[WIP] Setup Pybind for placeholder C++ code (#38)

* Add Pybind11 as  submodule

* Add placeholder C++ code

.gitmodules

@@ -1,3 +1,6 @@
-[submodule "libsnark"]
-	path = libsnark
+[submodule "third_party/pybind11"]
+	path = third_party/pybind11
+	url = https://github.com/pybind/pybind11.git
+[submodule "third_party/libsnark"]
+	path = third_party/libsnark
 	url = https://github.com/scipr-lab/libsnark.git

CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required( VERSION 3.3.0 )
+project(PyZPK)
+
+add_subdirectory(third_party/pybind11) 
+pybind11_add_module(PyZPK src/main.cpp)

build.sh

@@ -5,7 +5,8 @@ sudo apt-get install libboost-all-dev
 # Updating libprocps to run the cmake (requirement)
 sudo apt-get install libprocps-dev
 
-rm -r libsnark
+rm -r third_party/libsnark
+rm -r third_party/pybind11
 #Sync & Initialization of libsnark
 git submodule sync
 git submodule init
@@ -15,10 +16,18 @@ git submodule update --init --recursive
 git submodule foreach --recursive git reset --hard
 
 
-cd libsnark
+cd third_party/libsnark
 mkdir build
 cd build
 
 cmake ..
 
 make
+
+cd ../../..
+mkdir build
+cd build
+
+cmake ..
+
+make

build_MacOS.sh

@@ -5,10 +5,11 @@ brew list cmake || brew install cmake
 brew list gmp || brew install gmp
 brew list boost || brew install boost
 brew list gcc || brew install gcc
-bre list pkg-config || brew install pkg-config
+brew list pkg-config || brew install pkg-config
 
 # Removing old directory
-rm -rf libsnark
+rm -rf third_party/libsnark
+rm -rf third_party/pybind11
 
 #Sync & Initialization of libsnark
 git submodule sync
@@ -19,7 +20,7 @@ git submodule intit
 # Reset all submodules
 git submodule foreach --recursive git reset --hard
 
-cd libsnark
+cd third_party/libsnark
 mkdir build
 cd build
 
@@ -36,3 +37,11 @@ cmake -DWITH_PROCPS=OFF -DWITH_SUPERCOP=OFF ..
 
 
 make
+
+cd ../../..
+mkdir build
+cd build
+
+cmake ..
+
+make

src/main.cpp

@@ -0,0 +1,35 @@
+#include <pybind11/pybind11.h>
+
+int add(int i, int j) {
+    return i + j;
+}
+
+namespace py = pybind11;
+
+PYBIND11_MODULE(PyZPK, m) {
+    m.doc() = R"pbdoc(
+        Pybind11 example plugin
+        -----------------------
+        .. currentmodule:: PyZPK
+        .. autosummary::
+           :toctree: _generate
+           add
+           subtract
+    )pbdoc";
+
+    m.def("add", &add, R"pbdoc(
+        Add two numbers
+        Some other explanation about the add function.
+    )pbdoc");
+
+    m.def("subtract", [](int i, int j) { return i - j; }, R"pbdoc(
+        Subtract two numbers
+        Some other explanation about the subtract function.
+    )pbdoc");
+
+#ifdef VERSION_INFO
+    m.attr("__version__") = VERSION_INFO;
+#else
+    m.attr("__version__") = "dev";
+#endif
+}