[PATCH v2 1/2] widl: Do not generate C++ enum typedefs in WinRT mode.

[Rémi Bernon]

MIDL generates enum typedefs without a prior type declaration, as well
as using explicit enum underlying type specifier. None of this is
supported in MinGW.

Signed-off-by: Rémi Bernon 
---

First patch should fix the C++ breakage introduced with 2a7940c97d4e6c,
and second patch should fix pre-existing C++ code breakage when using
types from different namespaces.

Supersedes: 202355-202356

tools/widl/header.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/tools/widl/header.c b/tools/widl/header.c
index 1a69b298e7d..0a133070b74 100644
--- a/tools/widl/header.c
+++ b/tools/widl/header.c
@@ -875,22 +875,28 @@ static void write_typedef(FILE *header, type_t *type, int declonly)
     type_t *t = type_alias_get_aliasee_type(type);
     if (winrt_mode && t->namespace && !is_global_namespace(t->namespace))
     {
-        fprintf(header, "#ifdef __cplusplus\n");
-        write_namespace_start(header, t->namespace);
-        indent(header, 0);
-    }
-    fprintf(header, "typedef ");
-    write_type_v(header, type_alias_get_aliasee(type), FALSE, declonly, type->name, NAME_DEFAULT);
-    fprintf(header, ";\n");
-    if (winrt_mode && t->namespace && !is_global_namespace(t->namespace))
-    {
-        write_namespace_end(header, t->namespace);
-        fprintf(header, "#else /* __cplusplus */\n");
+        fprintf(header, "#ifndef __cplusplus\n");
         fprintf(header, "typedef ");
         write_type_v(header, type_alias_get_aliasee(type), FALSE, declonly, type->c_name, NAME_C);
         fprintf(header, ";\n");
+        if (type_get_type_detect_alias(t) != TYPE_ENUM)
+        {
+            fprintf(header, "#else /* __cplusplus */\n");
+            write_namespace_start(header, t->namespace);
+            indent(header, 0);
+            fprintf(header, "typedef ");
+            write_type_v(header, type_alias_get_aliasee(type), FALSE, declonly, type->name, NAME_DEFAULT);
+            fprintf(header, ";\n");
+            write_namespace_end(header, t->namespace);
+        }
         fprintf(header, "#endif /* __cplusplus */\n\n");
     }
+    else
+    {
+        fprintf(header, "typedef ");
+        write_type_v(header, type_alias_get_aliasee(type), FALSE, declonly, type->name, NAME_DEFAULT);
+        fprintf(header, ";\n");
+    }
 }

int is_const_decl(const var_t *var)