new file mode 100644
index 0000000..fffffff
--- /dev/null
+++ config-override.h
@@ -0,0 +1,11 @@
+/*
+ * Adds a mutex implementation based on c++ mutex to harfbuzz.
+ */
+#include <mutex>
+
+using hb_mutex_impl_t = std::mutex;
+#define HB_MUTEX_IMPL_INIT      UNUSED
+#define hb_mutex_impl_init(M)   HB_STMT_START { new (M) hb_mutex_impl_t;  } HB_STMT_END
+#define hb_mutex_impl_lock(M)   (M)->lock ()
+#define hb_mutex_impl_unlock(M) (M)->unlock ()
+#define hb_mutex_impl_finish(M) HB_STMT_START { (M)->~hb_mutex_impl_t(); } HB_STMT_END