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Date: Tue, 26 Jul 2011 12:38:28 +0300
From: Andris Pavenis <andris DOT pavenis AT iki DOT fi>
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To: Ozkan Sezer <sezeroz AT gmail DOT com>
CC: djgpp AT delorie DOT com
Subject: Re: DJGPP_MINOR no longer defined?
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Reply-To: djgpp AT delorie DOT com

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)