chore: ignore warnings from pybind11_DIR

Author: XuehaiPan

CMakeLists.txt

@@ -65,7 +65,7 @@ if(MSVC)
         APPEND CMAKE_CXX_FLAGS
         " /EHsc /bigobj"
         " /Zc:preprocessor"
-        " /experimental:external /external:anglebrackets /external:W0"
+        " /experimental:external /external:anglebrackets /external:env:pybind11_DIR /external:W0"
         " /Wall /Wv:19.40"  # Visual Studio 2022 version 17.10
         # Suppress following warnings
         " /wd4127"  # conditional expression is constant
@@ -251,6 +251,7 @@ else()
     list(PREPEND CMAKE_PREFIX_PATH "${pybind11_DIR}")
     find_package(pybind11 "${pybind11_MINIMUM_VERSION}" CONFIG REQUIRED)
 endif()
+set(ENV{pybind11_DIR} "${pybind11_DIR}")
 
 set(SETUPTOOLS_EXT_SUFFIX "$ENV{SETUPTOOLS_EXT_SUFFIX}")
 if(SETUPTOOLS_EXT_SUFFIX)