Help you distinguish GNU, GCC, GCC and G++

FSF -- The Free Software Foundation

Front Page — Free Software Foundation — working together for free software

FSF（ Free Software Foundation ） It's a non-profit organization . The mission is to promote the freedom of computer users around the world , Defend the rights of all software users .FSF Developed GNU Free software operating system .

GNU -- GNU's Not Unix.

The GNU Operating System and the Free Software Movement

GNU Is a class Unix operating system . It's made up of multiple applications 、 System libraries 、 A collection of development tools and even games .GNU The name is “GNU's Not Unix” The recursive acronym for .“GNU” The pronunciation of is g'noo, There is only one syllable , Sounds like “grew”, But we need to put r Replace tone with n The sound .

GCC -- GNU Compiler Collection

GCC, the GNU Compiler Collection- GNU Project
https://en.wikipedia.org/wiki/GNU_Compiler_Collection#Design

GCC（GNU Compiler Collection） yes GNU Compiler collection in ,GCC Support C, C++, Objective-C, Fortran, Ada, Go And other languages as front-end input .GCC The front end compiles source files of different languages into syntax trees , And then give it to a unified backend , The back end is responsible for generating the machine code of the specified architecture .

gcc/g++

GCC Front Ends- GNU Project

gcc、g++ Namely GCC Compiler C Language 、C++ Language front end , Compile separately C and C++ Source code , And to GCC Back end generates machine code .