Specifications

CAVR-4
Part 2. Compiler reference
Library functions
249
LIBRARY DEFINITIONS SUMMARY
This section lists the header files. Header files may additionally contain target-specific
definitions.
* The functions isxxx, toupper, and tolower declared in the header file ctype.h evaluate
their argument more than once. This is not according to the ISO/ANSI standard.
The following table shows header files that do not contain any functions, but specify
various definitions and data types:
AVR–specific library functions
This section lists the AVR–specific library functions defined in pgmspace.h that allow
access to strings in flash. The _P functions exist in both the IAR CLIB Library and the
IAR DLIB Library, but they allow access to strings in flash only. The
_G functions use
the __generic pointer instead, which means that they allow access to both flash and
data memory. The _G functions are only available in the IAR DLIB Library.
Header file Description
assert.h Assertions
ctype.h* Character handling
iccbutl.h Low-level routines
math.h Mathematics
setjmp.h Non-local jumps
stdarg.h Variable arguments
stdio.h Input/output
stdlib.h General utilities
string.h String handling
Table 78: IAR CLIB Library header files
Header file Description
errno.h Error return values
float.h Limits and sizes of floating-point types
limits.h Limits and sizes of integral types
stdbool.h Adds support for the bool data type in C
stddef.h Common definitions including size_t, NULL,
ptrdiff_t, and offsetof
Table 79: Miscellaneous IAR CLIB Library header files