RealView Compilation Tools - ARM Information Center

Compiler-specific Features
4.3 Function attributes
The __attribute__ keyword enables you to specify special attributes of variables or
structure fields, functions, and types. The keyword format is either:
__attribute__ ((attribute1, attribute2, ...))
__attribute__ ((__attribute1__, __attribute2__, ...))
For example:
void * Function_Attributes_malloc_0(int b) __attribute__ ((malloc));
static int b __attribute__ ((__unused__));
Table 4-3 summarizes the available function attributes.
Table 4-3 Function attributes supported by the compiler and their equivalents
Function attribute
non-attribute equivalent
__attribute__((alias)) -
__attribute__((always_inline))
__attribute__((const))
__forceinline
__pure
__attribute__((deprecated)) -
__attribute__((malloc)) -
__attribute__((noinline))
__declspec(noinline)
__attribute__((no_instrument_function))
__attribute__((nomerge)) -
__attribute__((nonnull))
__attribute__((noreturn))
__declspec(noreturn))
__attribute__((notailcall)) -
__attribute__((pure)) -
__attribute__((unused)) -
__attribute__((used)) -
__attribute__((visibility("visibility_type")))
__attribute__((weak))
__weak
__attribute__((weakref("target")))
ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-31
ID101213
Non-Confidential,