folly: fix make_optional compliation issue with gnu++17

Summary:
This clashes with std::make_optional with -std=gnu++17 giving:
  call of overloaded 'make_optional(std::__cxx11::basic_string<char>)' is ambiguous

Reviewed By: yfeldblum

Differential Revision: D6780579

fbshipit-source-id: fea8c76869e4d9b744fc3182379328a91879b1d2

diff --git a/folly/system/ThreadName.cpp b/folly/system/ThreadName.cpp
index ae433cc815b4c40f7c15339df6fb441fd6156970..d661ad020ab68fb3bd8733ecc6b701b9805fd0a4 100644 (file)
--- a/folly/system/ThreadName.cpp
+++ b/folly/system/ThreadName.cpp
@@ -88,7 +88,7 @@ Optional<std::string> getThreadName(std::thread::id id) {
   if (pthread_getname_np(stdTidToPthreadId(id), buf.data(), buf.size()) != 0) {
     return Optional<std::string>();
   }
-  return make_optional(std::string(buf.data()));
+  return folly::make_optional(std::string(buf.data()));
 #else
   return Optional<std::string>();
 #endif