diff --git a/tools/versioner/src/DeclarationDatabase.cpp b/tools/versioner/src/DeclarationDatabase.cpp
index a029c3b..9794286 100644
--- a/tools/versioner/src/DeclarationDatabase.cpp
+++ b/tools/versioner/src/DeclarationDatabase.cpp
@@ -103,7 +103,7 @@
     }
 
     std::string declaration_name = getDeclName(named_decl);
-    bool is_extern = named_decl->getFormalLinkage() == ExternalLinkage;
+    bool is_extern = named_decl->getFormalLinkage() == Linkage::External;
     bool is_definition = false;
     bool no_guard = false;
     bool fortify_inline = false;
diff --git a/tools/versioner/src/Driver.cpp b/tools/versioner/src/Driver.cpp
index 24dc5ec..79672ac 100644
--- a/tools/versioner/src/Driver.cpp
+++ b/tools/versioner/src/Driver.cpp
@@ -42,7 +42,7 @@
 #include <llvm/ADT/SmallVector.h>
 #include <llvm/ADT/StringRef.h>
 #include <llvm/Option/Option.h>
-#include <llvm/Support/Host.h>
+#include <llvm/TargetParser/Host.h>
 #include <llvm/Support/VirtualFileSystem.h>
 
 #include "Arch.h"
diff --git a/tools/versioner/src/Preprocessor.cpp b/tools/versioner/src/Preprocessor.cpp
index 47b9017..74d5ba0 100644
--- a/tools/versioner/src/Preprocessor.cpp
+++ b/tools/versioner/src/Preprocessor.cpp
@@ -448,7 +448,7 @@
 
   while (FTSENT* ent = fts_read(fts.get())) {
     llvm::StringRef path = ent->fts_path;
-    if (!path.startswith(src_dir)) {
+    if (!path.starts_with(src_dir)) {
       err(1, "path '%s' doesn't start with source dir '%s'", ent->fts_path, src_dir.c_str());
     }
 
@@ -489,7 +489,7 @@
     // TODO: Merge adjacent non-identical guards.
     mergeGuards(file_lines[file_path.str()], guard_map);
 
-    if (!file_path.startswith(src_dir)) {
+    if (!file_path.starts_with(src_dir)) {
       errx(1, "input file %s is not in %s\n", file_path.str().c_str(), src_dir.c_str());
     }
 
diff --git a/tools/versioner/src/Utils.cpp b/tools/versioner/src/Utils.cpp
index dc6b5dd..d2bb1a8 100644
--- a/tools/versioner/src/Utils.cpp
+++ b/tools/versioner/src/Utils.cpp
@@ -83,7 +83,7 @@
 }
 
 llvm::StringRef StripPrefix(llvm::StringRef string, llvm::StringRef prefix) {
-  if (string.startswith(prefix)) {
+  if (string.starts_with(prefix)) {
     return string.drop_front(prefix.size());
   }
   return string;
diff --git a/tools/versioner/src/versioner.cpp b/tools/versioner/src/versioner.cpp
index 5afa00b..955cdcf 100644
--- a/tools/versioner/src/versioner.cpp
+++ b/tools/versioner/src/versioner.cpp
@@ -146,7 +146,7 @@
         continue;
       }
 
-      if (header.endswith("/" + it.first)) {
+      if (header.ends_with("/" + it.first)) {
         return true;
       }
     }