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Clang で Hello World

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Clang とは

Clang は C や C++ などのC言語系のコンパイラ。

Clang C Language Family Frontend for LLVM

The Clang project provides a language front-end and tooling infrastructure for languages in the C language family (C, C++, Objective C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project. Both a GCC-compatible compiler driver (clang) and an MSVC-compatible compiler driver (clang-cl.exe) are provided. You can get and build the source today.

今回の動作確認環境

macOS Catalina + Apple clang version 11.0.3

$ clang -v
Apple clang version 11.0.3 (clang-1103.0.32.59)
Target: x86_64-apple-darwin19.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.15.4
BuildVersion:   19E287

C で Hello World

以下の hello.c ファイルを用意。

#include <stdio.h>
int main(int argc, char **argv) {
  printf("Hello, world,\n");
}

コンパイル・リンクして実行。

$ clang hello.c
$ ./a.out
Hello, world,

C++ で Hello World

以下の hello.cpp ファイルを用意。

hello.cpp
#include <iostream>
int main(int argc, char **argv) {
  std::cout << "Hello, world." << std::endl;
}

コンパイル・リンクして実行。

$ clang++ hello.cpp
$ ./a.out 
Hello, world.

参考資料

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