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Re: [rfa/dwarf-1/doco] dwarfread.c: update doco
- From: Elena Zannoni <ezannoni at redhat dot com>
- To: mec dot gnu at mindspring dot com (Michael Elizabeth Chastain)
- Cc: ezannoni at redhat dot com, gdb-patches at sources dot redhat dot com,jimb at redhat dot com
- Date: Mon, 1 Dec 2003 16:58:55 -0500
- Subject: Re: [rfa/dwarf-1/doco] dwarfread.c: update doco
- References: <20031201214801.AA0574B364@berman.michael-chastain.com>
Michael Elizabeth Chastain writes:
> This patch updates a big comment near the top of dwarfread.c about
> the state of dwarf-1 support in gcc compilers and non-gcc compilers.
>
> I am not suggesting that we obsolete dwarf-1 yet, but we're moving
> in that direction.
>
> Testing: I built gdb, but I didn't run any tests.
>
> Not quite sure this is obvious, so I'll ask. OK to commit?
Approved.
elena
>
> Michael C
>
> 2003-12-01 Michael Chastain <mec.gnu@mindspring.com>
>
> * dwarfread.c: Update documentation on the state of dwarf-1.
>
> Index: dwarfread.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/dwarfread.c,v
> retrieving revision 1.32
> diff -c -3 -p -r1.32 dwarfread.c
> *** dwarfread.c 23 Nov 2003 20:41:16 -0000 1.32
> --- dwarfread.c 1 Dec 2003 21:08:09 -0000
> ***************
> *** 24,65 ****
>
> /*
> If you are looking for DWARF-2 support, you are in the wrong file.
> ! Go look in dwarf2read.c. This file is for the original DWARF.
>
> ! DWARF (also known as DWARF-1) is headed for obsoletion.
>
> ! In gcc 3.2.1, these targets prefer dwarf-1:
>
> ! i[34567]86-sequent-ptx4* # TD-R2
> ! i[34567]86-sequent-sysv4* # TD-R2
> ! i[34567]86-dg-dgux* # obsolete in gcc 3.2.1, to be removed in 3.3
> ! m88k-dg-dgux* # TD-R2
> ! mips-sni-sysv4 # TD-R2
> ! sparc-hal-solaris2* # TD-R2
>
> ! Configurations marked with "# TD-R2" are on Zach Weinberg's list
> ! of "Target Deprecation, Round 2". This is a candidate list of
> ! targets to be deprecated in gcc 3.3 and removed in gcc 3.4.
>
> ! http://gcc.gnu.org/ml/gcc/2002-12/msg00702.html
> !
> ! gcc 2.95.3 had many configurations which prefer dwarf-1.
> ! We may have to support dwarf-1 as long as we support gcc 2.95.3.
> ! This could use more analysis.
> !
> ! DG/UX (Data General Unix) used dwarf-1 for its native format.
> ! DG/UX uses gcc for its system C compiler, but they have their
> ! own linker and their own debuggers.
> !
> ! Takis Psarogiannakopoulos has a complete gnu toolchain for DG/UX
> ! with gcc 2.95.3, gdb 5.1, and debug formats of dwarf-2 and stabs.
> ! For more info, see PR gdb/979 and PR gdb/1013; also:
> !
> ! http://sources.redhat.com/ml/gdb/2003-02/msg00074.html
> !
> ! There may be non-gcc compilers that still emit dwarf-1.
> !
> ! -- chastain 2003-02-04
> */
>
> /*
> --- 24,83 ----
>
> /*
> If you are looking for DWARF-2 support, you are in the wrong file.
> ! Go look in dwarf2read.c. This file is for the original DWARF,
> ! also known as DWARF-1.
>
> ! DWARF-1 is slowly headed for obsoletion.
>
> ! In gcc HEAD 2003-11-29 16:28:31 UTC, no targets prefer dwarf-1.
>
> ! In gcc 3.3.2, these targets prefer dwarf-1:
>
> ! i[34567]86-sequent-ptx4*
> ! i[34567]86-sequent-sysv4*
> ! mips-sni-sysv4
> ! sparc-hal-solaris2*
> !
> ! In gcc 3.2.2, these targets prefer dwarf-1:
> !
> ! i[34567]86-dg-dgux*
> ! i[34567]86-sequent-ptx4*
> ! i[34567]86-sequent-sysv4*
> ! m88k-dg-dgux*
> ! mips-sni-sysv4
> ! sparc-hal-solaris2*
> !
> ! In gcc 2.95.3, these targets prefer dwarf-1:
> !
> ! i[34567]86-dg-dgux*
> ! i[34567]86-ncr-sysv4*
> ! i[34567]86-sequent-ptx4*
> ! i[34567]86-sequent-sysv4*
> ! i[34567]86-*-osf1*
> ! i[34567]86-*-sco3.2v5*
> ! i[34567]86-*-sysv4*
> ! i860-alliant-*
> ! i860-*-sysv4*
> ! m68k-atari-sysv4*
> ! m68k-cbm-sysv4*
> ! m68k-*-sysv4*
> ! m88k-dg-dgux*
> ! m88k-*-sysv4*
> ! mips-sni-sysv4
> ! mips-*-gnu*
> ! sh-*-elf*
> ! sh-*-rtemself*
> ! sparc-hal-solaris2*
> ! sparc-*-sysv4*
> !
> ! Some non-gcc compilers produce dwarf-1:
> !
> ! PR gdb/1179 was from a user with Diab C++ 4.3.
> ! Other users have also reported using Diab compilers with dwarf-1.
> ! On 2003-06-09 the gdb list received a report from a user
> ! with Absoft ProFortran f77 which is dwarf-1.
>
> ! -- chastain 2003-12-01
> */
>
> /*