Hello 
currently, I got it working to reference the c_rtl.fx, but unfortunately, I get this error when compiling with the “C_rtl.fx”:
Unknown namespace c_rtl
I put the c_rtl.fx into the folder where all referenced .fx are, like gc.fx, RTL.fx and so on, he compiles without any lib error, except this line, it gives me just unknown namespace 
bit strange to me:
Best regard
Shpend
Just putting it there doesn’t do anything. You have to add it to the references list in the project. Also the things inside it need to have a namespace, for example by importing with --forcenamespace.
THANX, I also had referenced it, but the “–forcenamespace c_rtl” was missing and it works!!! Thanx!
But, I get, when I compile,: E:0 Severity Code Description Project File Line Suppression State
Error (E0) Internal error: System.InvalidCastException: Unable to cast object of type ‘RemObjects.Oxygene.Code.ParsedGenericParameter’ to type ‘RemObjects.Oxygene.Code.IMutableParsedType’.
at RemObjects.Oxygene.Code.ExplodingGenericsPass.Process()
at RemObjects.Oxygene.Code.IslandTarget.ExplodeGenerics(Compiler acompiler)
at RemObjects.Oxygene.Code.Compiler.Compiler.Compile() ElementsStuff 0
at this codeline:
var ptr:^Byte := ^Byte(c_rtl.malloc(sizeOf(byte) * 10));
But this seems, that it has nothing to do with the c-call, doesnt it?
indeed not. Can you send us a project that shows this?
hmm, interessting, it wasnt that line, sry… because I had 4 older classes which I was working on, and I need to find out where it is, I will send it immediately, to avoid the investigation by yourself not too loose time because its a bit much
When I declare my own used TArray = record, it compiles fine but gives some allocation problems, but when I change it to TArray = class, then it gives:
Severity Code Description Project File Line Suppression State
Error (E0) Internal error: System.InvalidCastException: Unable to cast object of type ‘RemObjects.Oxygene.Code.ParsedGenericParameter’ to type ‘RemObjects.Oxygene.Code.IMutableParsedType’.
at RemObjects.Oxygene.Code.ExplodingGenericsPass.Process()
at RemObjects.Oxygene.Code.IslandTarget.ExplodeGenerics(Compiler acompiler)
at RemObjects.Oxygene.Code.Compiler.Compiler.Compile() ElementsStuff0
Ok the error was, because I since never changed it, “pointer = dynamic.-array” pseudo-code and that is bad obviously because of GC issues, as you told me back then, so I changed it internally to:
f_first := ^TBlock<T>(c_rtl._alloca(sizeOf(T) * cnt)); //allocate on the stack, but raises:
Severity Code Description Project File Line Suppression State
Error () C:\Program Files (x86)\RemObjects Software\Elements\Bin\lld.exe: error: (import): undefined symbol: __alloca ElementsStuff C:\Program Files (x86)\MSBuild\RemObjects Software\Elements\RemObjects.Elements.Island.Windows.targets
that means you’re not actually linking in the .o/obj/a/lib that contains alloca. What are you doing exactly?
I am currently just “playing” with totall stack-allocation for implementing a short-time-pixel-buffer, that doesnt need any heap-alloc because he just shall be used as a tmp backbuffer
The point is, c_rtl.Malloc(bla) gets called 
You want (stack) alloca? That’s not an actual api… it’s a compiler intrinsic (since the compiler has to do that).
hmm, but MSDN says, it is in the malloc.h and even some guys on stackoverflow said that you can use it and they even made use of it
Right; but alloca itself is a compiler intrinsic. malloca probably calls that.
hmm, ok, but then they shouldnt have make it a public function then, ok nevermind^^ thx, but I want to ask you, even when I do the same line, just with malloc, I always get 0ptr back?
What I did then is this:
var size := sizeOf(TBlock<T>);
f_first := ^TBlock<T>(c_rtl.malloc(size * 3)); //allocate on heap
and the first line, the debugger isnt able to tell me the size
Hmm, I see in the malloc.h that malloca is a #define, can I make use of that?
#ifndef _CRTDBG_MAP_ALLOC
#undef _malloca
#define _malloca(size) \
__pragma(warning(suppress: 6255 6386)) \
(_MallocaComputeSize(size) != 0 \
? _MarkAllocaS(malloc(_MallocaComputeSize(size)), _ALLOCA_S_HEAP_MARKER) \
: NULL)
#endifYou can’t alloca in Elements currently.
what type is TBlock ? record or class?
a sizeof on a class always returns 4 or 8.
TBlock is a record, and I think, except the #define the rest I can implement on my own actually?
Possibly, but you can’t implement alloca.
and now I get: System.NullReferenceException; object-reference is not set to an istance of an object
I don’t. The testcase you sent me is incomplete.
Ok , w8 a min pls, I am now a little bit confused by this, I investigate and summarize all I said before together, that I can see: “do I get internal error and linker error” or not!
I don’t get an internal error; but that might be explained because I dont’ have the fx file you reference from the project. If you can send it I can try it again.