Interop: use new target-clangxx for building C++ code

This enables control over the C++ flags used during testing for the C++
interop from a single location rather than having to alter all the
tests.

Author: compnerd

test/Interop/Cxx/extern-var/extern-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -c %S/Inputs/extern-var.cpp -I %S/Inputs -o %t/extern-var.o
+// RUN: %target-clangxx -c %S/Inputs/extern-var.cpp -I %S/Inputs -o %t/extern-var.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/extern-var %t/extern-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/extern-var
 // RUN: %target-run %t/extern-var

test/Interop/Cxx/operators/member-out-of-line.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -std=c++11 -c %S/Inputs/member-out-of-line.cpp -I %S/Inputs -o %t/member-out-of-line.o
+// RUN: %target-clangxx -c %S/Inputs/member-out-of-line.cpp -I %S/Inputs -o %t/member-out-of-line.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/member-out-of-line %t/member-out-of-line.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/member-out-of-line
 // RUN: %target-run %t/member-out-of-line

test/Interop/Cxx/operators/non-member-out-of-line.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -std=c++11 -c %S/Inputs/non-member-out-of-line.cpp -I %S/Inputs -o %t/non-member-out-of-line.o
+// RUN: %target-clangxx -c %S/Inputs/non-member-out-of-line.cpp -I %S/Inputs -o %t/non-member-out-of-line.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/non-member-out-of-line %t/non-member-out-of-line.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/non-member-out-of-line
 // RUN: %target-run %t/non-member-out-of-line

test/Interop/Cxx/reference/reference.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -std=c++11 -c %S/Inputs/reference.cpp -I %S/Inputs -o %t/reference.o
+// RUN: %target-clangxx -c %S/Inputs/reference.cpp -I %S/Inputs -o %t/reference.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/reference %t/reference.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/reference
 // RUN: %target-run %t/reference

test/Interop/Cxx/static/constexpr-static-member-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -std=c++11 -c %S/Inputs/static-member-var.cpp -I %S/Inputs -o %t/static-member-var.o
+// RUN: %target-clangxx -c %S/Inputs/static-member-var.cpp -I %S/Inputs -o %t/static-member-var.o
 // NOTE: we must use `-O` here to ensure that the constexpr value is inlined and no undefined reference remains.
 // RUN: %target-build-swift -O %s -I %S/Inputs -o %t/statics %t/static-member-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics

test/Interop/Cxx/static/inline-static-member-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -c %S/Inputs/inline-static-member-var.cpp -I %S/Inputs -o %t/inline-static-member-var.o
+// RUN: %target-clangxx -c %S/Inputs/inline-static-member-var.cpp -I %S/Inputs -o %t/inline-static-member-var.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/inline-static-member-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics 2&>1

test/Interop/Cxx/static/static-local-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -c %S/Inputs/static-local-var.cpp -I %S/Inputs -o %t/static-local-var.o
+// RUN: %target-clangxx -c %S/Inputs/static-local-var.cpp -I %S/Inputs -o %t/static-local-var.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-local-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics

test/Interop/Cxx/static/static-member-func.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -c %S/Inputs/static-member-func.cpp -I %S/Inputs -o %t/static-member-func.o
+// RUN: %target-clangxx -c %S/Inputs/static-member-func.cpp -I %S/Inputs -o %t/static-member-func.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-member-func.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics

test/Interop/Cxx/static/static-member-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -std=c++11 -c %S/Inputs/static-member-var.cpp -I %S/Inputs -o %t/static-member-var.o
+// RUN: %target-clangxx -c %S/Inputs/static-member-var.cpp -I %S/Inputs -o %t/static-member-var.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-member-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics

test/Interop/Cxx/static/static-var.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-clang -c %S/Inputs/static-var.cpp -I %S/Inputs -o %t/static-var.o
+// RUN: %target-clangxx -c %S/Inputs/static-var.cpp -I %S/Inputs -o %t/static-var.o
 // RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics