diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
index a165506f4..e7536edab 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -1450,6 +1450,46 @@ fail:
   return NULL;
 }
 
+/* Get profile name from the subset_list.  */
+
+const char *
+riscv_subset_list::get_profile_name () const
+{
+  const char *best_profile = NULL;
+  int max_ext_count = -1;
+
+  for (int i = 0; riscv_profiles_table[i].profile_name != nullptr; ++i)
+    {
+      riscv_subset_list *subset_list = riscv_subset_list::parse (
+      riscv_profiles_table[i].profile_string, NULL);
+      if (!subset_list)
+	continue;
+      if (subset_list->xlen () == this->xlen ())
+	{
+	  int ext_count = 0;
+	  bool all_found = true;
+	  for (riscv_subset_t *p = subset_list->m_head; p != NULL;
+		p = p->next, ++ext_count)
+	    {
+	      if (!this->lookup (p->name.c_str (),
+			p->major_version,
+			p->minor_version))
+		{
+		  all_found = false;
+		  break;
+		}
+	    }
+	  if (all_found && ext_count > max_ext_count)
+	    {
+	      max_ext_count = ext_count;
+	      best_profile = riscv_profiles_table[i].profile_name;
+	    }
+	}
+      delete subset_list;
+    }
+  return best_profile;
+}
+
 /* Clone whole subset list.  */
 
 riscv_subset_list *
diff --git a/gcc/config/riscv/riscv-c.cc b/gcc/config/riscv/riscv-c.cc
index 4fc052817..d497326e0 100644
--- a/gcc/config/riscv/riscv-c.cc
+++ b/gcc/config/riscv/riscv-c.cc
@@ -165,6 +165,15 @@ riscv_cpu_cpp_builtins (cpp_reader *pfile)
   if (!subset_list)
     return;
 
+  /* Define profile macro if a profile was used.  */
+  const char *profile_name = subset_list->get_profile_name ();
+  if (profile_name)
+    {
+      char *profile_macro = (char *)alloca (strlen (profile_name) + 10);
+      sprintf (profile_macro, "__riscv_%s", profile_name);
+      builtin_define (profile_macro);
+    }
+
   size_t max_ext_len = 0;
 
   /* Figure out the max length of extension name for reserving buffer.   */
diff --git a/gcc/config/riscv/riscv-subset.h b/gcc/config/riscv/riscv-subset.h
index 4cd860fee..1887ed7cc 100644
--- a/gcc/config/riscv/riscv-subset.h
+++ b/gcc/config/riscv/riscv-subset.h
@@ -105,6 +105,8 @@ public:
 
   unsigned xlen () const {return m_xlen;};
 
+  const char *get_profile_name () const;
+
   riscv_subset_list *clone () const;
 
   static riscv_subset_list *parse (const char *, location_t *);