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Compiler-specific Features
Table 4-18 Predefined macros (continued)
Name Value When defined
__TIME__ time Always defined.
__UINTMAX_TYPE__ – In GNU mode. It defines the correct underlying type for the uintmax_t typedef.
__VERSION__ ver When you specify the --gnu option. It is a string that shows the current version
of the GNU mode being used.
_WCHAR_T – In C++ mode, to specify that wchar_t is a keyword.
__WCHAR_TYPE__ – In GNU mode. It defines the correct underlying type for the wchar_t typedef.
__WCHAR_UNSIGNED__ – In GNU mode when you specify the --cpp option. It is defined if and only if
wchar_t is an unsigned type.
__WINT_TYPE__ – In GNU mode. It defines the correct underlying type for the wint_t typedef.
4.8.2 Function names
Table 4-19 lists builtin variables supported by the ARM compiler for C and C++.
Table 4-19 Builtin variables
Name
__FUNCTION__
__PRETTY_FUNCTION__
Value
Holds the name of the function as it appears in the source.
__FUNCTION__ is a constant string literal. You cannot use the preprocessor to join the
contents to other text to form new tokens.
Holds the name of the function as it appears pretty printed in a language-specific fashion.
__PRETTY_FUNCTION__ is a constant string literal. You cannot use the preprocessor to join
the contents to other text to form new tokens.
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