Re: LLVM_IAS=1 and DWARF-4

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On Sat, Jun 13, 2020 at 5:28 AM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:
>
> On Sat, Jun 13, 2020 at 4:17 AM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote:
> >
> > Hi Masahiro,
> >
> > when I build with LLVM_IAS=1 I want to force DWARF-4.
> >
> > CONFIG_DEBUG_INFO_DWARF4=y sets "DEBUG_CFLAGS += -gdwarf-4".
> >
> > I tried:
> >
> > [ Makefile ]
> >
> > ifdef CONFIG_DEBUG_INFO
> > ifdef CONFIG_DEBUG_INFO_SPLIT
> > DEBUG_CFLAGS    += -gsplit-dwarf
> > else
> > DEBUG_CFLAGS    += -g
> > endif
> > ifndef LLVM_IAS
> > KBUILD_AFLAGS    += -Wa,-gdwarf-2
> > endif
> > endif
> > ifdef CONFIG_DEBUG_INFO_DWARF4
> > DEBUG_CFLAGS    += -gdwarf-4
> > ifdef LLVM_IAS
> > KBUILD_AFLAGS    += -Wa,-gdwarf-4
> > endif
> > endif
> >
> > If I set LLVM_IAS=1 ---> CONFIG_DEBUG_INFO_DWARF4=y shall be set automatically.
> >
> > Dunno if "KBUILD_AFLAGS += -Wa,-gdwarf-4" is a good idea.
> >
> > "KBUILD_AFLAGS += -Wa,-gdwarf-2" is known to break with LLVM_IAS=1.
> >
> > I am lost in ifdef-eries...
> >
> > Any cool ideas?
>
>
> Sorry, I am not familiar enough with dwarf
> to understand these flags...
>

Hi Masahiro,

Thanks for your precious time and to be so honest.

Regards,
- Sedat -



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