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    SubjectRe: asm-generic/unistd.h and glibc use of NR_ipc
    On Tuesday, September 28, 2010 09:05:13 Chris Metcalf wrote:
    > On 9/28/2010 4:40 AM, Arnd Bergmann wrote:
    > > Chris Metcalf is using the generic unistd.h file on the tile architecture
    > > and has a glibc port that should be easily portable to all future
    > > architectures. There are a few of them getting ready to be merged
    > > now (c6x, lm32, nios2, and some people have contacted me privately
    > > for architectures I cannot name).

    c6x lacks a MMU, so i dont see how it could possibly use glibc. same for
    lm32. nios2 at least has an optional MMU, so it'd be usable some of the time.
    so no, i dont see a generic unistd.h glibc port being useful for them.

    > One question for the libc folks is nomenclature. For now I'm using
    > "sysdeps/unix/sysv/linux/generic" to hold the sources that are meant to be
    > used for any architecture that uses Arnd's <asm-generic/unistd.h> along
    > with the other asm-generic headers, e.g. <asm-generic/stat.h>. I've
    > appended a list of the files that I've put in that directory to this
    > email. Many of them are there just for handling missing "standard"
    > syscalls in <asm-generic/unistd.h>; for example the "readlink" syscall
    > becomes "readlinkat" in dl-origin.c, etc.
    > Is this the best name to use for the directory, though? In particular,
    > glibc already uses "sysdeps/generic" in a slightly special sense to provide
    > the fallback if no sysdeps override is available for a given file. But the
    > Linux naming of "generic unistd.h" is pretty commonplace, so I assume that
    > in the "linux/" hierarchy it is reasonably clear what that subdirectory
    > means.

    i think "generic" in the context of "linux" is ok, but about the only real
    answer you'd get is if it comes from drepper/roland.
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