From 255fe37ec14bde323d6526abd43136ba2b1c9903 Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Tue, 29 Dec 2015 20:15:00 -0800
Subject: [PATCH] Add workaround for zero-sized struct (and use it).

---
 Analyze.cpp      | 14 ++++++++++----
 sig/ffi_type.cpp | 15 +++++++++++----
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/Analyze.cpp b/Analyze.cpp
index 1eac8a0..b98e027 100644
--- a/Analyze.cpp
+++ b/Analyze.cpp
@@ -127,6 +127,8 @@ std::ostream &operator <<(std::ostream &out, const CYCXPosition<clang_get_Locati
 }
 
 struct CYKey {
+    unsigned priority_ = 0;
+
     std::string code_;
     unsigned flags_;
 };
@@ -293,6 +295,7 @@ static CXChildVisitResult CYChildVisit(CXCursor cursor, CXCursor parent, CXClien
     CYCXString spelling(cursor);
     std::string name(spelling);
     std::ostringstream value;
+    unsigned priority(2);
     unsigned flags(0);
 
     /*CXSourceLocation location(clang_getCursorLocation(cursor));
@@ -364,10 +367,10 @@ static CXChildVisitResult CYChildVisit(CXCursor cursor, CXCursor parent, CXClien
         } break;
 
         case CXCursor_StructDecl: {
-            if (!clang_isCursorDefinition(cursor))
-                goto skip;
             if (spelling[0] == '\0')
                 goto skip;
+            if (!clang_isCursorDefinition(cursor))
+                priority = 1;
 
             std::ostringstream types;
             std::ostringstream names;
@@ -453,8 +456,11 @@ static CXChildVisitResult CYChildVisit(CXCursor cursor, CXCursor parent, CXClien
 
     {
         CYKey &key(baton.keys[name]);
-        key.code_ = value.str();
-        key.flags_ = flags;
+        if (key.priority_ < priority) {
+            key.priority_ = priority;
+            key.code_ = value.str();
+            key.flags_ = flags;
+        }
     }
 
   skip:
diff --git a/sig/ffi_type.cpp b/sig/ffi_type.cpp
index e114db8..5c16db3 100644
--- a/sig/ffi_type.cpp
+++ b/sig/ffi_type.cpp
@@ -158,10 +158,17 @@ ffi_type *Aggregate::GetFFI(CYPool &pool) const {
     ffi->alignment = 0;
     ffi->type = FFI_TYPE_STRUCT;
 
-    ffi->elements = new(pool) ffi_type *[signature.count + 1];
-    for (size_t index(0); index != signature.count; ++index)
-        ffi->elements[index] = signature.elements[index].type->GetFFI(pool);
-    ffi->elements[signature.count] = NULL;
+    if (signature.count == 0) {
+        // https://gcc.gnu.org/ml/gcc-patches/2015-01/msg01286.html
+        ffi->elements = new(pool) ffi_type *[2];
+        ffi->elements[0] = &ffi_type_void;
+        ffi->elements[1] = NULL;
+    } else {
+        ffi->elements = new(pool) ffi_type *[signature.count + 1];
+        for (size_t index(0); index != signature.count; ++index)
+            ffi->elements[index] = signature.elements[index].type->GetFFI(pool);
+        ffi->elements[signature.count] = NULL;
+    }
 
     return ffi;
 }
-- 
2.45.2