[rfa/dwarf-1/doco] dwarfread.c: update doco

Elena Zannoni ezannoni@redhat.com
Mon Dec 1 21:58:00 GMT 2003


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
 >   */
 >   
 >   /*



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