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From: Yuxin Ren <ryx@gwmail.gwu.edu>
To: musl@lists.openwall.com
Subject: Re: Why musl define PAGE_SIZE
Date: Fri, 11 Sep 2015 15:53:38 -0400	[thread overview]
Message-ID: <CAAKbDrcuWL5HpWiZ1Dwmhtqj6QRbzAsPeuCeQDsq8mQo8jreTw@mail.gmail.com> (raw)
In-Reply-To: <20150911194359.GB1965@newbook>

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But I do not think other libcs define PAGE_SIZE, such as glibc or diet-libc.
Is that true?

Thanks

On Fri, Sep 11, 2015 at 3:44 PM, Isaac Dunham <ibid.ag@gmail.com> wrote:

> On Fri, Sep 11, 2015 at 03:28:52PM -0400, Yuxin Ren wrote:
> > Hi,
> >
> > I found in the bits/limits.h file, musl defines PAGE_SIZE macro .
> > I think this macro is always defined by operating system, not libc.
> >
> > Why does musl define this marco?
>
> It's required to be in limits.h, which has to be provided by libc for a
> full implementation.
> Hypothetically, we could get it from the Linux headers.
> But the Linux headers can and sometimes do introduce definitions and
> structs that violate the header namespaces, resulting in collisions
> (ie, kernel header defines struct foo, application defines struct foo
> without including any headers that *should* define it, application fails
> to compile.)
>
> HTH,
> Isaac Dunham
>

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  reply	other threads:[~2015-09-11 19:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-11 19:28 Yuxin Ren
2015-09-11 19:44 ` Isaac Dunham
2015-09-11 19:53   ` Yuxin Ren [this message]
2015-09-11 20:10   ` Rich Felker
2015-09-11 20:01 ` Rich Felker

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