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Date: Wed, 26 Oct 2011 00:15:05 +0300
Message-ID: <CAA2C=vD3U+AJy68J7HsJaMoYoTtaJth7vyJvUGsdCBvae58N4w@mail.gmail.com>
Subject: Re: _rdtsc(void) inline function in time.h - cause problem with
 multiple definition during linking
From: Ozkan Sezer <sezeroz AT gmail DOT com>
To: djgpp AT delorie DOT com
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On Tue, Oct 25, 2011 at 8:20 PM, Andris Pavenis <andris DOT pavenis AT iki DOT fi> wrote:
> On 10/25/2011 07:33 PM, Ozkan Sezer wrote:
>>
>> On Tue, Oct 25, 2011 at 7:30 PM, Eli Zaretskii<eliz AT gnu DOT org>  wrote:
>>>>
>>>> From: RayeR<glaux AT centrum DOT cz>
>>>> Date: Tue, 25 Oct 2011 04:02:09 -0700 (PDT)
>>>>
>>>> during compiling large sources I run into troubles with multiple
>>>> _rdtsc(void) definition during linking. The problem is caused when in
>>>> 1st stage is compiled a library that includes time.h and then in 2nd
>>>> stage is compiled main app that also includes time.h Because there is
>>>> _rdtsc() code already in library linker got confused what to use.
>>>>
>>>> Do you think it should be fixed DJGPP time.h header to redefine
>>>>
>>>> extern __inline__ unsigned long long
>>>> _rdtsc(void)
>>>> {
>>>>   unsigned long long result;
>>>>   __asm__ __volatile__ ("rdtsc" : "=A"(result) );
>>>>   return result;
>>>> }
>>>>
>>>> to static?
>>>
>>> Can you show the error messages you get?
>>>
>>> It is strange that you should get any errors at all: an inline
>>> function is like a macro, it disappears without a trace in the
>>> compiled object code, so the linker should not complain, because
>>> there's no symbol corresponding to the function for it to see any
>>> multiple definitions.  There simply should not be any definition at
>>> all.
>>>
>>> Did you perhaps disable inlining, or compiled with some headers that
>>> define away __inline__?
>>>
>>
>> BTW, is the issue with 2.03 or 2.04?  IIRC, 2.04 had fix applied for this.
>
> Yes. But the fix is newer than the beta version from djgpp/beta/v2 as far as
> I remember
>
> Perhaps it could be good time to release a new beta sometime.
>

That is a good idea.  I've been using the snapshot from 2011-10-02
with success.  I can provide packages (cross-built on linux) if required.

> Andris
>
>

--
O.S.