The compiler has three distinct source language modes that you can use to compile different varieties of C and C++ source code:
- ISO C90
The compiler compiles C as defined by the 1990 C standard and addenda.
Use the compiler option
--c90to compile C90 code. This is the default behavior.- ISO C99
The compiler compiles C as defined by the 1999 C standard and addenda.
Use the compiler option
--c99to compile C99 code.- ISO C++
The compiler compiles C++ as defined by the 2003 standard, excepting wide streams and export templates.
Use the compiler option
--cppto compile C++ code.
The compiler provides support for numerous extensions to the C and C++ languages. For example, some GNU compiler extensions are supported. The compiler has several modes where compliance to a source language is either enforced or relaxed:
- Strict mode
In strict mode the compiler enforces compliance with the language standard relevant to the source language.
To compile in strict mode, use the command-line option
--strict.- GNU mode
In GNU mode all the GNU compiler extensions to the relevant source language are available.
To compile in GNU mode, use the compiler option
--gnu.
See also
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