c++ - Undefined identifier
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
Mar 17 2004
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 inmyprogram, 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
Mar 18 2004
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
Mar 23 2004
"Matthew" <matthew stlsoft.org> 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 todefinethis in a headerfile? Maybe you can give me an example. Best regards, -- Max Veen
Mar 24 2004