No std::to_string(float) in GCC 11

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rjd324

Posted on: 2022/3/16 23:59 #1

Quite a regular

to_string(float) is apparently supported since c++11:
https://en.cppreference.com/w/cpp/string/basic_string/to_string

I am using GCC11 : https://github.com/sodero/adtools/rele ... cc11.1.0-20210531-743.lha

I am trying to build:


type main.cpp 

#include <iostream>

#include <string>



int main()

{

    std::string x = std::to_string(22.2f);

    std::cout<<x<<std::endl;

    return 0;

}





4.Other:Dev/cpp11> g++ -std=c++11 -athread=native -o main main.cpp 

main.cpp: In function 'int main()':

main.cpp:6:39: error: call of overloaded 'to_string(float)' is ambiguous

    6 |         std::string x = std::to_string(22.2f);

      |                         ~~~~~~~~~~~~~~^~~~~~~

In file included from /Programs/SDK/gcc/include/c++/11.1.0/string:55,

                 from /Programs/SDK/gcc/include/c++/11.1.0/bits/locale_classes.h:40,

                 from /Programs/SDK/gcc/include/c++/11.1.0/bits/ios_base.h:41,

                 from /Programs/SDK/gcc/include/c++/11.1.0/ios:42,

                 from /Programs/SDK/gcc/include/c++/11.1.0/ostream:38,

                 from /Programs/SDK/gcc/include/c++/11.1.0/iostream:39,

                 from main.cpp:1:

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6649:3: note: candidate: 'std::string std::__cxx11::to_string(int)'

 6649 |   to_string(int __val)

      |   ^~~~~~~~~

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6660:3: note: candidate: 'std::string std::__cxx11::to_string(unsigned int)'

 6660 |   to_string(unsigned __val)

      |   ^~~~~~~~~

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6668:3: note: candidate: 'std::string std::__cxx11::to_string(long int)'

 6668 |   to_string(long __val)

      |   ^~~~~~~~~

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6679:3: note: candidate: 'std::string std::__cxx11::to_string(long unsigned int)'

 6679 |   to_string(unsigned long __val)

      |   ^~~~~~~~~

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6687:3: note: candidate: 'std::string std::__cxx11::to_string(long long int)'

 6687 |   to_string(long long __val)

      |   ^~~~~~~~~

/Programs/SDK/gcc/include/c++/11.1.0/bits/basic_string.h:6699:3: note: candidate: 'std::string std::__cxx11::to_string(long long unsigned int)'

 6699 |   to_string(unsigned long long __val)

      |   ^~~~~~~~~





g++ --version

g++ (adtools build 11.1.0) 11.1.0

Copyright (C) 2021 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Edited by rjd324 on 2022/3/17 0:18:27

ferrels

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 2:41 #2

Just popping in

@rjd324

why not use sprintf()?

rjd324

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 6:43 #3

Quite a regular

It's a fine suggestion. Believe me, I prefer C, and could also use it here. But the question really is specific. I am wondering why it is not there for our native GCC11 compiler.

sTix

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 9:24 #4

Just popping in

I can't say for sure, but it's likely due to something missing in clib2. Can't verify that here though. Does to_string(int) work?

Raziel

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 11:18 #5

Home away from home

@sTix

Wouldn't that be a problem in newlib?

afxgroup

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 17:02 #6

Amigans Defender

use this code:


namespace std

{

    template <typename T> std::string to_string(const T& n)

    {

        std::ostringstream stm;

        stm << n;

        return stm.str();

    }

}

Hitman

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 17:37 #7

Just popping in

I had the same problem with std::to_string(int) and IIRC the solution to the problem was to compile with -std=gnu++14 instead of -std=c++14.

But then (again IIRC) the solution only worked for either OS3 or OS4 so I had to use the std::stringstream workaround that someone posted in this thread. I don't have access to my development system at the moment so I can't check.

But try -std=gnu++14 or -std=gnu++11 and see if that helps.

sTix

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 19:48 #8

Just popping in

@Raziel
Quote:

Wouldn't that be a problem in newlib?

No, the gcc build (libstdc++v3 to be more specific) that he's using is built using clib2. I don't think it's a lot of work to fix this.

Raziel

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/17 21:39 #9

Home away from home

@sTix

Ah, nice.
So once we get access to the new clib2 we already have gcc11+ aswell?
Sweet...

afxgroup

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/18 9:49 #10

Amigans Defender

if you only need to_string use that piece of code. It will work without any problems

sTix

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/18 12:17 #11

Just popping in

@Raziel
I need to correct myself if I understand ksdhans on Github correctly. The answer to your question is yes :)

kas1e

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/18 21:09 #12

Home away from home

@rjd324

Just tested beta version of upcoming SDK - there all builds fine with newlib. With clib2 it ask for "wchar.h" include, which seems clib2 included with SDK does not have , and there will be needs to use Afxgroup's one, if that will be need it.

rjd324

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/19 5:06 #13

Quite a regular

@kas1e

Do we have a repository of test cases for c++11 features? If this is happening for one of the new library c++11 then it may be happening for others too.

kas1e

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/19 5:22 #14

Home away from home

@rjd324
Quote:

Do we have a repository of test cases for c++11 features? If this is happening for one of the new library c++11 then it may be happening for others too.

Not sure that we have exactly "repo with test cases for c++11" but all the problem about GCC/Binutils and Clib2 we post there:

https://github.com/sba1/adtools/issues

Only with closesourced newlib we post it anywhere and then someone from beta-test ppls put them to os4's bugzilla

rjd324

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/19 5:31 #15

Quite a regular

How can I become a beta tester? Really so that I can report on bugzilla.

kas1e

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/19 5:44 #16

Home away from home

@rjd324
Quote:

How can I become a beta tester? Really so that I can report on bugzilla.

if it was that easy when one want to report one or another bug and they let you join in beta-team because of that.

Hyperion full of betatesters already (and always was) and there even no managment anymore as far as i can tell. You may probabaly try to write to Ben but don't hold your hope there. it was always a big pain to join in.

walkero

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/20 14:48 #17

Site Builder

@rjd324
As much as I know there is no opening right now for beta testers. If there is something that doesn't work with newlib I would suggest contacting kas1e or me and we will bring that to developers' attention.

We will only need a good description of the problem and an example code that make the issue reproducable.

Follow me on
Ko-fi, Twitter, YouTube, Twitch

afxgroup

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/21 17:45 #18

Amigans Defender

Repository is now visible

https://github.com/afxgroup/clib2

DStastny

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/21 17:57 #19

Just popping in

@afxgroup

I am pretty excited about the shared library support. Question has anyone build cross compiler with shared support for C++?

Regards
Doug

afxgroup

Re: No std::to_string(float) in GCC 11

Posted on: 2022/3/21 18:09 #20

Amigans Defender

me :)

You have to replace gcc/repo/gcc/config/rs6000/amigaos.h with this file:

www.amigasoft.net/temp/amigaos.h

Or use specs file included in library
However I suggest to recompile the entire gcc

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