RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
Table 4-18 Predefined macros (continued)
Name Value When defined
__MODULE__ mod Contains the filename part of the value of __FILE__.
__NO_INLINE__ – When you specify the --no_inline option in GNU mode.
__OPTIMISE_LEVEL num Always set to 2 by default, unless you change the optimization level using the
-Onum option.
__OPTIMISE_SPACE – When you specify the -Ospace option.
__OPTIMISE_TIME – When you specify the -Otime option.
__OPTIMIZE__ – When -O1 or -O2 is specified in GNU mode.
__OPTIMIZE_SIZE__ – When -Ospace is specified in GNU mode.
__PLACEMENT_DELETE – In C++ mode to specify that placement delete (that is, an operator delete
corresponding to a placement operator new, to be called if the constructor
throws an exception) is enabled. This is only relevant when using exceptions.
__PTRDIFF_TYPE__ – In GNU mode. It defines the correct underlying type for the ptrdiff_t typedef.
__RTTI – In C++ mode when RTTI is enabled.
__sizeof_int 4 For sizeof(int), but available in preprocessor expressions.
__sizeof_long 4 For sizeof(long), but available in preprocessor expressions.
__sizeof_ptr 4 For sizeof(void *), but available in preprocessor expressions.
__SIZE_TYPE__ – In GNU mode. It defines the correct underlying type for the size_t typedef.
__SOFTFP__ – If compiling to use the software floating-point calling standard and library. Set
when you specify the --fpu=softvfp option for ARM or Thumb, or when you
specify --fpu=softvfp+vfpv2 for Thumb.
__STDC__ – In all compiler modes.
__STDC_VERSION__ – Standard version information.
__STRICT_ANSI__ – When you specify the --strict option.
__TARGET_ARCH_ARM num The number of the ARM base architecture of the target CPU irrespective of
whether the compiler is compiling for ARM or Thumb.
__TARGET_ARCH_THUMB num The number of the Thumb base architecture of the target CPU irrespective of
whether the compiler is compiling for ARM or Thumb. The value is defined as
zero if the target does not support Thumb.
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