Gcc

GCC

	GCC Predefined Macros
MACRO	GCC OPTION	VERSION	DESCRIPTION
`GNUC`		all	Defined to the major version of the compiler.
`GNUC_MINOR`		all	Defined to the minor version of the compiler.
`GNUC_PATCHLEVEL`		all	Defined to the micro (patch) version of the compiler.
`GNUG`		all	Defined to the same value as `GUNC` in C++ mode.
`CYGWIN`	Cygwin	all	Defined when compiling for the Cygwin environment without -mno-cygwin option.
`MINGW32`	MinGW	all	Defined when compiling for the MinGW environment or when compiling for the Cygwin environment with -mno-cygwin option specified.
`_WIN32`	MinGW	all	Defined when compiling for the MinGW environment or when compiling for the Cygwin environment with -mno-cygwin option specified.

New GCC Heavy on Optimization a March 2^nd, 2006 internetnews.com article By Sean Michael Kerner.
The Definitive Guide to GCC, Second Edition by William von Hagen.
An Introduction to GCC by Brian J. Gough, Richard M. Stallman.
Performance Tuning with GCC, Part 1, a September 2005 Red Hat Magazine article by Diego Novillo.
Optimization in GCC, a January 26^th, 2005 Linux Journal article by M. Tim Jones.
GCC Myths and Facts, a February 15^th, 2003 Freshmeat editorial by Joao Seabra.