Adjust find logic based on sdformat approach

Signed-off-by: Steve Peters <[email protected]>

CMakeLists.txt

@@ -56,20 +56,24 @@ message(STATUS "\n\n-- ====== Finding Dependencies ======")
 # Python interfaces
 if (SKIP_PYBIND11)
  message(STATUS "SKIP_PYBIND11 set - disabling python bindings")
+ find_package(Python3 COMPONENTS Interpreter)
 else()
- set(PYBIND11_PYTHON_VERSION 3)
- find_package(pybind11 2.4 QUIET)
-
- if (${pybind11_FOUND})
- message (STATUS "Searching for pybind11 - found version ${pybind11_VERSION}.")
- find_package(Python3 REQUIRED COMPONENTS Development Interpreter)
+ find_package(Python3 COMPONENTS Interpreter Development)
+ if (NOT Python3_Development_FOUND)
+ GZ_BUILD_WARNING("Python development libraries are missing: Python interfaces are disabled.")
  else()
- GZ_BUILD_WARNING("pybind11 is missing: Python interfaces are disabled.")
- message (STATUS "Searching for pybind11 - not found.")
+ set(PYBIND11_PYTHON_VERSION 3)
+ find_package(pybind11 2.4 CONFIG QUIET)
+
+ if (pybind11_FOUND)
+ message (STATUS "Searching for pybind11 - found version ${pybind11_VERSION}.")
+ else()
+ GZ_BUILD_WARNING("pybind11 is missing: Python interfaces are disabled.")
+ message (STATUS "Searching for pybind11 - not found.")
+ endif()
  endif()
 endif()
 
-
 #--------------------------------------
 # Find Protobuf
 gz_find_package(GzProtobuf