cannot build cheerp-llvm from source (git clone 16-JUL-2015)

[Steven G. Messervey]

Cloned today, with cheerp-clang cloned into tools/clang
CMake per instrctions.

/usr/local/src/cheerp/cheerp-llvm/lib/CheerpUtils/Registerize.cpp: In member function ‘uint32_t cheerp::Registerize::dfsLiveRangeInBlock(cheerp::Registerize::BlocksState&, cheerp::Registerize::LiveRangesTy&, const InstIdMapTy&, llvm::BasicBlock&, cheerp::PointerAnalyzer&, uint32_t, uint32_t)’:
/usr/local/src/cheerp/cheerp-llvm/lib/CheerpUtils/Registerize.cpp:291:43: error: ‘cheerp::Registerize::LiveRangesTy’ has no member named ‘emplace’

Some quick, blind searches can't find a method emplace, googling finds an emplace method in llvm::Optional

[Alessandro Pignotti (a-pignotti)]

std::map::emplace is a standard library method

http://en.cppreference.com/w/cpp/container/map/emplace

Make sure you are building cheerp using a modern compiler. Recent versions of gcc, clang and msvc should work.