WIP: update to pybind11 2.6.0

CMakeLists.txt

@@ -1,22 +1,22 @@
-cmake_minimum_required(VERSION 3.0.2)
+cmake_minimum_required(VERSION 3.4)
 project(pybind11_catkin)
 
 find_package(catkin REQUIRED)
 include(ExternalProject)
 
 ExternalProject_Add(pybind11_src
-  # URL "https://github.com/pybind/pybind11/archive/master.zip" # broken as of July 31, 2020
-  URL "https://github.com/pybind/pybind11/archive/v2.5.0.zip"
+  URL "https://github.com/pybind/pybind11/archive/v2.6.0.zip"
   UPDATE_COMMAND ""
-  CMAKE_ARGS -DPYBIND11_PYTHON_VERSION=${PYTHON_VERSION_STRING}
-             -DPYBIND11_TEST:BOOL=OFF -DPYBIND11_INSTALL:BOOL=ON
-             -DCMAKE_INSTALL_PREFIX:PATH=${PROJECT_BINARY_DIR}/install
+  CMAKE_ARGS -DPYBIND11_NOPYTHON=TRUE
+             -DPYBIND11_TEST=OFF
+             -DPYBIND11_INSTALL=ON
+             -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR}/install
+             -DCMAKE_INSTALL_INCLUDEDIR=${CATKIN_DEVEL_PREFIX}/include/${PROJECT_NAME}
 )
+# We need to copy the entire content of the cmake/pybind11 folder to the correct place but with a different structure:
 ExternalProject_Add_Step(pybind11_src CopyToDevel
   COMMENT "Copying to devel"
-  COMMAND ${CMAKE_COMMAND} -E copy ${PROJECT_BINARY_DIR}/install/share/cmake/pybind11/pybind11Tools.cmake ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake
-  COMMAND ${CMAKE_COMMAND} -E copy ${PROJECT_BINARY_DIR}/install/share/cmake/pybind11/FindPythonLibsNew.cmake ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake
-  COMMAND ${CMAKE_COMMAND} -E copy_directory ${PROJECT_BINARY_DIR}/install/include/pybind11/ ${CATKIN_DEVEL_PREFIX}/include/${PROJECT_NAME}/pybind11/
+  COMMAND ${CMAKE_COMMAND} -E copy_directory ${PROJECT_BINARY_DIR}/install/share/cmake/pybind11/ ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake
   DEPENDEES install
 )
 
@@ -30,9 +30,26 @@ install(
   DIRECTORY ${CATKIN_DEVEL_PREFIX}/include/${PROJECT_NAME}/
   DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
 )
+
+# We glob the entire _original_ pybind11 cmake directory since there would be a few
+# files in the devel-share directory which we do *not* want to copy as they will be
+# regenerated in the install space:
+#  - pybind11_catkin.cmake
+#  - pybind11_catkinConfig-version.cmake
+#  - pybind11_catkinConfig.cmake
+# file(GLOB PYBIND11_CMAKE_FILES ${PROJECT_BINARY_DIR}/install/share/cmake/pybind11/*.cmake)
+
+set(PYBIND11_CMAKE_FILES
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/FindPythonLibsNew.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11Config.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11ConfigVersion.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11NewTools.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11Targets.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11Common.cmake
+  ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11Tools.cmake
+)
+
 install(
-  FILES
-    ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/FindPythonLibsNew.cmake
-    ${CATKIN_DEVEL_PREFIX}/share/${PROJECT_NAME}/cmake/pybind11Tools.cmake
+  FILES ${PYBIND11_CMAKE_FILES}
   DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}/cmake
 )

cmake/pybind11_catkin.cmake.in

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0.2)
+cmake_minimum_required(VERSION 3.4)
 
 # As of July 31, 2020 pybind11 upgraded to CMake version 3.8 (effectively dropping 16.04).
 # To be able to configure, we need to set CMP0069 (interprocedural optimization) to NEW
@@ -8,6 +8,8 @@ cmake_minimum_required(VERSION 3.0.2)
 # This finds python includes and libs and defines pybind11_add_module()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
 set(PYBIND11_PYTHON_VERSION ${PYTHON_VERSION_STRING})
+include(pybind11Config)
+include(pybind11Common)
 include(pybind11Tools)
 
 # set variables used by pybind11_add_module()