[RFC,0/2] Incomplete enum support

  Incomplete enums are heavily used in the Linux kernel source as part
of interface specifications.

This code appears to work, but it is lightly tested and unreviewed.

It also duplicates a lot of code that is used for incomplete class and
union types. There may be a significant opportunity for refactoring
and shared code and data.

Giuliano Procida (2):
  Support declaration-only enums.
  Add tests for declaration-only enums.

 include/abg-comp-filter.h                     |   7 +
 include/abg-comparison.h                      |   7 +
 include/abg-fwd.h                             |  26 +-
 include/abg-ir.h                              |  23 ++
 src/abg-comp-filter.cc                        |  78 ++++-
 src/abg-comparison.cc                         |  21 +-
 src/abg-default-reporter.cc                   |  34 +-
 src/abg-dwarf-reader.cc                       | 308 +++++++++++++++++-
 src/abg-ir.cc                                 | 235 ++++++++++++-
 tests/data/Makefile.am                        |   5 +
 .../test-decl-enum-report.txt                 |  17 +
 .../test-abidiff-exit/test-decl-enum-v0.c     |   5 +
 .../test-abidiff-exit/test-decl-enum-v0.o     | Bin 0 -> 3048 bytes
 .../test-abidiff-exit/test-decl-enum-v1.c     |   5 +
 .../test-abidiff-exit/test-decl-enum-v1.o     | Bin 0 -> 3048 bytes
 tests/test-abidiff-exit.cc                    |   9 +
 16 files changed, 754 insertions(+), 26 deletions(-)
 create mode 100644 tests/data/test-abidiff-exit/test-decl-enum-report.txt
 create mode 100644 tests/data/test-abidiff-exit/test-decl-enum-v0.c
 create mode 100644 tests/data/test-abidiff-exit/test-decl-enum-v0.o
 create mode 100644 tests/data/test-abidiff-exit/test-decl-enum-v1.c
 create mode 100644 tests/data/test-abidiff-exit/test-decl-enum-v1.o