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> Very good compatibility with C code How much harder would it be to call C++?

• KenoFischer 11y ago
  Depends how much of C++ you need. In full generality you need a C++ compiler in the calling compilation unit (inlining, template instantiation, etc.). The name mangling and ABI itself really isn't that hard.
• azakai 11y ago
  It might be interesting to use the clang frontend and modify it to emit QBE instead of LLVM. I believe Visual Studio and ICC do that.
  • andrewchambers 11y ago
    One thought i had would be make a qbe backend for llvm, just as a temporary solution until there are faster smaller frontends that can replace them.
• ori_b 11y ago
  The same difficulty,more or less. Mangle in your front-end. The problem comes from the fact that half of C++ lives in headers in the form of templates, so there isn't any code to call, from the perspective of a compiler back end. To link against code using things like the STL, your compiler would basically need to understand how to compile C++. Same problem as macros in C, but macros are usually less pervasive in C code, meaning that often you get a good enough binding by ignoring them or filling in wrapper functions by hand.
• deleted 11y ago
  [deleted]