[PATCH 0/3] Support DWARF 5 .debug_sup section

[Tom Tromey <tom@tromey.com>]

This is a refresh of a patch I sent a long time ago and then forgot
about:

https://sourceware.org/pipermail/gdb-patches/2021-February/176508.html

It adds support for the DWARF 5 .debug_sup section and related forms.

See patch #3 for testing.  I regression tested this on x86-64 Fedora
40, comparing the new "dwz -5" results against a "dwz -m" baseline.

There are a handful of regressions, due to the decision about build-id
that's noted in patch #2.

Signed-off-by: Tom Tromey <tom@tromey.com>
---
Tom Tromey (3):
      Remove 'read' call from dwz_file::read_string
      Handle DWARF 5 separate debug sections
      Add "-5" flag to cc-with-tweaks

 gdb/contrib/cc-with-tweaks.sh                 |   5 +-
 gdb/dwarf2/attribute.c                        |   5 +-
 gdb/dwarf2/attribute.h                        |  14 +-
 gdb/dwarf2/cooked-indexer.c                   |   4 +-
 gdb/dwarf2/die.c                              |   3 +
 gdb/dwarf2/dwz.c                              | 193 +++++++++++++++++++++-----
 gdb/dwarf2/dwz.h                              |  25 ++--
 gdb/dwarf2/macro.c                            |   1 +
 gdb/dwarf2/read.c                             |  19 ++-
 gdb/dwarf2/read.h                             |   8 +-
 gdb/testsuite/boards/cc-with-dwz-5.exp        |  28 ++++
 gdb/testsuite/gdb.dwarf2/dwzbuildid.exp       | 159 +--------------------
 gdb/testsuite/gdb.dwarf2/dwzbuildid.tcl       | 184 ++++++++++++++++++++++++
 gdb/testsuite/gdb.dwarf2/dwzbuildid5.exp      |  17 +++
 gdb/testsuite/gdb.dwarf2/dwznolink.exp        |   2 +-
 gdb/testsuite/gdb.dwarf2/no-gnu-debuglink.exp |   2 +-
 gdb/testsuite/lib/dwarf.exp                   |  18 +++
 17 files changed, 469 insertions(+), 218 deletions(-)
---
base-commit: df1ed5c0d4935c62b8951fd83a1e37e775ba90a5
change-id: 20250323-dwz-dwarf-5-v2-7d84ad21b045

Best regards,
-- 
Tom Tromey <tom@tromey.com>