[SDL] sdlmain

[Julien Lecomte]

On 04/07/2006 17:39, Torsten Giebl wrote:
> Hello !
> 
>> -mconsole just prevents a console from being opened at start of program.
>> It doesn't define anything or change linking in any way apart from what
>> I said above.
> 
> You do not understand me right. For me it would be usefull, when
> your app is a console app so compiling with -mconsole to have the
> output on that console and when compiling in Windowed Mode
> with -mwindows the files should be created. I do not know
> if it is possible to detect this at runtime.

I don't see why you need to detect this at runtime; after all, you've 
decided to link either in console or windows mode, so you know if you 
have a console or not.

Since you know if you'll have a console or not, you can compile two 
SDLmain libraries (one with --disable-stdio-redirect, see FAQ: 
http://www.libsdl.org/cgi/docwiki.cgi/FAQ_20Console) which I'll name 
libSDLconsole and libSDLwindows, and use the correct one at link time.

You can then use two different command lines for two different targets:
$ gcc -mconsole foobar.c -lmingw32 -lSDLconsole -lSDL
$ gcc -mwindows foobar.c -lmingw32 -lSDLwindows -lSDL


If you nevertheless want to detect this at runtime, you can detect a 
console at runtime with GetConsoleWindow, but this is non portable 
(windows specific and WinXP or better).
----
#define _WIN32_WINNT 0x0500

#include <stdio.h>
#include <windows.h>
int main(void)
{
   if (GetConsoleWindow())
     printf("console\n");
   else
     printf("not console\n");
   return 0;
}
----