Re: [ECOS] stdint definitions

[Sergei Gavrikov <sergei dot gavrikov at gmail dot com>]

On Wed, 4 Aug 2010, Manuel Borchers wrote:

> Hi all,
>
> I stumbled accros a wired problem today:
>
> I need the ISO standard types uint32_t and the like. So, I found
> stdint.h in the uSTL package. Pulled that one into my config, I get a
> collision of the definitions with sys/bsdtypes.h (because I'm using the
> OpenBSD network stack at the same time) when building the lib/app that
> uses stdint.h. For example:
>
> install/include/sys/bsdtypes.h:37: error: redefinition of typedef âint16_tâ
> install/include/stdint.h:109: error: previous declaration of âint16_tâ was here
>
> I found a statement in the archieves from 2007[1] that the bsdtypes
> defines should be replaces with somthing "better". I checked both files
> and for me the definitions are the same, so that seems to have happened.
>
> Any ideas why the compiler complains here?

Hi Manuel,

One way to manage this do not tweaking the header's sources is to use
preprocessor.

such a collision

    typedef int i32_t;
    typedef int i32_t;

can be "hidden" as

    #define i32_t XXX_i32_t
    typedef int i32_t;
    #undef i32_t

    typedef int i32_t;

So, hack/trick would be (not tested)

    #define HAVE_STDINT_H 1

    #if HAVE_STDINT_H
    #define int8_t BSD_int8_t
    ...
    #define uint64_t BSD_u64_t
    #include <sys/bsdtypes.h>
    #undef int8_t
    ...
    #undef uint64_t
    #else
    #include <sys/bsdtypes.h>
    #endif

    #include <stdint.h>

If the fist header is included is 'stdint.h' then you  can revert the
"hiding".

HTH

Sergei

> Cheers,
> Manuel
>
>
> [1] http://sourceware.org/ml/ecos-discuss/2007-01/msg00171.html
> --
> Manuel Borchers
>
> Web: http://www.matronix.de
> eMail: manuel@matronix.de
>
> --
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