GCC

Home

Programming

Preprocessor

Compilers

GCC

Description

The GNU Compiler Collection.

Macros

Type	Macro	Description
Identification	`__GNUC__`
Version	`__GNUC__`	Version
Version	`__GNUC_MINOR__`	Revision
Version	`__GNUC_PATCHLEVEL__`	Patch (introduced in version 3.0)

Examples

Version	`__GNUC__`	`__GNUC_MINOR__`	`__GNUC_PATCHLEVEL__`
2.5.x	`2`	N/A	N/A
2.7.x	`2`	`7`	N/A
3.0.2	`3`	`0`	`2`

Notes

Notice that the meaning of the __GNUC__ macro has changed subtly over the years, from identifying the GNU C/C++ compiler to identifying any compiler that implements the GNU compiler extensions (see the Feature request - a macro defined for GCC discussion for further information).

For example, the Intel C++ on Linux also defines these macros from version 8.1 (see the Intel C++ Compiler 8.1 for Linux Release Notes and Intel Compilers for Linux: Compatibility with GNU Compilers.)