As such, GCC does not integrate smoothly into Apple's integrated development environment (IDE). Besides, Apple software uses Objective-C, which is a low priority for GCC developers. The GCC source code, however, is large and somewhat cumbersome as one long-time GCC developer put it referring to LLVM, "Trying to make the hippo dance is not really a lot of fun". The LLVM project originally intended to use GCC's front end. This allowed Apple to support OpenGL on computers using Intel GMA chipsets, increasing performance on those machines. One of the first uses of LLVM was an OpenGL code compiler for OS X that converts OpenGL calls into more fundamental calls for graphics processing units (GPU) that do not support certain features. began extensive use of LLVM in several commercial products, including the iOS SDK and Xcode 3.1. Since v16.0.0, Clang compiles C++ using the GNU++17 dialect by default, which includes features from the C++17 standard and conforming GNU extensions. Its contributors include Apple, Microsoft, Google, ARM, Sony, Intel, and AMD.Ĭlang 17, the latest major version of Clang as of October 2023, has full support for all published C++ standards up to C++17, implements most features of C++20, and has initial support for the upcoming C++23 standard. As with LLVM, it is free and open-source software under the Apache License 2.0 software license. Ĭlang operates in tandem with the LLVM compiler back end and has been a subproject of LLVM 2.6 and later. It includes a static analyzer, and several code analysis tools. It acts as a drop-in replacement for the GNU Compiler Collection (GCC), supporting most of its compilation flags and unofficial language extensions. AArch64, ARMv7, IA-32, x86-64, ppc64le Īpache License 2.0 with LLVM Exceptions Ĭlang ( / ˈ k l æ ŋ/) is a compiler front end for the C, C++, Objective-C, and Objective-C++ programming languages, as well as the OpenMP, OpenCL, RenderScript, CUDA, SYCL, and HIP frameworks.
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