How do I determine the default C standard used by g ?

Determining the Default C Standard in g

When compiling C code using g , the default C standard is automatically selected by the compiler. This default standard varies depending on the g version used. If a specific C standard is not explicitly specified during compilation, g will use its internal default.

To determine the default C standard used by g , follow these steps:

g++ -dM -E -x c++ /dev/null | grep -F __cplusplus

For example, if your g version is 4.8.4, you will get the following output:

#define __cplusplus 199711L

This output indicates that the default C standard used by g 4.8.4 is C 11.

Additional Considerations

• For versions of g earlier than 4.7, the -dM option is not supported, and you cannot explicitly determine the default C standard.
• In most cases, it is recommended to explicitly specify the desired C standard using the -std= option during compilation. This ensures that your code is compiled using the specific standard you intended.
• Always refer to the official g documentation for the most up-to-date information on supported C standards.

The above is the detailed content of How do I determine the default C standard used by g ?. For more information, please follow other related articles on the PHP Chinese website!