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Declarations
| Non-Confidential |  PDF version | 101754_0615_00_en | ||
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| Home > Appendixes > Standard C++ Implementation Definition > Declarations | ||||
B.7 Declarations
Describes implementation-defined aspects of the Arm® C++ compiler and C++ library relating to declarations, as required by the ISO C++ Standard.
- Meaning of attribute declaration (7).
Arm Compiler 6 is based on LLVM and Clang technology. Clang defines several attributes as specified by the Clang documentation at https://clang.llvm.org/docs/AttributeReference.html.
From these attributes, Arm Compiler 6 supports attributes that are scoped with
gnu::(for compatibility with GCC) andclang::.- Underlying type for enumeration (7.2).
- The underlying type for enumerations without a fixed underlying type is
intorunsigned int, depending on the values of the enumerators. The–fshort-enumscommand-line option uses the smallest unsigned integer possible, or the smallest signed integer possible if any enumerator is negative, starting withchar. - Meaning of an
asmdeclaration (7.4). - An
asmdeclaration enables the direct use of T32, A32, or A64 instructions. - Semantics of linkage specifiers (7.5).
- Only the string-literals "C" and "C++" can be used in a linkage specifier.
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