OSX Support

[jasl8r]

I've had trouble with building and using this on OSX. Ultimately I have compiled the projects, but I have problems with unresolved symbols for ASTContext (_ZN8CppSharp9CppParser3AST10ASTContextC2Ev). The constructor is not defined in AST.h, so I'm not sure how this was generated in AST.cs. I can go and add in an empty constructor for ASTContext, but then I get some other errors due to null values somewhere...

Does anyone have some clearer instructions on how to get the OSX build up?

Unhandled Exception:
System.NotSupportedException: Original pointer must not be null
  at CppSharp.DeclConverter.Visit (CppSharp.Parser.AST.Declaration decl) [0x00000] in <filename unknown>:0
  at CppSharp.DeclConverter.VisitDeclaration (CppSharp.Parser.AST.Declaration decl, CppSharp.AST.Declaration _decl) [0x00000] in <filename unknown>:0
  at CppSharp.DeclConverter.VisitTranslationUnit (CppSharp.Parser.AST.TranslationUnit decl) [0x00000] in <filename unknown>:0
  at CppSharp.DeclVisitor`1[CppSharp.AST.Declaration].Visit (CppSharp.Parser.AST.Declaration decl) [0x00000] in <filename unknown>:0
  at CppSharp.DeclConverter.Visit (CppSharp.Parser.AST.Declaration decl) [0x00000] in <filename unknown>:0
  at CppSharp.ASTConverter.Convert () [0x00000] in <filename unknown>:0
  at CppSharp.ClangParser.ConvertASTContext (CppSharp.Parser.AST.ASTContext context) [0x00000] in <filename unknown>:0
  at CppSharp.Driver.ParseCode () [0x00000] in <filename unknown>:0
  at CppSharp.ConsoleDriver.Run (ILibrary library) [0x00000] in <filename unknown>:0
  at Crap.Test+Program.Main (System.String[] args) [0x00000] in <filename unknown>:0

[tritao]

I think I've fixed this locally, I'll commit some OSX fixes soon, let me know if they fix this.

[jasl8r]

I'm seeing more or less the same issues based on 74007be. I had some other problems as well:

• I had to swap the parameters for the instance and the return value here (which just seems... weird): https://github.com/mono/CppSharp/blob/master/src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/CppParser.cs#L753
• I had the remove the hidden inline visibility option in the CppParser makefile, otherwise all the default constructors were not extern'ed and were not callable from C#.
• I had to add the ASTContext constructor.
  I still have the original null pointer problem along with general memory corruption issues.

On a side note, I think it would be very useful to indicate the SVN revision of llvm used when the bindings are generated. It seems like llvm breaks the API almost daily.

[tritao]

Yes the parameter swapping issue is well known, I started fixing it in the generator a couple weeks ago but I haven't had time to pick it up since. The Itanium ABI differs from the Microsoft one when there's indirect return parameters in the thiscall convention (member methods). The parameters need to be swapped.

I thought I had removed the hidden inline visibility option, once I get back on the OSX port I'll be sure to fix it, the ASTContext constructor too.

About your LLVM revision suggestion, it was suggested before and I started mentioning the latest working revision on the getting started documentation page, though it may be out-of-date, not sure I remembered to change it the last time I updated LLVM.

[tritao]

I've done some further work on the OSX port and it now compiles and runs. The test suite still has a couple failures, but I'll be dealing with those next.

Feel free to give it a try again.