ARM Compiler toolchain Using ARM C and C++ Libraries and Floating-Point Support: Revisions for Using ARM C and C++ Libraries and Floating-Point Support

Revisions for Using ARM C and C++ Libraries and Floating-Point Support

This appendix describes the technical changes between released issues of this book.

Table 26. Differences between issue D and issue F

Change	Topics affected
Changed the ARMCC`nn`LIB environment variable to ARMCC`n`LIB.	ARM C and C++ library directory structure
Added the values for the arguments to the SIGFPE signal.	ISO-compliant implementation of signals supported by the signal() function in the C library and additional type arguments
Removed `clock()` from the list of unsupported ISO C features.	ISO C features missing from microlib
Where appropriate: prefixed Thumb with 16-bit changed Thumb-1 to 16-bit Thumb changed Thumb-2 to 32-bit Thumb.	Various topics

Table 27. Differences between issue D and issue E

Change	Topics affected
Corrected the library naming conventions.	C and C++ library naming conventions
Added `#pragma import(__use_smaller_memcpy)`.	Differences between microlib and the default C library

Table 28. Differences between issue C and issue D

Change	Topics affected
Added a table footnote for signals SIGILL, SIGINT, SIGSEGV, and SIGTERM. Changed the description for SIGCPPL. Also updated the Caution.	ISO-compliant implementation of signals supported by the signal() function in the C library and additional type arguments
Added subtitles to the topic.	Definition of locale data blocks in the C library

Change

Topics affected

Added a table footnote for signals SIGILL, SIGINT, SIGSEGV, and SIGTERM.

Changed the description for SIGCPPL.

Also updated the Caution.

Added subtitles to the topic.

Table 29. Differences between issue B and issue C

Change	Topics affected
Removed `alloca()` from the first sentence.	Library heap usage requirements of the ARM C and C++ libraries
Removed the item describing `alloca` state from the list.	Use of the __user_libspace static data area by the C libraries
Reworded the `alloca.h` table entry.	Building an application without the C library

Table 30. Differences between issue A and issue B

Change	Topics affected
New topic.	Stack pointer initialization and heap bounds
New topic.	Defining __initial_sp, __heap_base and __heap_limit
New topic.	Extending heap size at runtime
New topic.	mathlib double and single-precision floating-point functions
Textual clarification.	Entering and exiting programs linked with microlib
`__user_setup_stackheap()` clarification.	Direct semihosting C library function dependencies
`__user_libspace()` is a legacy function.	Re-implementation of legacy function __user_libspace() in the C library
Reliance of `remquo()`, `remquof()`, and `remquol()`, on implementation-defined integer value.	How the ARM C library fulfills ISO C specification requirements
`__user_initial_stackheap()` downgraded to legacy support only.	Legacy support for __user_initial_stackheap()
Topic obsolete.	Memory models and the C library
Topic obsolete.	Methods of modifying the runtime memory model with the C library
Topic obsolete.	User-defined C library memory models

Copyright © 2010-2011 ARM. All rights reserved.	ARM DUI 0475F
Non-Confidential	ID091611
PDF version