctly. This worked for a few
compiles, but then, I got the same linker error again.
Now, no matter what I do, I can’t seem to get it to
work. I even tried a new project, going through the
same steps, with no results.

Probably just a newbie problem, but it’s driving me
nuts.

Thanks,
Michael Cowart