Exported all additional symbols on macOS.

Many functions in libc++ are marked with _LIBCPP_INLINE_VISIBILITY. This means they are only exported when actually used. This is why exporting just the templates themselves failed to export their functions but listing the functions themselves worked. We need to define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS to have the functions always exported.

We use _LIBCPP_VERSION to detect if we use libc++ i.e. Clang's standard C++ library.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/Std-symbols.cpp

@@ -1,7 +1,12 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string();
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>::~basic_string() noexcept;
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>& std::basic_string<char, std::char_traits<char>, std::allocator<char>>::assign(const std::basic_string<char, std::char_traits<char>, std::allocator<char>>::value_type*);
-template __attribute__((visibility("default"))) const std::basic_string<char, std::char_traits<char>, std::allocator<char>>::value_type* std::basic_string<char, std::char_traits<char>, std::allocator<char>>::c_str() const noexcept;
+template class std::char_traits<char>;
+template class std::allocator<char>;
+template class std::basic_string<char, std::char_traits<char>, std::allocator<char>>;

src/CppParser/Bindings/CSharp/i686-pc-win32-msvc/Std-symbols.cpp

@@ -1,3 +1,9 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 

src/CppParser/Bindings/CSharp/x86_64-apple-darwin12.4.0/Std-symbols.cpp

@@ -1,7 +1,12 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string();
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>::~basic_string() noexcept;
-template __attribute__((visibility("default"))) std::basic_string<char, std::char_traits<char>, std::allocator<char>>& std::basic_string<char, std::char_traits<char>, std::allocator<char>>::assign(const std::basic_string<char, std::char_traits<char>, std::allocator<char>>::value_type*);
-template __attribute__((visibility("default"))) const std::basic_string<char, std::char_traits<char>, std::allocator<char>>::value_type* std::basic_string<char, std::char_traits<char>, std::allocator<char>>::c_str() const noexcept;
+template class std::char_traits<char>;
+template class std::allocator<char>;
+template class std::basic_string<char, std::char_traits<char>, std::allocator<char>>;

src/CppParser/Bindings/CSharp/x86_64-linux-gnu-cxx11abi/Std-symbols.cpp

@@ -1,3 +1,9 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 

src/CppParser/Bindings/CSharp/x86_64-linux-gnu/Std-symbols.cpp

@@ -1,3 +1,9 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 

src/CppParser/Bindings/CSharp/x86_64-pc-win32-msvc/Std-symbols.cpp

@@ -1,3 +1,9 @@
+#include <ciso646>
+
+#ifdef _LIBCPP_VERSION
+    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+#endif
+
 #include <string>
 
 

src/Generator/Passes/SymbolsCodeGenerator.cs

@@ -5,7 +5,6 @@
 using CppSharp.AST;
 using CppSharp.AST.Extensions;
 using CppSharp.Generators;
-using CppSharp.Parser;
 
 namespace CppSharp.Passes
 {
@@ -20,6 +19,16 @@ public SymbolsCodeGenerator(BindingContext context, IEnumerable<TranslationUnit>
 
         public override void Process()
         {
+            WriteLine("#include <ciso646>");
+            NewLine();
+
+            // check if we use the Clang standard C++ lib and if so,
+            // make sure we export all symbols marked with _LIBCPP_INLINE_VISIBILITY
+            WriteLine("#ifdef _LIBCPP_VERSION");
+            WriteLine("    #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS");
+            WriteLine("#endif");
+            NewLine();
+
             if (TranslationUnit.Module == Options.SystemModule)
                 WriteLine("#include <string>");
             else
@@ -62,12 +71,8 @@ public override bool VisitFunctionDecl(Function function)
 
         private string GetExporting()
         {
-            var exporting = string.Empty;
-            if (Context.ParserOptions.IsMicrosoftAbi)
-                exporting = "__declspec(dllexport) ";
-            else if (TargetTriple.IsMacOS(Context.ParserOptions.TargetTriple))
-                exporting = "__attribute__((visibility(\"default\"))) ";
-            return exporting;
+            return Context.ParserOptions.IsMicrosoftAbi ?
+                "__declspec(dllexport) " : string.Empty;
         }
 
         private string GetWrapper(Module module)

src/Generator/Types/Std/Stdlib.cs

@@ -137,7 +137,7 @@ public override void CSharpMarshalToNative(CSharpMarshalContext ctx)
                 ctx.Before.WriteLine($@"{qualifiedBasicString}Extensions.{
                     assign.Name}({varBasicString}, {ctx.Parameter.Name});");
                 ctx.Return.Write($"{varBasicString}.{Helpers.InstanceIdentifier}");
-                if (!type.IsAddress())
+                if (!type.IsPointer())
                     ctx.Cleanup.WriteLine($"{varBasicString}.Dispose(false);");
             }
         }