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From: "S.J. Luo" <sjaluo@gmail.com>
Date: Thu, 17 May 2018 01:26:19 +0800
Message-ID: <CAMoHPCY-mp7sxsF0=oO+AKfuJ_hyPxbWVFcU0RB2f46rStac5Q@mail.gmail.com>
Subject: Re: perl-Win32-API package problem
To: cygwin@cygwin.com
Content-Type: text/plain; charset="UTF-8"

Hi Achim,

> >   By checking the gcc compile option, I found there is a gcc option
> > "-fno-stack-protector" provided when I compile this module by myself,
> > while the option is removed when I compile with cygport. If I try
> > manually compiling without this option, the same problem occurs.
>
> I don't know enough of how the stack protector actually is implemented
> to understand why it would work without the protector and stop working
> with.
>
> I'll see if it's possible to remove the option from within cygport, if
> yo I'll have to think about any ramifications that might have.

Thanks for the responding. I just learned that stack protector is
trying to prevent against buffer overflow/stack-corruption based
attacks. It might not be a big issue. A crack-aware program shall
simply avoid this module.

And yes I believe it is complex that how stack protector have
influence on this Perl module. But I think this option is just
necessary. The Makefile.PL explicitly applies -fno-stack-protector
option on non-MSVC compilers with 64bit target:

https://metacpan.org/source/BULKDD/Win32-API-0.84/Makefile.PL#L149

SJ

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