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From: "woodard at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/28675] New: whitespace in DWARF template naming
 confuses libabigail.
Date: Wed, 08 Dec 2021 23:44:04 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28675

            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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