Chandler Carruth cb3b5a483f Wire up '-Wignored-qualifiers' to the warning on 'const' in 'const int f()'. ...

This flag and warning match GCC semantics. Also, move it to -Wextra as this is
a largely cosmetic issue and doesn't seem to mask problems. Subsequent fixes to
the tests which no longer by default emit the warning. Added explicit test
cases for both C and C++ behavior with the warning turned on.

llvm-svn: 108325

2010-07-14 06:36:18 +00:00

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