ERROR: <bits/stdc++.h>, 'cstdalign' file not found, running C++17

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I'm trying to run a piece of code in Visual Studio Code, on macOS Catalina. The code:

#include <bits/stdc++.h>
using namespace std;

int main() 
{ 
    // Create an empty vector 
    vector<int> vect;  
     
    vect.push_back(10); 
    vect.push_back(20); 
    vect.push_back(30); 
  
    for (int x : vect) 
        cout << x << " "; 
  
    return 0; 
}

When I try to run the code using the coderunner extension, I get the error:

[Running] cd "/Users/VSC_Files/" && g++ -std=c++17 helloworld.cpp -o helloworld && "/Users/VSC_Files/"helloworld
In file included from helloworld.cpp:1:
/usr/local/include/bits/stdc++.h:57:10: fatal error: 'cstdalign' file not found
#include <cstdalign>
         ^~~~~~~~~~~
1 error generated.

[Done] exited with code=1 in 1.465 seconds

Apparently this is an error only for C++11, then why am I getting this error? I have the latest updated Xcode version and the latest stable build of VSCode too.

EDITED AND ADDED LATER

Also, I would like to add that I manually added the ​​bits/stdc++.h​​ file, and that it wasn't there from before.

Also, when I change ​​g++ -std=c++17​​​ to just ​​g++​​​ when running, the program runs and shows the correct output. With a warning as shown below.
​​​helloworld.cpp:13:15: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]​​

Is there an issue with the default C++ version in mt laptop? Please help!

​​c++​​​​xcode​​​​c++11​​​​visual-studio-code​​​​c++17​​

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​​edited Jul 14, 2020 at 0:44​​

asked Jul 13, 2020 at 13:23

​​Shravan​​

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• 9
  
  dont ever use​​#include <bits/stdc++.h>​​ 
  –​​yaodav​​ ​​​Jul 13, 2020 at 13:26​​​
  
• 1
  
  @yaodav Yes, I realise that does work. But I was wondering why the error I indicated when we use <bits/stdc++.h> was coming. Any idea?
  –​​Shravan​​ ​​​Jul 13, 2020 at 13:36​​​
  
• I'm amazed that a search for​​bits/stdc++.h​​ on SO does not give you an almost daily hit for a similar question 
  –​​rioV8​​ ​​​Jul 13, 2020 at 14:48​​​
  
• 2
  
  Reopened. This header is of course not portable, but if it's there, it should work...
  –​​HolyBlackCat​​ ​​​Jul 13, 2020 at 15:04​​​
  
• What does​​g++ --version​​ print for you? 
  –​​HolyBlackCat​​ ​​​Jul 13, 2020 at 15:06​​​
  

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5 Answers

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4

​​#include<bits/stdc++.h>​​ is an internal header for the GCC and you are not supposed to use it, it's not portable.

remvoe the ​​#include<bits/stdc++.h>​​​ insted write ​​#include<vector>​​​ and ​​#include<iostream>​​​ also remove ​​using namespace std​​ it considered bad practice so you code shod look like this:

#include <vector>
#include <iostream>

int main() 
{ 
    // Create an empty vector 
    std::vector<int> vect;  
     
    vect.push_back(10); 
    vect.push_back(20); 
    vect.push_back(30); 
  
    for (int x : vect) 
        std::cout << x << " "; 
  
    return 0; 
}

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​​edited May 19, 2021 at 13:14​​

answered Jul 13, 2020 at 13:31

​​yaodav​​

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  Yes, I realise that does work. But I was wondering why the error I indicated when we use <bits/stdc++.h> was coming. Any idea?
  –​​Shravan​​ ​​​Jul 13, 2020 at 13:37​​​
  
• 1
  
  <bits/stdc++.h> is internal header could be that part of the header files its including are not in the macOS c++lib is also indecate that from the error message - he cant find "#include <cstdalign>"
  –​​yaodav​​ ​​​Jul 13, 2020 at 13:40​​​
  
• I've added some more info, if that helps!
  –​​Shravan​​ ​​​Jul 14, 2020 at 0:46​​​
  
