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To: ecos-discuss@ecos.sourceware.org
From: Grant Edwards <grant.b.edwards@gmail.com>
Date: Tue, 25 Jun 2013 17:20:00 -0000
Message-ID: <kqcjfk$h6m$1@ger.gmane.org>
References: <kqchr4$1go$1@ger.gmane.org>
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Subject: [ECOS] Re: Why does #include <cyg/io/eth/eth_drv> define a bunch of time-related symbols?
X-SW-Source: 2013-06/txt/msg00024.txt.bz2

On 2013-06-25, Grant Edwards <grant.b.edwards@gmail.com> wrote:

> I'm working on a new Ethernet driver.  eCos kernel/libs (including the
> new drive) build fine. But, when I try to link an application I get a
> bunch of errors because some time-related functions are defined twice.
> They're defined in libtarget where they're supposed to be, but they're
> also getting defined in the object file for my Ethernet driver [and I
> can't figure out why].

It's cause by compiling the driver with the -std=gnu99 flag.  I a big
fan of limiting the scope of variables and like to use this sort of
construct:

  for (int i=0; i<whatever; ++i)
    {
      // "i" is only visible inside this block    
    }

It appears that eCos header files don't work right when you compile
with C99 semantics...
    
-- 
Grant Edwards               grant.b.edwards        Yow! I just forgot my whole
                                  at               philosophy of life!!!
                              gmail.com            


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