4. Using Run-Time-Support Functions and Building Libraries

Some of the features of C/C++ (such as I/O, dynamic memory allocation, string operations, and trigonometric functions) are provided as an ANSI/ISO C/C++ standard library, rather than as part of the compiler itself. The TI implementation of this library is the run-time-support library (RTS). The C/C++ compiler implements the ISO standard library except for those facilities that handle exception conditions, signal and locale issues (properties that depend on local language, nationality, or culture). Using the ANSI/ISO standard library ensures a consistent set of functions that provide for greater portability.

In addition to the ANSI/ISO-specified functions, the run-time-support library includes routines that give you processor-specific commands and direct C language I/O requests. These are detailed in C and C++ Run-Time Support Libraries and The C I/O Functions.

Table of Contents

• 4.1. C and C++ Run-Time Support Libraries
  • 4.1.1. Linking Code With the Object Library
  • 4.1.2. Header Files
  • 4.1.3. Support for String and Character Handling
  • 4.1.4. Support for time.h and time_t
  • 4.1.5. Minimal Support for Internationalization
  • 4.1.6. Allowable Number of Open Files
  • 4.1.7. Nonstandard Header Files in the Source Tree
  • 4.1.8. Library Naming Conventions
• 4.2. The C I/O Functions
  • 4.2.1. High-Level I/O Functions
  • 4.2.2. Overview of Low-Level I/O Implementation
  • 4.2.3. Device-Driver Level I/O Functions
  • 4.2.4. Adding a User-Defined Device Driver for C I/O
  • 4.2.5. The device Prefix
• 4.3. Handling Reentrancy (_register_lock() and _register_unlock() Functions)