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From: "Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Date: Sat, 28 Jan 2023 10:55:47 +0300
Message-ID: <CAA2C=vByQZVnfkF_0UX+4p+rcm8uTehwSnM9hSHW-m=Dc4HBtw@mail.gmail.com>
Subject: Re: DXE3 with std::vector
To: djgpp AT delorie DOT com
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>>>  makefile.dxe uses "?=", which AFAICT we never used in the DJGPP
>>>  build tree
>>
>> I can revert that part: Tell me?
>
> If it is not necessary, I think reverting it would be best.

Sure, I can do that.

>>>  the code will no longer heed DXE_LD_LIBRARY_PATH and DJDIR
>>
>> I documented that in the applied patch:
>>
>> https://www.delorie.com/bin/cvsweb.cgi/djgpp/src/docs/kb/wc206.txi
>> https://www.delorie.com/bin/cvsweb.cgi/djgpp/src/docs/kb/wc206.txi.diff?r1=1.15&r2=1.16
>
> Instead of documenting, could we keep the previous behavior?
[...]
>> One can simply use -L/some/path -lfoo (verified that it works)
>
> OK, but can we actually still honor those variables in the new code,
> so that if someone does use them, they could still use their scripts
> and build procedures?
[...]
> I don't know.  DJGPP is a very old project, and it is sometimes used
> in strange and tricky configurations for perhaps unorthodox purposes.
> By removing these variables we could inadvertently break someone's
> project in some rare cases.  Why do that if we could instead keep the
> old behavior intact?

You mean, even if it won't be used, compute the libdir from either
DXE_LD_LIBRARY_PATH or DJDIR and add it as -L ?

>> Change to something like this??
>> /* Allright, now build resulting file */
>
> Something like this.  If it's important to state which programs are
> run, I would say
>
>  /* Allright, now run the compiler to produce object and assembly files */

OK, can do.

>  "?=" was
> introduced in GNU Make 3.77, but someone might be using an older
> version.
[...]
> I don't know.  DJGPP is a very old project, and it is sometimes used
> in strange and tricky configurations for perhaps unorthodox purposes.

With those in mind, what do you think about compatibility with old
gcc versions? I found that at least gcc-2.95 doesn't work after this
patch possibly because it doesn't handle -T dxe.ld on the command
line. (I only tested gcc-3.4.6, maybe older ones don't work either.)