Fix the build of the include-fixer plugin for some shared cmake builds and MSVC.

- The include fixer plugin does not directly depend on pthread, but can
pick up pthread references transitively through inlining. Just add
pthreads to the linked libs unconditionally.
- MSVC emits bogus warnings when including <future> and building without
exceptions. Blacklist the warnings explicitly.

llvm-svn: 291892

clang-tools-extra/include-fixer/SymbolIndexManager.h

@@ -13,8 +13,19 @@
 #include "SymbolIndex.h"
 #include "find-all-symbols/SymbolInfo.h"
 #include "llvm/ADT/StringRef.h"
+
+#ifdef _MSC_VER
+// Disable warnings from ppltasks.h transitively included by <future>.
+#pragma warning(push)
+#pragma warning(disable:4530)
+#endif
+
 #include <future>
 
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 namespace clang {
 namespace include_fixer {
 

clang-tools-extra/include-fixer/plugin/CMakeLists.txt

@@ -9,4 +9,5 @@ add_clang_library(clangIncludeFixerPlugin
   clangParse
   clangSema
   clangTooling
+  ${PTHREAD_LIB}
   )