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C99 language features available in C++ and C90

The compiler supports numerous extensions to the ISO C++ standard and to the C90 language, for example, function prototypes that override old-style nonprototype definitions.

These extensions are available if:

  • the source language is C++ and you are compiling in nonstrict mode

  • the source language is C90 and you are compiling in nonstrict mode.

These extensions are not available if:

  • the source language is C++ and the compiler is restricted to compiling strict Standard C++ using the --strict compiler option.

  • the source language is C90 and the compiler is restricted to compiling strict Standard C using the --strict compiler option.

Note

Language features of Standard C, for example long long integers, might be similar to the language extensions described in this section. Such features continue to remain available if you are compiling strict Standard C++ or strict C90 using the --strict compiler option.

See: