Fix build error with clang

diff --git a/frontends/ast/ast.cc b/frontends/ast/ast.cc
index 10fd5277a4b802d7cc0fee85b764a1f4fb051699..b3f78c9225246006db46d6b78e40c16640367722 100644 (file)
--- a/frontends/ast/ast.cc
+++ b/frontends/ast/ast.cc
@@ -1199,7 +1199,7 @@ RTLIL::IdString AstModule::derive(RTLIL::Design *design, dict<RTLIL::IdString, R
                                new_subcell->set_bool_attribute("\\is_interface");
                        }
                        else {
-                               log_error("No port with matching name found (%s) in %s. Stopping\n", log_id(intf.first), modname);
+                               log_error("No port with matching name found (%s) in %s. Stopping\n", log_id(intf.first), modname.c_str());
                        }
                }