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RealView Libraries and Floating Point Support Guide
Preface Introduction The C and C++ Libraries About the C and C++ libraries
Features of the C and C++ libraries Namespaces Writing reentrant and thread‑safe code Introduction to reentrancy and thread‑safety Use of static data in the C libraries The __user_libspace static data area Managing locks in multithreaded applications Using the ARM C libraries with a multithreaded app Thread‑safety in the ARM C libraries Thread‑safety in the ARM C++ libraries Building an application with the C library Using the libraries with an application Building an application for a semihosted environme Building an application for a non semihosting envi Building an application without the C library Integer and FP helper functions Bare machine integer C Bare machine C with floating‑point Exploiting the C library The standalone C library functions Tailoring the C library to a new execution environ How C and C++ programs use the library functions __rt_entry Exiting from the program __rt_exit() __rt_lib_init() __rt_lib_shutdown() Tailoring static data access Tailoring locale and CTYPE using assembler macros Selecting locale at link time Selecting locale at runtime Defining a locale block LC_CTYPE data block LC_COLLATE data block LC_MONETARY data block LC_NUMERIC data block LC_TIME data block _get_lconv() localeconv() setlocale() _findlocale() The lconv structure Tailoring locale and CTYPE using C macros Selecting locale at link time Selecting locale at runtime Macros and utility functions _get_lc_ctype() _get_lc_collate() _get_lc_monetary() _get_lc_numeric() _get_lc_time() _get_lconv() localeconv() setlocale() _findlocale() __LC_CTYPE_DEF __LC_COLLATE_DEF __LC_TIME_DEF __LC_NUMERIC_DEF __LC_MONETARY_DEF __LC_INDEX_END The lconv structure Tailoring error signaling, error handling, and pro _sys_exit() errno __rt_errno_addr() __raise() __rt_raise() __default_signal_handler() _ttywrch() __rt_fp_status_addr() Tailoring storage management Avoiding the ARM‑supplied heap and heap‑using Support for malloc Tailoring the runtime memory model The memory models Controlling the runtime memory model Writing your own memory model __user_initial_stackheap() __user_setup_stackheap() __user_heap_extend() __user_heap_extent() __user_stack_cleanup_space() __rt_heap_extend() __rt_stack_postlongjmp() Tailoring the input/output functions Dependencies on low‑level functions Target‑dependent input/output support functions _sys_open() _sys_close() _sys_read() _sys_write() _sys_ensure() _sys_flen() _sys_seek() _sys_istty() _sys_tmpnam() _sys_command_string() #pragma import(_main_redirection) Tailoring other C library functions clock() _clock_init() time() remove() rename() system() getenv() _getenv_init() Selecting real‑time division ISO implementation definition ISO C library implementation definition Standard C++ library implementation definition C library extensions atoll() strtoll() strtoull() printf() snprintf() vsnprintf() lldiv() llabs() wcstombs() alloca() strlcpy() strlcat() _fisatty() __heapstats() __heapvalid() Library naming conventions Placing ARM libraries Helper libraries Identifying library variants The C Micro-library Floating‑point SupportIdentifying library variants
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| Home > The C and C++ Libraries > Library naming conventions > Identifying library variants | |||
The library filename identifies how the variant was built. The values for the fields of the filename, and the relevant build options are:
*root/prefix_arch[fpu][entrant].endian
rootarmlibAn ARM C library.
cpplibAn ARM C++ library.
prefixcISO C and C++ basic runtime support.
cppRogue Wave C++ library.
cpprtThe ARM C++ runtime libraries.
fIEEE compliant library with a fixed rounding mode (Round to nearest) and no inexact exceptions.
fjIEEE compliant library with a fixed rounding mode (Round to nearest) and no exceptions.
fzBehaves like the
fjlibrary, but additionally flushes denormals and infinities to zero.This library behaves like the ARM VFP in Fast mode. This is the default.
gIEEE compliant library with configurable rounding mode and all IEEE exceptions.
hCompiler support (helper) library. See Helper libraries.
mTranscendental math functions.
mcNon compliant ISO C micro-library basic runtime support.
mfNon compliant IEEE 754 micro-library support.
arch4An ARM only library for use with ARMv4.
tAn ARM/Thumb interworking library for use with ARMv4T.
5An ARM/Thumb interworking library for use with ARMv5.
wA Thumb‑2 only library only library for use with Cortex-M3.
pA Thumb‑1 only library only library for use with Cortex-M1.
fpuvUses VFP instruction set.
sSoft VFP.
Note
If neither
vnorsis present in a library name, the library uses no floating point.
entrantePosition-independent access to static data.
endianlLittle‑endian.
bBig‑endian.
For example:
*armlib/c_4.b *cpplib/cpprt_5f.l
Note
Not all variant/name combinations are valid. See the armlib and cpplib directories for the libraries that are supplied with RVCT.
The linker command-line option ‑‑info libraries provides information on every library automatically selected for the link stage. See Generating image-related information in the Linker Guide for more information.
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0378A |
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