src/third_party/gperftools-2.0/src/stack_trace_table.cc:138:16: warning: expression which evaluates to zero treated
as a null pointer constant of type 'void *' [-Wnon-literal-null-conversion]
out[idx++] = static_cast<uintptr_t>(0);

src/third_party/gperftools-2.0/src/gperftools/tcmalloc.h:96:38: warning: 'tc_mallinfo' has C-linkage specified, but
returns incomplete type 'struct mallinfo' which could be incompatible with C [-Wreturn-type-c-linkage]
PERFTOOLS_DLL_DECL struct mallinfo tc_mallinfo(void) __THROW;