Give the 'signed/unsigned wchar_t' extension a warning flag, and follow
authorRichard Smith <richard-llvm@metafoo.co.uk>
Mon, 29 Jul 2019 20:00:46 +0000 (20:00 +0000)
committerRichard Smith <richard-llvm@metafoo.co.uk>
Mon, 29 Jul 2019 20:00:46 +0000 (20:00 +0000)
commite8b659fc1ff02354438b1be0ff7016a12ec47603
tree1a358437bff62ff17a5c8967da4d3144c9964078
parenta625da716c8300d2ff9ec2313e7b38892bcfcfcb
Give the 'signed/unsigned wchar_t' extension a warning flag, and follow
GCC 9 in promoting it to an error by default.

llvm-svn: 367255
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/Sema/SemaType.cpp
clang/test/ASTMerge/exprs-cpp/test.cpp
clang/test/Misc/warning-flags.c
clang/test/SemaCXX/wchar_t.cpp