update two comments as suggested on https://reviews.llvm.org/D46843

llvm-svn: 332370

clang/tools/clang-fuzzer/CMakeLists.txt

@@ -9,8 +9,7 @@ elseif(LLVM_USE_SANITIZE_COVERAGE)
   unset(DUMMY_MAIN)
 endif()
 
-# Hack to bypass LLVM's cmake sources check and allow multiple libraries and
-# executables from this directory.
+# Needed by LLVM's CMake checks because this file defines multiple targets.
 set(LLVM_OPTIONAL_SOURCES
   ClangFuzzer.cpp
   DummyClangFuzzer.cpp

clang/tools/clang-fuzzer/proto-to-cxx/CMakeLists.txt

@@ -1,8 +1,7 @@
 set(LLVM_LINK_COMPONENTS ${LLVM_TARGETS_TO_BUILD})
 set(CMAKE_CXX_FLAGS ${CXX_FLAGS_NOFUZZ})
 
-# Hack to bypass LLVM's CMake source checks so we can have both a library and
-# an executable built from this directory.
+# Needed by LLVM's CMake checks because this file defines multiple targets.
 set(LLVM_OPTIONAL_SOURCES proto_to_cxx.cpp proto_to_cxx_main.cpp)
 
 add_clang_library(clangProtoToCXX proto_to_cxx.cpp