Hello everyone,

I'am trying to create a thread with _beginthread() that uses a C-runtime library. I have included <process.h> in my program. After compiling with DMC, I got the message 'Undefined identifier _beginthread and undefined identifier _endthread'. How is that possible?

When I explicitely declare the _beginthread() and _endthread functions in my
program, the DMC compiler (V8.38) compiles with no errors and warnings.
But after building the program the Output window gives 2 errors: 'Symbol
Undefined ?_beginthreadxxxxx(0 and Symbol Undefined ?_endthreadxxxxxxx().
So, what could be the reason for these errors?
Do I have to include a special library in my project, so the build process
will then be fine?
I can't come out of this problem. Is there anyone who has experience with
these thread functions?

Help would be greatly appriciated!

Regards,

Max Veen

to use the functions in process.h you must define _MT, via the appropriate option. I assume they're the same as with VC++, i.e. -MD, -MT, -MDd, -MTd, but I can't say for sure off the top of my head. Check out the DMC++ website

"Max Veen" <marove@wanadoo.nl> wrote in message news:c394en$107h$1@digitaldaemon.com...
> Hello everyone,
>
> I'am trying to create a thread with _beginthread() that uses a C-runtime library. I have included <process.h> in my program. After compiling with DMC, I got the message 'Undefined identifier _beginthread and undefined identifier _endthread'. How is that possible?
>
> When I explicitely declare the _beginthread() and _endthread functions in
my
> program, the DMC compiler (V8.38) compiles with no errors and warnings.
> But after building the program the Output window gives 2 errors: 'Symbol
> Undefined ?_beginthreadxxxxx(0 and Symbol Undefined ?_endthreadxxxxxxx().
> So, what could be the reason for these errors?
> Do I have to include a special library in my project, so the build process
> will then be fine?
> I can't come out of this problem. Is there anyone who has experience with
> these thread functions?
>
> Help would be greatly appriciated!
>
> Regards,
>
> Max Veen
>
>
>
>

Matthew, what kind of option do you mean when using _MT? Do I have to define
this in a headerfile?
Maybe you can give me an example.

Best regards,
-- 
Max Veen

It would be a command-line build. Unless it is defined, process.h will not declare the CRT threading functions.

AFAICT, DMC++ goes along with the VC++ standard of _MT

"Max Veen" <marove@wanadoo.nl> wrote in message news:c3pk53$1ce8$1@digitaldaemon.com...
> Matthew, what kind of option do you mean when using _MT? Do I have to
define
> this in a headerfile?
> Maybe you can give me an example.
>
> Best regards,
> -- 
> Max Veen
>
>
>
>