[Bug default/20369] Support DW_TAG_type_unit

["woodard at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20369

Ben Woodard <woodard at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |woodard at redhat dot com

--- Comment #16 from Ben Woodard <woodard at redhat dot com> ---
I just wanted to add a comment that --compress-debug-sections and DWZ are quite
different in their approaches. --compress-debug-sections simply uses zlib to
compress the DWARF while dwz actually replaces duplicated DWARF information
coming from different compilation units with references to each other. This is
particularly effective when applied to templated C++ code.

In theory once dwz has been applied the DWARF could even be compressed further
with zlib but I've never heard of anyone attempting this and I would be
surprised if it worked.

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