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Re: [ANNOUNCEMENT] Updated: gcc-6.3.0-2 (x86/x86_64)(Test)

On 2017-07-28 02:49, Ken Brown wrote:
On 6/29/2017 7:16 AM, JonY wrote:
gcc-6.3.0-2 has been uploaded for Cygwin. It is marked as a test version.


I assume you want some feedback on this.

I've been testing gcc-6.3.0-2 with binutils-2.28-3, on both x86 and x86_64, by rebuilding several of my packages. So far I've built texlive, emacs, and icu. There have been no problems, and all builds have passed their test suites.


gcc 6.3 works fine for me unless I use threads. Any C++ program that uses std::thread (and worked with the previous gcc) will fail. Simple example:

    #include <iostream>
    #include <thread>
    void payload() {
        std::cout << "Thread\n";
    int main() {
        std::cout << "Start\n";
        std::thread t(payload);
        std::cout << "Done\n";

Build and run with:

    g++ thread.cpp -o thread && ./thread || echo Fail

This will print Fail, indicating that the executable errored out. There's no other output. Sorry, I'm not familiar enough with gcc debugging to narrow down the error further.

Code that uses raw pthreads instead of the C++ API works fine.

(I'm running 64-bit Cygwin on Windows 8.1.)

Ross Smith

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