[PATCH] D27140: Allow clang to write compilation database records

[Joerg Sonnenberger via Phabricator via cfe-commits]

joerg updated this revision to Diff 79482.
joerg added a comment.

Move implementation into the Clang class, keep track of the raw_fd_stream. This avoids reopening it on multiple inputs and removes the need for append mode. Short circuit the function when -### is present. Add proper diagnostics on open failure.

Still not completely happy with the place and the associated need for the mutable member.


https://reviews.llvm.org/D27140

Files:
  docs/JSONCompilationDatabase.rst
  include/clang/Basic/DiagnosticDriverKinds.td
  include/clang/Driver/Options.td
  lib/Driver/Tools.cpp
  lib/Driver/Tools.h

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