WIP: Add stub module that uses pybind11

Author: dopplershift

src/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.15...3.26)
+project(
+  "${SKBUILD_PROJECT_NAME}"
+  LANGUAGES CXX
+  VERSION "${SKBUILD_PROJECT_VERSION}")
+
+find_package(Python COMPONENTS Interpreter Development.Module REQUIRED)
+find_package(pybind11 CONFIG REQUIRED)
+
+pybind11_add_module(_calc_mod MODULE calcmod.cpp)
+
+target_compile_definitions(_calc_mod
+                           PRIVATE VERSION_INFO=${PROJECT_VERSION})
+
+install(TARGETS _calc_mod DESTINATION metpy)

src/calcmod.cpp

@@ -0,0 +1,10 @@
+#include <pybind11/pybind11.h>
+
+int add(int i, int j) {
+    return i + j;
+}
+
+PYBIND11_MODULE(_calc_mod, m) {
+    m.doc() = "accelerator module docstring";
+    m.def("add", &add, "Add two numbers");
+}