Fix for libc++ (std::basic_ostringstream<char> is not a part of C++ standard).
Upstream bug: https://github.com/ROCm/ROCdbgapi/issues/18
--- a/src/os_driver.cpp
+++ b/src/os_driver.cpp
@@ -1006,12 +1006,12 @@ public:
   template <typename T, std::enable_if_t<!std::is_pointer_v<T>, int> = 0>
   void write (const T &v)
   {
-    m_stream.write (reinterpret_cast<const std::byte *> (&v), sizeof (T));
+    m_stream.write (reinterpret_cast<const char *> (&v), sizeof (T));
   }
 
   void write (const std::vector<std::byte> &v)
   {
-    m_stream.write (reinterpret_cast<const std::byte *> (v.data ()),
+    m_stream.write (reinterpret_cast<const char *> (v.data ()),
                     v.size ());
   }
 
@@ -1026,7 +1026,7 @@ public:
 
     auto str = m_stream.str ();
     note.size = str.size ();
-    auto buffer = amd::dbgapi::allocate_memory<std::byte> (note.size);
+    auto buffer = amd::dbgapi::allocate_memory<char> (note.size);
     std::copy (str.begin (), str.end (), buffer.get ());
     note.data = buffer.release ();
 
@@ -1034,7 +1034,7 @@ public:
   }
 
 private:
-  std::basic_ostringstream<std::byte> m_stream;
+  std::basic_ostringstream<char> m_stream;
 };
 
 }; /* anonymous namespace.  */