CMake: Remove FREECAD_USE_PYBIND11 as a build option

cMake/FreeCAD_Helpers/InitializeFreeCADBuildOptions.cmake

@@ -201,6 +201,10 @@ macro(InitializeFreeCADBuildOptions)
         set(BUILD_SMESH OFF)
     endif()
 
+    if (BUILD_CAM OR BUILD_FLAT_MESH)
+        set(FREECAD_USE_PYBIND11 ON)
+    endif()
+
     # force build directory to be different to source directory
     if (BUILD_FORCE_DIRECTORY)
         if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})

cMake/FreeCAD_Helpers/PrintFinalReport.cmake

@@ -87,7 +87,6 @@ macro(PrintFinalReport)
     value(Python3_EXECUTABLE)
     value(PYTHON_LIBRARY)
     value(FREECAD_CREATE_MAC_APP)
-    value(FREECAD_USE_PYBIND11)
     value(FREECAD_USE_EXTERNAL_KDL)
     value(FREECAD_USE_PYSIDE)
     value(FREECAD_USE_SHIBOKEN)

cMake/FreeCAD_Helpers/SetupPybind11.cmake

@@ -2,7 +2,6 @@ macro(SetupPybind11)
 # -------------------------------- PyBind11 -----------------------------
 
     # necessary for flat-mesh feature
-    option(FREECAD_USE_PYBIND11 "Use pybind11" OFF)
     if (FREECAD_USE_PYBIND11)
         find_package(pybind11 REQUIRED)
     endif()

src/Mod/MeshPart/App/CMakeLists.txt

@@ -99,7 +99,7 @@ INSTALL(TARGETS MeshPart DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
 
 ################################ flat mesh ###############################
-if (BUILD_FLAT_MESH AND FREECAD_USE_PYBIND11)
+if (BUILD_FLAT_MESH)
     SET(FLATMESH_SRCS
         MeshFlattening.cpp
         MeshFlattening.h
@@ -117,5 +117,5 @@ if (BUILD_FLAT_MESH AND FREECAD_USE_PYBIND11)
 
     SET_BIN_DIR(flatmesh flatmesh /Mod/MeshPart)
     install(TARGETS flatmesh DESTINATION ${CMAKE_INSTALL_LIBDIR})
-endif(BUILD_FLAT_MESH AND FREECAD_USE_PYBIND11)
+endif(BUILD_FLAT_MESH)
 ############################################################################