Re: Header files with enums instead of defines?

From: Greg 'groggy' Lehey (grog_at_FreeBSD.org)
Date: 12/23/04

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    Date: Thu, 23 Dec 2004 09:41:08 +1030
To: "M. Warner Losh" <imp@bsdimp.com>

    On Wednesday, 22 December 2004 at 11:48:35 -0700, M. Warner Losh wrote:
    > In message: <41C9C015.7050706@freebsd.org>
    > Scott Long <scottl@freebsd.org> writes:
    >> M. Warner Losh wrote:
    >>> In order to gain the benefits of the enums, errno would need to be an
    >>> enum errno_t or some such. This breaks C++ code that sets errno = 0,
    >>> since you can't assign integers to errno values.
    >>>
    >>> So even if you retained EBOGUS or whatever, this wouldn't work with
    >>> C++. errno has to be an int to work there.
    >>
    >> I think you might have missed that nothing was actually being declared
    >> with the errno_t type, but rather the type was used as a cast for gdb.
    >> It's a neat trick, but still a little cumbersome unless gdb was taught
    >> about it or given some clever macros.
    >
    > Then why bother... Is typing something complex to gdb really better
    > than "grep $number /usr/include/sys/errno.h"?

    No, but getting it automatically is.

    Greg 

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