[PATCH] D52296: [Clang] - Add -gsingle-file-split-dwarf option.

[George Rimar via Phabricator via cfe-commits]

grimar created this revision.
grimar added reviewers: dblaikie, echristo, probinson, compnerd.
Herald added subscribers: JDevlieghere, aprantl.

The DWARF5 specification says(Appendix F.1):

"The sections that do not require relocation, however, **can be written to the relocatable object (.o) file but ignored by the
 linker** or they can be written to a separate DWARF object (.dwo) file that need not be accessed by the linker."

The first part describes a single file split DWARF feature and there is no way to trigger this behavior atm I think. 
Fortunately, no many changes are required to keep *.dwo sections in a .o, the patch does that.

Not sure who is an appropriate reviewer for that.


https://reviews.llvm.org/D52296

Files:
  include/clang/Driver/CC1Options.td
  include/clang/Driver/Options.td
  include/clang/Frontend/CodeGenOptions.h
  lib/CodeGen/BackendUtil.cpp
  lib/Driver/ToolChains/Clang.cpp
  lib/Driver/ToolChains/CommonArgs.cpp
  lib/Driver/ToolChains/CommonArgs.h
  lib/Driver/ToolChains/Gnu.cpp
  lib/Driver/ToolChains/MinGW.cpp
  lib/Frontend/CompilerInvocation.cpp
  test/CodeGen/split-debug-single-file.c
  test/Driver/split-debug.c
  test/Driver/split-debug.s

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