| title | description | ms.date | helpviewer_keywords | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Customizing C command-line processing |
How to suppress `main` function argument and environment parameter handling in the runtime startup code. |
11/19/2020 |
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If your program doesn't take command-line arguments, you can suppress the command-line processing routine to save a small amount of space. To suppress its use, include the noarg.obj file (for both main and wmain) in your /link compiler options or your LINK command line.
Similarly, if you never access the environment table through the envp argument, you can suppress the internal environment-processing routine. To suppress its use, include the noenv.obj file (for both main and wmain) in your /link compiler options or your LINK command line.
For more information on runtime startup linker options, see Link options.
Your program might make calls to the spawn or exec family of routines in the C runtime library. If it does, you shouldn't suppress the environment-processing routine, since it's used to pass an environment from the parent process to the child process.