with DOS/4GW? - Open Watcom

DOS Programming Guide
2.2 Building and Running the Sample DOS Application
To compile and link our example program which is stored in the file HELLO.C, enter the
following command:
C>wcl /l=dos hello.c
The typical messages that appear on the screen are shown in the following illustration.
C>wcl /l=dos hello.c
WATCOM C/C++16 Compile and Link Utility
Copyright by WATCOM International Corp. 1988, 2000. All rights reserved.
WATCOM is a trademark of Sybase, Inc. and its subsidiaries.
wcc hello.c
WATCOM C16 Optimizing Compiler
Copyright by WATCOM International Corp. 1984, 2000. All rights reserved.
WATCOM is a trademark of Sybase, Inc. and its subsidiaries.
hello.c: 6 lines, included 155, 0 warnings, 0 errors
Code size: 17
WATCOM Linker
Copyright by WATCOM International Corp. 1985, 2000. All rights reserved.
WATCOM is a trademark of Sybase, Inc. and its subsidiaries.
loading object files
searching libraries
creating a DOS executable
Provided that no errors were encountered during the compile or link phases, the "hello"
program may now be run.
C>hello
Hello world
If you examine the current directory, you will find that two files have been created. These are
HELLO.OBJ (the result of compiling HELLO.C) and HELLO.EXE (the result of linking
HELLO.OBJ with the appropriate Watcom C/C++ libraries). It is HELLO.EXE that is run by
DOS when you enter the "hello" command.
2.3 Debugging the Sample DOS Application
Let us assume that you wish to debug your application in order to locate an error in
programming. In the previous section, the "hello" program was compiled with default
compile and link options. When debugging an application, it is useful to refer to the symbolic
names of routines and variables. It is also convenient to debug at the source line level rather
than the machine language level. To do this, we must direct both the compiler and linker to
include additional debugging information in the object and executable files. Using the WCL
8 Debugging the Sample DOS Application