Fuzzer: Fix library dependencies.

Newer versions of libstdc++ (4.9+), as well as libc++, depend directly on
libpthread from the standard library headers, so libfuzzer needs to declare
a standard library dependency.

llvm-svn: 255745

llvm/lib/Fuzzer/CMakeLists.txt

@@ -17,10 +17,16 @@ if( LLVM_USE_SANITIZE_COVERAGE )
   add_library(LLVMFuzzerNoMain STATIC
     $<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
     )
+  if( HAVE_LIBPTHREAD )
+    target_link_libraries(LLVMFuzzerNoMain pthread)
+  endif()
   add_library(LLVMFuzzer STATIC
     FuzzerMain.cpp
     $<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
     )
+  if( HAVE_LIBPTHREAD )
+    target_link_libraries(LLVMFuzzer pthread)
+  endif()
 
   if( LLVM_INCLUDE_TESTS )
     add_subdirectory(test)