diff --git a/config.lib b/config.lib
--- a/config.lib
+++ b/config.lib
@@ -1134,7 +1134,8 @@ make_compiler_cflags() {
 
 		if [ $cc_version -ge 110 ]; then
 			# vec report defaults to telling where it did loop vectorisation, which is not very important
-			flags="$flags -vec-report=0 -wd873"
+			# it also complains about not fully overriding virtual function
+			flags="$flags -vec-report=0 -wd873 -wd654"
 
 			# Use c++0x mode so static_assert() is available
 			cxxflags="$cxxflags -std=c++0x"
diff --git a/src/misc/dbg_helpers.h b/src/misc/dbg_helpers.h
--- a/src/misc/dbg_helpers.h
+++ b/src/misc/dbg_helpers.h
@@ -79,7 +79,7 @@ inline CStrA ComposeNameT(E value, T &t,
 	} else {
 		for (size_t i = 0; i < ArrayT<T>::length; i++) {
 			if ((value & (1 << i)) == 0) continue;
-			out.AddFormat("%s%s", (out.Size() > 0 ? "+" : ""), t[i]);
+			out.AddFormat("%s%s", (out.Size() > 0 ? "+" : ""), (const char*)t[i]);
 			value &= ~(E)(1 << i);
 		}
 		if (value != 0) out.AddFormat("%s%s", (out.Size() > 0 ? "+" : ""), t_unk);
diff --git a/src/order_backup.h b/src/order_backup.h
--- a/src/order_backup.h
+++ b/src/order_backup.h
@@ -29,7 +29,7 @@ typedef Pool<OrderBackup, OrderBackupID,
 extern OrderBackupPool _order_backup_pool;
 
 /** Flag to pass to the vehicle construction command when an order should be preserved. */
-static const uint32 MAKE_ORDER_BACKUP_FLAG = 1 << 31;
+static const uint32 MAKE_ORDER_BACKUP_FLAG = 1U << 31;
 
 /**
  * Data for backing up an order of a vehicle so it can be