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GNU Compiler Collection, formerly the GNU C Compiler. Originally authored by Richard Stallman in 1987, GCC is a major modern compiler which is used to compile many free software projects, notably Linux. LLVM, formerly known as the Low Level Virtual Machine; Small-C by Ron Cain and James E Hendrix
Languages like Python interpret code at runtime, whereas languages like C++ follow an approach of basing its compiler off of C's compiler. [11] Create an implementation: A first implementation is written. Compilers will convert to other formats, usually ending up as low-level as assembly, even down to binary. [12]
When it was first released in 1987 by Richard Stallman, GCC 1.0 was named the GNU C Compiler since it only handled the C programming language. [1] It was extended to compile C++ in December of that year. Front ends were later developed for Objective-C, Objective-C++, Fortran, Ada, D, Go and Rust, [6] among others. [7]
Flang, Fortran project in development as of 2022; IBM is adopting LLVM in its C/C++ and Fortran compilers. [67] Intel has adopted LLVM for their next generation Intel C++ Compiler. [68] The Los Alamos National Laboratory has a parallel-computing fork of LLVM 8 named "Kitsune". [69] Nvidia uses LLVM in the implementation of its NVVM CUDA ...
The GNU Coding Standards were written by Richard Stallman and other GNU Project volunteers. The standards document is part of the GNU Project and is available from the GNU website. Though it focuses on writing free software for GNU in C, much of it can be applied more generally. In particular, the GNU Project encourages its contributors to ...
GCC and Clang are two major C compilers popular today, both based on the C11 with updates including changes from later specifications such as C17. [ 29 ] [ 30 ] Any source code written only in standard C and without any hardware dependent assumptions is virtually guaranteed to compile correctly on any platform with a conforming C implementation.
Bell Labs started the development and expansion of C based on B and BCPL. The BCPL compiler had been transported to Multics by Bell Labs and BCPL was a preferred language at Bell Labs. [38] Initially, a front-end program to Bell Labs' B compiler was used while a C compiler was developed.
In computer programming, profile-guided optimization (PGO, sometimes pronounced as pogo [1]), also known as profile-directed feedback (PDF) [2] or feedback-directed optimization (FDO), [3] is the compiler optimization technique of using prior analyses of software artifacts or behaviors ("profiling") to improve the expected runtime performance of the program.