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Date: Thu, 28 May 2015 15:00:35 -0700
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Subject: Re: ANNOUNCE: DJGPP 2.05 beta 1
From: "Louis Santillan (lpsantil AT gmail DOT com)" <djgpp AT delorie DOT com>
To: "djgpp AT delorie DOT com" <djgpp AT delorie DOT com>
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I have a minor 2.04 libc header bug that probably also exists 2.05.  I
just recently ported lz4 [0] to djgpp via Andrew Wu's build-djgpp 2.04
cross compilers [1].  It's currently on the dev branch of lz4 and due
to be included on the next release of master.

In porting, I noticed that using `cc -std=c99` confuses the djgpp
headers such that the main bodies of the headers get nullified for
io.h, fcntl.h, and unistd.h.  This is because `-std=c99` implies
`__STRICT_ANSI__` which is guarded against in those headers and
probably others.  The simple work around is to instead use
`-std=gnu99` which does not imply `__STRICT_ANSI__`  and brings in the
needed function prototypes (isatty(), setmode(), a couple others).


[0] https://github.com/lpsantil/lz4
[1] https://github.com/andrewwutw/build-djgpp/releases

On Thu, May 28, 2015 at 12:11 PM, Ozkan Sezer (sezeroz AT gmail DOT com)
<djgpp AT delorie DOT com> wrote:
> On 5/28/15, Ozkan Sezer <sezeroz AT gmail DOT com> wrote:
>> On 5/4/15, Andris Pavenis (andris DOT pavenis AT iki DOT fi)
>> <djgpp-announce AT delorie DOT com> wrote:
>>> This is announcement of DJGPP 2.05 beta 1
>>>
>>> It has numerous changes since previous DJGPP 2.04 beta 1 release in 2003.
>>> (http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-announce/2003/12/06/22:18:05)
>>> Unfortunately DJGPP v2.04 was never released and old beta version slowly
>>> became almost unusable together with other newer DJGPP packages.
>>>
>>> More information about changes in DJGPP 2.05 beta 1 is available at
>>>
>>>      http://www.delorie.com/djgpp/doc/kb/
>>>
>>> both in sections about changes in 2.04 and 2.05. The same information is
>>> also
>>> available in file info/kb.inf in djdev205.zip
>>>
>>> It needs a lot of testing. Please test it if you have time and/or are
>>> interested in any of the above features. Any level of testing would be
>>> appreciated.
>>
>> Some dxe3gen and dxe3res issues: They are not flexible with relation to
>> development environment:
>>
>> 1. As it seems, they were designed to be run under dos-djgpp not with a
>>  cross-toolchain, i.e. dxe3gen expects 'gcc', 'as', 'ar' and 'ld' to be
>>  djgpp-targeting tools. Well, ld _can_ be changed to be a cross-ld, but
>>  only at compile time. User must have the ability to specify his choice
>>  of tools.
>> - We may make dxe3gen to check environment variables such as DXE_CC,
>>  DXE_AS, DXE_AR and DXE_LD whose values will be the names of the tools
>>  of choice. (Maybe even a common DXE_CROSS_PREFIX to cover all those
>>  at once??)
>> - Command line switches instead? (Environment vars seem better to me.)
>>
>> 2. Strict requirement for DXE_LD_LIBRARY_PATH environment is rude for
>>  cross-compilers. It should be optional ifndef DJGPP
>
> I was miserably wrong about the DXE_LD_LIBRARY_PATH. Noticed that I
> was testing with some stale environment vars set
>
>>
>> 3. dxe3gen sends -T dxe.ld to ld, but the user can't specify a choice
>>  of linker script. (One consequence is when compiling djgpp itself with
>>  old toolchains, the toolchain-provided dxe.ld is used instead of the
>>  one in the source tree.)  Maybe add a '-T' switch to dxe3gen itself??
>
> .. was wrong about the wrong script part too like above.  (Sorry.)
>
>
>>
>> 3. Both dxe3gen and dxe3res expect little endian host.  On the other
>>  hand, their father tool dxegen swaps bytes as required. Needs fixing.
>>
>> Thoughts?
>>