From 6146a85d371481222c10ede4430ad5476e60de87 Mon Sep 17 00:00:00 2001
From: Changming Sun <chasun@microsoft.com>
Date: Wed, 22 Aug 2018 22:07:34 -0700
Subject: [PATCH] Check pybind version (#1315)

---
 CMakeLists.txt | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 618ef0568fa..0db49c77f73 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -305,14 +305,18 @@ if(BUILD_ONNX_PYTHON)
                                      "${PYTHON_INCLUDE_DIR}")
 
   # pybind11 is a header only lib
-  find_package(pybind11)
+  find_package(pybind11 2.2)
   if(pybind11_FOUND)
     target_include_directories(onnx_cpp2py_export
                                PRIVATE ${pybind11_INCLUDE_DIRS})
   else()
-    target_include_directories(
-      onnx_cpp2py_export
-      PRIVATE ${ONNX_ROOT}/third_party/pybind11/include)
+    if(EXISTS ${ONNX_ROOT}/third_party/pybind11/include/pybind11/pybind11.h)
+      target_include_directories(
+        onnx_cpp2py_export
+        PRIVATE ${ONNX_ROOT}/third_party/pybind11/include)
+    else()
+      message(FATAL_ERROR "cannot find pybind")
+    endif()
   endif()
 
   if(APPLE)