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Date: Tue, 26 Jul 2011 12:48:58 +0300
Message-ID: <CAA2C=vA3MkR-YF=Z1hvnqKA5ZRRGXh_9BmCGkjpE+d1f1VyExQ@mail.gmail.com>
Subject: Re: DJGPP_MINOR no longer defined?
From: Ozkan Sezer <sezeroz AT gmail DOT com>
To: Andris Pavenis <andris DOT pavenis AT iki DOT fi>
Cc: djgpp AT delorie DOT com
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On Tue, Jul 26, 2011 at 12:38 PM, Andris Pavenis <andris DOT pavenis AT iki DOT fi> wrote:
> On 07/26/2011 12:33 PM, Ozkan Sezer wrote:
>>
>> On Tue, Jul 26, 2011 at 8:51 AM, Ozkan Sezer<sezeroz AT gmail DOT com>  wrote:
>>>
>>> On Tue, Jul 26, 2011 at 8:36 AM, Andris Pavenis<andris DOT pavenis AT iki DOT fi>
>>>  wrote:
>>>>
>>>> On 07/26/2011 01:02 AM, Ozkan Sezer wrote:
>>>>>
>>>>> I use __DJGPP_MINOR__ to understand whether I have djgpp>=2.04 or not.
>>>>> In more recent versions of gcc, specifically starting with gcc>=4.3.0,
>>>>> DJGPP_MINOR is no longer defined and djgpp.ver is no longer generated.
>>>>> Is there a specific reason?  (If this is a well known thing, sorry.)
>>>>
>>>> You have to include sys/version.h or some other header which includes it
>>>> to get DJGPP_MINOR
>>>>
>>>
>>> I know that.  However, gcc-3.x and gcc<= 4.2.x already did that by
>>> itself and defined the macro, which is no longer the case with gcc>=
>>> 4.3.x
>>>
>>
>> Specifically, the t-djgpp change, i.e.:
>>
>> --- t-djgpp~1   2005-05-28 12:36:36.000000000 +0000
>> +++ t-djgpp     2005-05-28 18:58:38.000000000 +0000
>> @@ -1,2 +1,10 @@
>>  # Location of DJGPP's header directory.
>>  NATIVE_SYSTEM_HEADER_DIR=$(DJDIR)/include
>> +
>> +# We should have djgpp.ver before we can compile anything
>> +EXTRA_PARTS += djgpp.ver
>> +# djgpp.ver is needed for compilation, so we need it also here
>> +EXTRA_PASSES += djgpp.ver
>> +
>> +djgpp.ver:
>> +       echo '#include<sys/version.h>'>djgpp.ver
>>
>> ... is no longer being done.  And the old djgpp.h change of:
>>
>>  #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \
>> -  -imacros %s../include/sys/version.h"
>> +  %{!nostdinc:-imacros %sdjgpp.ver}"
>>
>> ... just turned into this:
>>
>> -#define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \
>> -  -imacros %s../include/sys/version.h"
>> +#define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE}"
>>
>> ... eliminating the djgpp.ver mechanism.
>>
>> Any specific reasons?
>>
> Now I remember why I removed it:
>
> including sys/version.h this way did not work properly in GCC
> build process any more (in some cases it was not found at
> all)

Hmm, IIRC, sys/version.h is a djgpp >= 2.02 thing.  Would that
be the reason?  If that is the case, a configury trick maybe???

--
Ozkan