https://gcc.gnu.org/gcc-15/

Some discussion on hackernews: https://news.ycombinator.com/item?id=43792248

Awhile back, there was some discussion of code like this:

char a[3] = "123";

which results in a an array of 3 chars with no terminating NUL byte, and no warning from the compiler about this (was not able to find that discussion or I would have linked it). This new version of gcc does have a warning for that. https://gcc.gnu.org/pipermail/gcc-patches/2024-June/656014.html And that warning and attempts to fix code triggering it have caused a little bit of drama on the linux kernel mailing list: https://news.ycombinator.com/item?id=43790855

I apologize for the long post in advanced-- I'm just trying to describe what I've already tried as best as possible in order to better troubleshoot the issue.

I am in an introductory C++ class and we have been using the school computers with all the environments already pre-configured for us. The teacher told us that we can simply download CodeBlocks or XCode for Win/macOS and use the GNU/GCC compiler without any problems. He also stated multiple times that for our curriculum, we would require this compiler specifically instead of something like MSVC, since it better follows traditional C++ standards and allows teachers and students to build any source code on multiple machines.

I installed Codeblocks a little while ago and I'm trying to get my source code running on my home computer now. To my surprise, Codeblocks could not automatically find the compiler on my system after following the default installation (full features). When doing a custom Windows Explorer search for the compiler executable on my entire hard drive, it could not find any trace of the file located on my computer either. Our teacher said that this compiler should be included in the Codeblocks installation, but it looks to me as though didn't install it whatsoever. I also checked to ensure I was downloading the latest version, re-ran the installation as admin, but there was still no trace of the compiler anywhere to be found.

After doing some investigating online, I learned that the GNU compiler is actually not a Windows compiler at all but was mainly developed for Unix based systems first. The compiler that Codeblocks expects is actually "mingw" which is apparently a port of the free GCC compiler from these other platforms.

I found the "mingw installation manager" binary package online, installed it on my system, then proceeded to download and install all the packages under the mingw repositories 'basic setup'. After applying the changes, it installed mingw to a root folder on my C:\\ drive where Codeblocks first expected it, which then allowed me to build/run the basic example script "Hello World" within the IDE. All seemed well now, except there were still some other problems happening...

While trying to build my script I'd previously been working on, one of the namespaces from the <thread> library threw a compiler error. This error did not show up while working on the school's computers, which leads me to believe that I might be missing some additional packages of some sort. If this is the case, then this is going to cause a lot of trouble down the road when trying to build source code that could be using correct syntax but missing some other resource.

To ensure that I am not just crazy, please see this small snip-it to verify the source code:

#include <iostream>
#include <thread>
#include <string>
#include <chrono>

using namespace std;
using namespace std::chrono;
using namespace std::this_thread;

// error: compiler complains that "this_thread" is not a namespace-name

In my global compiler settings within Codeblocks, I have also checked the following box:

Have g++ follow the C++14 ISO C++ language standard [-std=c++14]

Why is the compiler not finding the std::this_thread; namespace? Am I missing a resource? How can I setup up my computer with everything I need using the mingw GNU/GCC compiler?

PS: I am trying to use std::this_thread::sleep_for() from the <thread> library in order pause the program and allow the user to see a displayed message before it is cleared from the standard output in the console.