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Author SHA1 Message Date
Eric Christopher 0819816887 Attempt to migrate default dwarf version to 4 for linux. 
llvm-svn: 189823
 2013-09-03 16:10:12 +00:00
Manman Ren 38db092083 Debug Info: set default to gdwarf-2 for Darwin. 
Darwin systems currently do not support dwarf version 3 or above. When we are
ready, we can bump the default to gdwarf-4 for Darwin.

For other systems, the default is dwarf version 3, if everything goes smoothly,
we can bump the version to 4.

rdar://13591116

llvm-svn: 185483
 2013-07-02 23:15:25 +00:00
Manman Ren 9691f7fa35 Debug Info: support for gdwarf-2 gdwarf-3 gdwarf-4 
These options will add a module flag with name "Dwarf Version".
The behavior flag is currently set to Warning, so when two values disagree,
a warning will be emitted.

llvm-svn: 184276
 2013-06-19 01:46:49 +00:00