• According to what version of g++ you have 4.2.1 I don't think it supports c++ 11 try updating your gcc version.
  –​​yaodav​​ ​​​Jul 14, 2020 at 5:59​​​
  
• solved the issue, and subsequent issue comes again, so I continue comment out the error line. It worked!
  –​​Jackson​​ ​​​Feb 3 at 10:37​​​
  

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I was having the same issue. First I installed gcc via homebrew

​​brew install gcc​​

To avoid conflict with the existing gcc (and g++) binaries, homebrew names the binary suffixed with version. At time of this comment, the latest was gcc-10.

You dont have to copy the ​​bits/stdc++.h​​​ after this. Just compile using ​​g++-<major-version-number>​​​ instead of ​​g++​​, which would use the homebrew installed binary instead of the default osx one. For me it is

​​g++-10 -Wall -O2 -std=c++11 test.cpp -o test​​

To check the binary name that homebrew installed you can look in the ​​/usr/local/bin​​ directory because thats where homebrew installs packages.

Also, make sure that ​​usr/local/bin​​​ is before ​​/usr/bin​​​ in your ​​$PATH​​

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answered Sep 14, 2020 at 17:45

​​Himanshu Tanwar​​

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• 1
  
  Also, I am not disagreeing with the other comments saying that we should not use​​bits/stdc++.h​​ and ​​using namespace std;​​ in our code. I put this here, because its good to know how to make it work if we have to use it. 
  –​​Himanshu Tanwar​​ ​​​Sep 14, 2020 at 17:47​​​
  

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1

For me it worked to comment the following lines out in the file ​​bits/stdc++.h​​:

// #include <cstdalign>

...

// #include <cuchar>

The file is located in ​​/usr/local/include/bits/​​​ as well as in ​​/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/bits​​. I don't know if you have to do it in both files but the first one worked for me!

Update Dec 24: If you use the g++ with the command line, there is no need to move any file into any directory!

For example when I use the command: ​​g++ custom_file.cpp​​​ it works fine! In addition you can add ​​-std=c++11​​ to have the most needed functions. Also I don't have to move the ​​bits/stdc++.h​​ file after Xcode get's an update.

I hope this helps!

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​​edited Dec 24, 2020 at 0:03​​

answered Nov 22, 2020 at 18:50

​​Chrissi​​

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• Any answer that recommends either editing or explicitly using the​​bits/stdc++.h​​ header is, IMHO, utterly misleading. 
  –​​Adrian Mole​​ ​​​Nov 22, 2020 at 19:26​​​
  
• According to​​this​​ answer MacOSX does not have the file ​​uchar.h​​ so you cannot ​​#include <cuchar>​​. Maybe you can download it ​​e.g. from here​​ and paste it to the right directory. I haven't tried this yet. 
  –​​Chrissi​​ ​​​Nov 22, 2020 at 22:43​​​
  

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I too got these error, and I solved these error by commenting out the ​​<cstdalign>​​ part.

After you comment out these line it will give 2 more errors - ​​cuchar not found​​​, and ​​<memory_resources> not found​​, comment both of them using " //" . It will not harm you stdc++.h file . And it will definitely work.

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​​edited Jul 13, 2021 at 13:17​​

​​Cristik​​

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answered Jul 13, 2021 at 8:52

​​Archies Singh​​

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I am sharing steps to execute with sample code for array rotation which works with following commands

g++-10 -Wall -O2 -std=c++11 rotatearrayusingdeque.cpp

Then a.out file gets generated.

./a.out

sample code:

#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main() 
{
    int n,r,i,j,temp=0,n1;
    deque<int> v;
    cin>>n>>r;  
    for(i=0;i<n;i++)
    {
        cin>>n1;
        v.push_back(n1);
        
    }
    for(j=0;j<r;j++)
    {
        temp = v.front();
        v.pop_front();
        v.push_back(temp);
    }
    for(auto x:v)
    {
        cout<<x<<" ";
    }
    cout<<endl;

    return 0;
}

Now, there will not be any error, Thanks