[Bug default/28675] New: whitespace in DWARF template naming confuses libabigail.

[Bug default/28675] New: whitespace in DWARF template naming confuses libabigail.

[woodard at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28675

            Bug ID: 28675
           Summary: whitespace in DWARF template naming confuses
                    libabigail.
           Product: libabigail
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: woodard at redhat dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

Comparing gcc built libabigail.so.0 to llvm built libabigail.so.0 one of the
commonly reported differences is like this:

  [C] 'method const std::vector<abigail::comparison::diff*,
std::allocator<abigail::comparison::diff*> >&
abigail::comparison::corpus_diff::children_nodes() const' at
abg-comparison.h:2325:1 has some indirect sub-type changes:
    return type changed:
      in referenced type 'const std::vector<abigail::comparison::diff*,
std::allocator<abigail::comparison::diff*> >':
        'const std::vector<abigail::comparison::diff*,
std::allocator<abigail::comparison::diff*> >' changed to 'const
std::vector<abigail::comparison::diff *,
std::allocator<abigail::comparison::diff *> >'

The difference is nothing other than white space:
const std::vector<abigail::comparison::diff*,
std::allocator<abigail::comparison::diff*> >
const std::vector<abigail::comparison::diff *,
std::allocator<abigail::comparison::diff *> >

clang puts a space between typename and the * while GCC does not.

This should be a special case that is handled by libabigail. It is not an
actual ABI difference.

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[Bug default/28675] whitespace in DWARF template naming confuses libabigail.

[woodard at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28675

Ben Woodard <woodard at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |27019


Referenced Bugs:

https://sourceware.org/bugzilla/show_bug.cgi?id=27019
[Bug 27019] BUILD metabug
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[Bug default/28675] whitespace in DWARF template naming confuses libabigail.

[woodard at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28675

--- Comment #1 from Ben Woodard <woodard at redhat dot com> ---
This may be a duplicate of 28664 depending on how you frame it. In 28664 it has
to do with the template value parameter type. In this case it is the
representation of certain template type parameter.

One way of considering the bugs is that both have to do with string comparison
of the template typename vs. drilling down into the types being instantiated by
the template. In that case they may be the same bug.

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