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From: "Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Date: Thu, 10 Dec 2020 19:25:25 +0300
Message-ID: <CAA2C=vBbp1jtT1TQ8gbYv9gW=TaNhVM4LtYLBmuTHB9yeOa+sA@mail.gmail.com>
Subject: Re: Difficulties compiling libc from repository using gcc 10.N.0
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On 12/10/20, Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via
djgpp AT delorie DOT com] <djgpp AT delorie DOT com> wrote:
> Am 10.12.2020 12:55, schrieb Ozkan Sezer (sezeroz AT gmail DOT com) [via
> djgpp AT delorie DOT com]:
>>> C:/DJGPP-2.05/BIN/make.exe -C common
>>> gcc ... -c dbgcom.c
>>> dbgcom.c: Assembler messages:
>>> dbgcom.c:1342: Error: symbol `.Ldoes_not_has_read_right' is already
>>> defined
>>> dbgcom.c:1346: Error: symbol `.Ldoes_not_has_write_right' is already
>>> defined
>> [...]
>>> I have tried this using gcc1010 and gcc1020.  Both fails.  If I use
>>> gcc920
>>> everything works fine.  In all cases bnu234b has been used and no other
>>> one
>>> has been tried.
>>
>> Some kind of gcc bug? How does the asm output of gcc look like?
>
> I have attached both assembly files, one produced by 9.2.0 and the other
> one
> produced by 10.2.0.  The offending code starts at 1337 where some asm code
> is
> inserted.  For some reason the labels used repeats a couple of times in the
> assembler output.

gcc-10 -S format changed? It's a pain to read and impossible to
diff against gcc-9 version.

Nevertheless, gcc-10 seems to have inlined invalid_sel_addr()
which has the asm, into read_sel_addr() hence the duplicated
labels.