Fix #11443 (FP: misra-c2012-5.7 on anonymous struct) (cppcheck-opensource#5033)

Author: danmar

addons/misra.py

@@ -1362,6 +1362,8 @@ def _save_ctu_summary_tagnames(self, dumpfile, cfg):
         for scope in cfg.scopes:
             if scope.className is None:
                 continue
+            if scope.className.startswith('Anonymous'):
+                continue
             if scope.type not in ('Struct', 'Enum'):
                 continue
             used = False

addons/test/misra/misra-ctu-1-test.c

@@ -17,6 +17,12 @@ struct misra_5_7_violation_t {
 };
 static misra_5_7_violation_t misra_5_7_use_type_1;
 
+// #11443 - FP
+static struct
+{ // no warning
+    uint16_t x;
+} misra_5_7_false_positive_1;
+
 // cppcheck-suppress misra-c2012-8.4
 // cppcheck-suppress misra-c2012-5.8
 int misra_5_8_var1;

addons/test/misra/misra-ctu-2-test.c

@@ -17,6 +17,12 @@ struct misra_5_7_violation_t {
 };
 static misra_5_7_violation_t misra_5_7_use_type_2;
 
+// #11443 - FP
+static struct
+{ // no warning
+    uint16_t x;
+} misra_5_7_false_positive_2;
+
 // cppcheck-suppress misra-c2012-5.8
 static int misra_5_8_var1;
 // cppcheck-suppress misra-c2012-8.4