--- a/waftools/cpu_optimization.py
+++ b/waftools/cpu_optimization.py
@@ -168,7 +168,7 @@ def configure(conf):
             conf.env['OPT'] = False
             cpu_model = append_optimization_flags(conf, cxxflags)
 
-    if '-flto' in cxxflags:
+    if any(x.startswith('-flto') for x in cxxflags):
         conf.env['LTO'] = True
         cxxflags.append ("-ffat-lto-objects")