[C++] Re-generate build.ninja when ckati is updated
diff --git a/fileutil.h b/fileutil.h
index 26b8e5e..96659d9 100644
--- a/fileutil.h
+++ b/fileutil.h
@@ -29,6 +29,8 @@
 int RunCommand(const string& shell, const string& cmd, bool redirect_stderr,
                string* out);
 
+void GetExecutablePath(string* path);
+
 void Glob(const char* pat, vector<string>** files);
 
 #endif  // FILEUTIL_H_