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Subject: Re: DXE3 with std::vector
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From: "J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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On 2023-01-28 18:23, Eli Zaretskii (eliz AT gnu DOT org) [via djgpp AT delorie DOT com] wrote:
>> Date: Sat, 28 Jan 2023 18:01:44 +0100
>> From: "J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
>>
>>>
>>> I don't really like this "solution", it just makes it the user's problem.
>>>
>>> How likely is it that someone uses the latest version of dxe3gen, but is
>>> somehow stuck with such an ancient (nearly 25 years old) version of gcc?  At
>>> some point you'll just have to say, for gcc < X, use dxe3gen Y.
>>>
>>> For DXE_LD_LIBRARY_PATH, that can be added easily as -L dir, and won't break
>>> anything.  But not having this set should not be an error.
>>>
>>> For DJDIR, there is only one valid place it can point to, and gcc already knows
>>> where to find it.  I don't think a native gcc even works without DJDIR set.  So
>>> it doesn't make sense to also parse it in dxe3gen.
>>
>> Also, with removing DXE_LD_LIBRARY_PATH, the concern was that it could break
>> existing makefiles.  But now the accepted solution is... to break existing
>> makefiles?  That logic is hard to follow.
> 
> If you can propose a patch that caters to your use case without
> breaking the "traditional" one, please do, and let's take it from
> there.
> 
> GCC 2.95 is not a blocking problem, from my POV.  But I don't want to
> lose support for DJDIR and DXE_LD_LIBRARY_PATH, because someone could
> have set them in their build procedures for some reason, and have them
> point to some strange places that neither me nor you can imagine.
> 
> Are there any fundamental problems that would preclude invoking GCC
> instead of ld (so that your case is supported), but still have the -L
> switch added to the GCC command line, whose argument is derived from
> DXE_LD_LIBRARY_PATH or from DJDIR if those are set?  IOW, can we have
> the code work as you wanted when these two variables aren't set, but
> add the additional -L switch when they are?

Sure, that should be possible.  Starting from the patch I submitted earlier,
simply adding DXE_LD_LIBRARY_PATH via -L will achieve that.

For DJDIR, again, having it set to anything other than the djgpp install
location is *always* user error.  Many things rely on this, and to me it
doesn't seem very useful to support invalid configurations in dxe3gen.