[PATCH] D32176: Add #pragma clang attribute support for the external_source_symbol attribute

[Alex Lorenz via Phabricator via cfe-commits]

arphaman created this revision.

Right now the `external_source_symbol` attribute isn't supported by `#pragma clang attribute` for the following two reasons:

- The `Named` attribute subject isn't supported by TableGen.
- There was no way to specify a subject match rule for `#pragma clang attribute` that could operate on a set of attribute subjects (e.g. the ones that derive from `NamedDecl`).

This patch fixes the two issues and thus adds `external_source_symbol` support to `#pragma clang attribute`,


Repository:
  rL LLVM

https://reviews.llvm.org/D32176

Files:
  include/clang/Basic/Attr.td
  lib/Sema/SemaDeclAttr.cpp
  test/Misc/pragma-attribute-supported-attributes-list.test
  utils/TableGen/ClangAttrEmitter.cpp

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