Split -Wunused-variable warning.

With r190382, -Wunused-variable warns about unused const variables when
appropriate. For codebases that use -Werror, this poses a problem as
existing unused const variables need to be cleaned up first. To make the
transistion easier, this patch splits -Wunused-variable by pulling out
an additional -Wunused-const-variable (by default activated along with
-Wunused-variable).

llvm-svn: 190508

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/no-warn-unused-const-variables.cpp b/clang/test/SemaCXX/no-warn-unused-const-variables.cpp
new file mode 100644
index 00000000000..c146ca04f83
--- /dev/null
+++ b/clang/test/SemaCXX/no-warn-unused-const-variables.cpp
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -fsyntax-only -Wunused-variable -Wno-unused-const-variable -verify %s
+
+namespace {
+  int i = 0; // expected-warning {{unused variable 'i'}}
+  const int j = 0;;
+}