<div dir="ltr">I built and installed pp-trace from the extra clang tools, running the tool against some of clangs own header files I get #include errors, here's a sample output.<div><br></div><div><div> ./pp-trace /usr/local/llvm40/include/clang/Sema/AttributeList.h</div><div>In file included from /usr/local/llvm40/include/clang/Sema/AttributeList.h:18:</div><div>In file included from /usr/local/llvm40/include/clang/Basic/SourceLocation.h:18:</div><div>In file included from /usr/local/llvm40/include/clang/Basic/LLVM.h:22:</div><div>In file included from /usr/local/llvm40/include/llvm/Support/Casting.h:19:</div><div>/usr/local/llvm40/include/llvm/Support/type_traits.h:17:10: fatal error: 'type_traits' file not found</div><div>#include <type_traits></div><div>         ^~~~~~~~~~~~~</div><div>1 error generated.</div><div>Error while processing /usr/local/llvm40/include/clang/Sema/AttributeList.h.</div></div><div><br></div><div><br></div><div>Why would the <type_traits> not be found?</div><div><br>Best</div></div>