Add examples dir, built with BUILD_EXAMPLES=1 (Makefiles, no CMake equivalent yet).

Move tools/wpa to examples/wpa, and unbreak its build.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88825 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile

@@ -1,6 +1,12 @@
 LEVEL = ../..
 DIRS := include lib tools docs
 
+PARALLEL_DIRS :=
+
+ifeq ($(BUILD_EXAMPLES),1)
+  PARALLEL_DIRS += examples
+endif
+
 include $(LEVEL)/Makefile.common
 
 ifneq ($(PROJ_SRC_ROOT),$(PROJ_OBJ_ROOT))

examples/Makefile

@@ -0,0 +1,14 @@
+##===- examples/Makefile -----------------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+
+PARALLEL_DIRS := wpa
+
+include $(LEVEL)/Makefile.common

examples/wpa/clang-wpa.cpp

@@ -34,7 +34,6 @@ int main(int argc, char **argv) {
     return 0;
 
   TextDiagnosticBuffer DiagClient;
-  Diagnostic Diags(&DiagClient);
 
   for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
     const std::string &InFile = InputFilenames[i];
@@ -42,7 +41,7 @@ int main(int argc, char **argv) {
     std::string ErrMsg;
     llvm::OwningPtr<ASTUnit> AST;
 
-    AST.reset(ASTUnit::LoadFromPCHFile(InFile, Diags, FileMgr, &ErrMsg));
+    AST.reset(ASTUnit::LoadFromPCHFile(InFile, &ErrMsg, &DiagClient));
 
     if (!AST) {
       llvm::errs() << "[" << InFile << "] error: " << ErrMsg << '\n';