Allow local redefinition of enumerator

tccgen.c

@@ -2827,7 +2827,7 @@ static void struct_decl(CType *type, int u, int tdef)
                 if (v < TOK_UIDENT)
                     expect("identifier");
                 ss = sym_find(v);
-                if (ss)
+                if (ss && !local_stack)
                     tcc_error("redefinition of enumerator '%s'",
                               get_tok_str(v, NULL));
                 next();

tests/tests2/63_local_enumerator_redefinition.c

@@ -0,0 +1,14 @@
+enum {
+    FOO,
+    BAR
+};
+
+int main(void)
+{
+    enum {
+        FOO = 2,
+        BAR
+    };
+
+    return BAR - FOO;
+}

tests/tests2/Makefile

@@ -74,7 +74,8 @@ TESTS =	\
  59_function_array.test \
  60_enum_redefinition.test \
  61_undefined_enum.test \
- 62_enumerator_redefinition.test
+ 62_enumerator_redefinition.test \
+ 63_local_enumerator_redefinition.test
 
 # 30_hanoi.test -- seg fault in the code, gcc as well
 # 34_array_assignment.test -- array assignment is not in C standard