Predefined Macros for Interoperability

The Intel® C++ Compiler and gcc*/g++* support the following predefined macros:

• __GNUC__
• __GNUG__
• __GNUC_MINOR__
• __GNUC_PATCHLEVEL__

You can specify the -no-gcc option to undefine these macros. If you need gcc interoperability (-cxxlib-gcc), do not use the -no-gcc compiler option.

Warning

Not defining these macros results in different paths through system header files. These alternate paths may be poorly tested or otherwise incompatible.

See Also

• Predefined Macros
• GNU Environment Variables