llvm-clang

I was trying to compile the following code for the classic copy&swap idiom on my Mac with clang 3.3 template<typename T> class node{ private: node<T>* left; node<T>* right; T value; public: friend void swap(node<T>&, node<T>&); // other stuff } Yet the linker complained. I now understand that I should declare the function as a template. But error would occur if I follow the style as suggested here from MSDN: template <class T> class Array { T* array; int size; public:template<class T> //... template <class T> friend Array<T>* combine(Array<T>& a1, Array<T>& a2); }; I did copy-paste but got the

Up to Xcode 6 when typing clang --version we got the information on what LLVM version it was built: Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn) But now with Xcode 7 we only get the following: Apple LLVM version 7.0.0 (clang-700.0.72) See https://gist.github.com/yamaya/2924292 in which an interesting comment says: Looking at the sources (src/CMakeLists.txt), it appears AppleClang is based on (approximately) the following LLVM branches: clang-700.0.72 => LLVM 3.7.0 clang-700.1.76 => LLVM 3.7.0 clang-700.1.81 => LLVM 3.7.0 clang-703.0.29 => LLVM 3.8.0 clang-703.0.31 => LLVM

I am trying to compile the RecursiveASTVisitor example of Clang using a CMake file. Building the project goes well, however linking C++ executable fails with multiple undefined reference to LLVM and Clang libraries. I am building the example outside of the LLVM/Clang source file tree. Here is my CMakeLists.txt (I am using FindClang.cmake and FindLLVM.cmake from this project ): cmake_minimum_required(VERSION 2.8.4) project(ifcount) set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH}) message(STATUS "CMAKE module path: ${CMAKE_MODULE_PATH}") find_path(LibClang

Can you give me an example ,how to add a simple call of a function foo(x); on my IR code with my pass in llvm? A simple way is to learn is to use ELLCC with Output Options as LLVM C++ API Code . Two key notes: Make sure foo 's definition is available; otherwise you need to define it firstly. Typically you need to get the prototype by using getOrInsertFunction and then use IRBuilder to insert the body for the function. Create the CallInst , an easy way is to use CallInst*IRBuilder::CreateCall(Value*, ArrayRef<Value*>, const Twine &) . Here is a segment I wrote before for llvm3.4; hope it can

Swift 2 have API availability checking . The compiler will give you an error when using an API too new for your minimum target OS Why can't the objective-c compiler do the equivalent? I googled objective c API availability checking and only swift 2 results came out so I assume the compiler for objective c can't do that. The warning (Swift makes it an error) just hadn't been implemented in the Clang compiler for years, but it's not an inherent Objective-C limitation (although due to its dynamic nature, you won't be able to catch all cases), nor Swift terminology. The Apple macros (e.g., NS