iRMX C Library Reference - tenAsys

Supplied C Library Files
The iRMX OS provides header (include) files containing declarations for C library
functions and definitions of related macros and data types. The shared C library
loadable job is clib.job.
32-bit interface libraries are provided, as well as cstart modules which initialize
processes and call main().
There are a variety of interface libraries supplied with the OS for the interface to C
library functions and iRMX system calls. For different Intel and non-Intel tools you
must bind (link) to different libraries.
See also: Cstart, iC-386 Compiler User's Guide,
Cstart modules to use with non-Intel compilers, Programming
Techniques,
Interface libraries, System Call References, for a complete list of
interface libraries for different compilers,
Header files for a description of the include libraries, in this chapter,
clib.job, System Configuration and Administration
The Cstart Module
Each application must link to the cstart module. This code makes library calls that
set up an internal C environment for your application. To make initialization changes
in earlier (individually linked) versions of the C library, you would change source
code for the cstart module and reassemble it before linking to your code. With the
shared C library it is rarely necessary to make initialization changes in cstart.
However, there are two configuration changes you can make.
The source code for the cstart module defines values for two literals used in parsing
of command lines. Edit and re-assemble a copy of the cstart source code to change
these values:
• _ARGV_MAX, the maximum number of command-line parameters (argv)
• _COMMAND_MAX, the maximum number of characters in a command line
DOS Syntax
You can use DOS syntax or iRMX syntax in all C library calls that require a
pathname argument. DOS backslashes are converted to iRMX forward slashes and
DOS device names are converted to iRMX logical names.
C Library Reference Chapter 1 5