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    SubjectRe: Recent changes to sysctl.h breaks glibc
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    Valdis.Kletnieks@vt.edu writes:

    > On Mon, 19 May 2003 17:55:06 MDT, Eric W. Biederman said:
    > > If things must be maintained in concert it is a bug.
    > >
    > > With a fixed ABI people take advantage of new features as they
    > > care for them. And in general to use new features requires new code.
    >
    > And if the kernel headers aren't maintained in concert with the kernel,
    > new userspace code can't reach the new features.
    >
    > Therefor, by your definition, the current situation is a bug.

    Yes, glibc uses kernel headers.

    > Try compiling code that uses futexes on a system that has a kernel that
    > supports them, but kernel-headers that haven't been upgraded to mention them.
    > The kernel has the new code, the userspace has the new code, but gcc will
    > turn around and whinge about the new code because there's a piece missing in
    > between. So people *CANT* take advantage of the new features (unless they
    > do something silly like drag their own foo.h file around where it can get
    > out of sync with reality).

    Or the build against a library that does that. There are not that
    many libraries.

    For a lot of system calls it is actively dangerous to assume dev_t ==
    __kernel_dev_t. As glibc does some cute things in there.

    Eric
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