MathCompile is a package that translates Wolfram Language functions into C++ code and generate dynamic libraries that can be called in Wolfram Language.

MathCompile is focused on improving the availability of functional programming and covering the functionalities provided by the built-in compiler. Currently, MathCompile supports over 300 functions and over 20 constants; see the wiki page for the full list.

To compile Wolfram Language functions to C++ code, Wolfram Mathematica 12 is required. An alternative to Mathematica is Wolfram Engine, which is freely available to developers.

To compile functions to binary, a C++ compiler supporting C++17 standard is required. See this wiki page for the list of all supported C++ compilers, their availabilities, and how to use them.

MathCompile supports linking with external BLAS and LAPACK libraries as an alternative to Eigen. See this wiki page for how to do this.

To know more about MathCompile, see the Wiki.

To learn about how to install and use MathCompile, see the Guide.

First, load the package:

<<MathCompile`

If you have a supported C++ compiler, compile a function to binary using CompileToBinary:

cf=CompileToBinary[
  Function[{Typed[x,{Integer,1}]},Apply[Times,x]]
]

Use this compiled function just like a normal Wolfram Language funcion:

cf[{1,2,3,4}]    (* gives 24 *)

Without a C++ compiler, you can still check the intermediate C++ code using CompileToCode:

CompileToCode[
  Function[{Typed[x,{Integer,1}]},Apply[Times,x]]
]

The result is a C++ function named main_function:

auto main_function(const wl::ndarray<int64_t, 1>& v35) {
    return wl::val(wl::apply(WL_FUNCTION(wl::times), WL_PASS(v35)));
}

The disassembly generated by GCC 7.4 and Clang 5.0 for this function is available through Compiler Explorer.