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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 16:08:52 +0300
Message-ID: <CAA2C=vBGAd9mET8PH8wSL1dgoARKSEKMyYa7Whc0iWky2BaZ3A@mail.gmail.com>
Subject: Re: DXE3 with std::vector
To: djgpp AT delorie DOT com
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>>> Note that additional "-Tdjgpp-x.djl" at the end which screws up
>>> everything.
>>>
>>> What if you use both -T and -Xlinker -T?  IOW, pass -T both to GCC and
>>> to the linker directly?
>>
>> That works with gcc-3.4.6, but not with gcc-2.95: adding -v to command
>> line shows that gcc295 invokes ld with -Tdjgpp.djl -T dxe.ld
>>
>>> If this still doesn't work, can you show the output of "gcc -dumpspecs"
>>> from GCC 2.95?
>>
>> Attached as 295SPECS.TXT  [EDIT: really attached it this time.]
>
> OK, I see the problem now.  So this means people who use GCC 2.95 will
> have to use the previous version of dxe3gen.  In that case, I think
> I'm okay with documenting this and ignoring the problem with GCC 2.95.

I still don't know what other gcc versions would have an issue
with the new version, e.g. gcc 3.0, 3.1, 3.2 or 3.3: I only tested
with 3.4, so I am not 100% comfortable with the patch being in.
(Also see down below.)

>>>>> OK, but still: there should be no problem with having both on the
>>>>> command line, right?
>>>>
>>>> No, no problems. But detecting and correctly using -lgcc was the
>>>> original goal.
>>>
>>> But -L doesn't contradict that goal, does it?
>>
>> I'm trying to understand your question and how you see things:
>> What I'm saying is, needing to add an additional -L/some/path for
>> -lgcc is really counter-intuitive and unexpected. I guess someone
>> has to run gcc -print-libgcc-file-name to manually detect it and
>> than add it to his own command line.
>
> Sure, but we are already talking about someone who does something very
> non-standard.

For the record, -lgcc is not non-standart,

>  I just prefer that we leave those hypothetical people a
> way of keeping their setups, whatever they are, and I think supporting
> DJDIR and DXE_LD_LIBRARY_PATH for adding -L options to the command
> line cannot do any harm to people who use the standard directories,
> right?

Was the discussion in this section only about DXE_LD_LIBRARY_PATH and/
or DJDIR support? (I knew we were speaking about different things :)
No, I am not against restoring DXE_LD_LIBRARY_PATH and/or DJDIR env
vars recognition.

BTW, if I revert the patch and go back to the previous version, -lgcc
problem can be easily worked around when using a makefile, like:
LIBGCCDIR = $(dir $(shell $(CC) -print-libgcc-file-name))
my.dxe:
	dxe3gen -o my.dxe -E _sym -U $(OBJS) -L$(LIBGCCDIR) -lgcc

I even created a documentation patch to dxegen.txi for it. Should we
really keep the patch in, or revert it?