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'bits/stdc++.h' file not foundの対処法

Last updated at Posted at 2022-02-26
#include <bits/stdc++.h>
using namespace std;

int main()
{
	cout << "Hello, bits!" << endl;
	return 0;
}

上記コードをコンパイルすると以下のエラーが発生しました。

$ clang++ test.cpp
test.cpp:1:10: fatal error: 'bits/stdc++.h' file not found
#include <bits/stdc++.h>
         ^~~~~~~~~~~~~~~
1 error generated.

bits/stdc++.hファイルが存在していないというエラーが出ています。

以下解決策です。

1. clang -v でデフォルトで参照するパスを確認する

$ clang++ -v test.cpp 
Homebrew clang version 13.0.1
Target: x86_64-apple-darwin21.2.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin
... 省略 ...
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/opt/llvm/bin/../include/c++/v1
 /usr/local/Cellar/llvm/13.0.1/lib/clang/13.0.1/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/System/Library/Frameworks (framework directory)
... 省略 ...

#include <...> search starts here: 以下に参照しているディレクトリが表示されています。

2. パスにbits/stdc++.hを作成する

1.で確認したパス内にbits/stdc++.hを作成します。

https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/precompiled/stdc%2B%2B.h
こちらからソースをコピーして貼り付けます。

$ cd /usr/local/opt/llvm/bin/../include/c++/v1
$ mkdir bits
$ touch bits/stdc++.h # ここにソースを貼る

めでたくこれで動きました。

$ clang++ test.cpp
$ ./a.out
$ Hello, bits!

参考

gcc コンパイルオプション備忘録

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