use system pybind11 package (#167)

* use system pybind11 package

* do not build apps for Python bindings

* set correct RPATH for Python binding shared object

.gitmodules

@@ -7,6 +7,3 @@
 [submodule "thirdparty/nvbio"]
 	path = thirdparty/nvbio
 	url = https://github.com/NVlabs/nvbio.git
-[submodule "thirdparty/pybind11"]
-	path = thirdparty/pybind11
-	url = https://github.com/pybind/pybind11.git

CMakeLists.txt

@@ -91,7 +91,7 @@ endif()
 
 ### Python bindings ###
 if(BUILD_PYTHON_BINDINGS)
-  add_subdirectory(thirdparty/pybind11)
+  find_package(pybind11 CONFIG)
   pybind11_add_module(pygicp
     src/python/main.cpp
   )
@@ -103,6 +103,10 @@ if(BUILD_PYTHON_BINDINGS)
   target_link_libraries(pygicp PRIVATE
     fast_gicp
   )
+  set_target_properties(pygicp PROPERTIES
+    INSTALL_RPATH "$ORIGIN/"
+    BUILD_WITH_INSTALL_RPATH TRUE
+  )
 endif()
 
 ### CUDA ###

setup.py

@@ -50,6 +50,7 @@ def build_extension(self, ext):
             "-DCMAKE_BUILD_TYPE={}".format(cfg),  # not used on MSVC, but no harm,
             # "-DBUILD_VGICP_CUDA=ON",
             "-DBUILD_PYTHON_BINDINGS=ON",
+            "-DBUILD_apps=OFF",
         ]
         build_args = []