RealView Compilation Tools Libraries and Floating Point Support Guide: 2.15. C library extensions

2.15. C library extensions

This section describes C library extensions and functions. Some are defined by the ISO/IEC 9899:1999 C standard and some are specific to the ARM compiler. These are summarized in Table 2.16.

Table 2.16. C library extensions

Function	Header file definition	Extension
atoll()	`stdlib.h`	C99 standard
strtoll()	`stdlib.h`	C99 standard
strtoull()	`stdlib.h`	C99 standard
printf()	`stdlib.h`	C99 standard
snprintf()	`stdio.h`	C99 standard
vsnprintf()	`stdio.h`	C99 standard
lldiv()	`stdlib.h`	C99 standard
llabs()	`stdlib.h`	C99 standard
wcscasecmp()	`wchar.h`	GNU extension supported by the ARM libraries.
wcsncasecmp()	`wchar.h`	GNU extension supported by the ARM libraries.
wcstombs()	`stdlib.h`	POSIX extended functionality
alloca()	`alloca.h`	Common nonstandard extension to many C libraries
strlcpy()	`string.h`	Common BSD-derived extension to many C libraries
strlcat()	`string.h`	Common BSD-derived extension to many C libraries
strcasecmp()	`string.h`	Standardized by POSIX.
strncasecmp()	`string.h`	Standardized by POSIX.
_fisatty()	`stdio.h`	Specific to ARM compiler
__heapstats()	`stdlib.h`	Specific to ARM compiler
__heapvalid()	`stdlib.h`	Specific to ARM compiler
_membitcpybl(), _membitcpybb(), _membitcpyhl(), _membitcpyhb(), _membitcpywl(), _membitcpywb(), _membitmovebl(), _membitmovebb(), _membitmovehl(), _membitmovehb(), _membitmovewl(), _membitmovewb()	`string.h`	Specific to ARM compiler

The headers <stdint.h> and <inttypes.h> from C99 are also available.

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