Datasheet

C and C++ Compilers

2.1.2 Source language modes

The ARM compilers have three distinct source language modes that you can use to

compile several varieties of C and C++ source code:

ANSI C In ANSI C mode, the ARM compilers pass release 7.00 of the Plum Hall

C Validation Suite (CVS). This suite has been adopted by the British

Standards Institute for C compiler validation in Europe. The compiler

option

-strict

is used when running the tests.

EC++ This mode applies only to the ARM C++ compilers. The ARM C++

compilers compile the Embedded C++ subset of the ISO/IEC Standard

C++.

C++ This mode applies only to the ARM C++ compilers. The ARM C++

compilers compile ISO/IEC standard C++. The compilers are tested

against Suite++, The Plum Hall Validation Suite for C++, version 5.00.

This is the default language mode for the ARM C++ compilers. The

option

-strict

was used when running the tests.

For more information on how to use compiler options to set the source mode for the

compiler, see Setting the source language on page 2-14.

2.1.3 Inline assembly language

The C and C++ compilers provide inline assemblers to enable you to write optimized

assembly language routines, and access features of the target processor not available

from C or C++. See Inline assembler on page 3-18 for information on the

__asm

keyword. See also the chapter on mixing C, C++, and Assembly language in the ADS

Developer Guide for details of how to use the inline assembler, and for information on

restrictions on inline assembly language. See the ADS Assembler Guide for detailed

information on writing assembly language for the ARM. Using inline Thumb assembly

routines, however, is deprecated and generates a warning message.

2.1.4 Library support

ADS provides both ANSI C libraries in prebuilt binary form and Rogue Wave C++

libraries in prebuilt binary form. See Chapter 4 The C and C++ Libraries for detailed

information about the libraries.

You can create your own definition of target-dependent functions to customize the C

libraries. Processor-specific retargeting is done automatically by setting the compiler

options for processor architecture and family.