[Bug 49138] New: winegcc: argc and argv arguments of main() get corrupted

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49138

Bug ID: 49138
           Summary: winegcc: argc and argv arguments of main() get
                    corrupted
           Product: Wine
           Version: 5.7
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tools
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I first came across this issue with winelib compilation in Wine 5.7 while I was
working on yabridge, a Wine VST bridge. The issue still persists on the latest
commit in the Wine repository as I'm writing this (commit bf1abba, with the
release of Wine 5.8). I'm not exactly sure what is going on, but the issue can
be reproduced as follows:

#include <iostream>

int main(int argc, char* argv[]) {
        std::cout << "argc = " << argc << std::endl;
        std::cout << "argv[0] = " << argv[0] << std::endl;
    }

If you compile the above (or the C-equivalent) with `wineg++ test.cpp -o test`
and run test.exe, then at least on my system it will always print 70624 as the
value of argc and some uninitialized looking data for argv[0]. This happens
regardless of whether the program receives any command line arguments or not.

Winelib applications compiled with the toolchain that comes with Wine 5.6 can
be
run without problems under Wine 5.7 or 5.8. The winelib compilation issue with
Wine 5.7+ exists on Ubuntu 18.04, Ubuntu 20.04, Arch Linux and Manjaro, both
when using the distro provided packages and when building Wine from source.