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Subject: [Bug debug/98708] [11 Regression] cxx11-ios_failure-lt.s:36733:
 Error: file number less than one by r11-6755
Date: Sun, 17 Jan 2021 12:40:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98708

--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #9)
> Bootstrap is fine if one uses older binutils.
> The thing is that cxx11-ios_failure* is built by hand first with -g -O2 -=
S,
> then the assembly is modified by a script and then it is assembled, and as
> older assemblers would fail miserably on assembling .s file containing
> .debug_info etc. with -g (-gdwarf-2 passed to assembler), the assembly is
> invoked with -g -O2 -c -g0.
> I really think this should be fixed solely on the assembler side, and
> if needed, we can add a temporary workaround, I guess compiling
> cxx11-ios_failure* with -gno-as-loc-support could fix that.

Assembler option:

 --gdwarf-<N>            generate DWARF<N> debugging information. 2 <=3D <N=
> <=3D 5

both accepts and generates DWARF<N> info.  This decision is made very early=
.=