Updates to fix broken Windows build.

Signed-off-by: Christina Tempelaar-Lietz <[email protected]>

PyIlmBase/CMakeLists.txt

@@ -44,14 +44,26 @@ endif()
 # now determine which (or both), and compile for both
 find_package(Python2 COMPONENTS Interpreter Development)
 find_package(Python3 COMPONENTS Interpreter Development)
-if(TARGET Python2::Python AND TARGET Python3::Python)
-  message(STATUS ": Found Python ${Python2_VERSION} and ${Python3_VERSION}")
-elseif(TARGET Python2::Python)
+if(Python2_FOUND)
   message(STATUS ": Found Python ${Python2_VERSION}")
-elseif(TARGET Python3::Python)
+elseif(Python2_Python)
+  message(WARNING ": Found Python ${Python2_VERSION} development libraries, but no interpreter")
+elseif(Python2_EXECUTABLE)
+  message(WARNING ": Found Python ${Python2_VERSION} interpreter, but no development libraries")
+else()
+  message(WARNING ": Unable to find Python ${Python2_VERSION} interpreter or development libraries")
+endif()
+if(Python3_FOUND)
   message(STATUS ": Found Python ${Python3_VERSION}")
+elseif(Python3_Python)
+  message(WARNING ": Found Python ${Python3_VERSION} development libraries, but no interpreter")
+elseif(Python3_EXECUTABLE)
+  message(WARNING ": Found Python ${Python3_VERSION} interpreter, but no development libraries")
 else()
-  message(WARNING ": Unable to find python development libraries for python 2 or 3")
+  message(WARNING ": Unable to find Python ${Python3_VERSION} interpreter or development libraries")
+endif()
+if (NOT Python2_FOUND AND NOT Python3_FOUND)
+  message(WARNING ": Disabling PyIlmBase")
   return()
 endif()
 
@@ -87,15 +99,15 @@ function(PYILMBASE_EXTRACT_REL_SITEARCH varname pyver pyexe pysitearch)
   message(STATUS "  -> Will install to: ${_reldir}")
 endfunction()
 
-if (TARGET Python2::Python)
+if(Python2_FOUND)
   set(PYILMBASE_BOOST_PY2_COMPONENT "python${Python2_VERSION_MAJOR}${Python2_VERSION_MINOR}")
   message(STATUS "Found Python2 libraries: ${Python2_VERSION_MAJOR}${Python2_VERSION_MINOR}")
   # we can't just use the Python2_SITEARCH variable as that then will
   # ignore CMAKE_INSTALL_PREFIX. Could extract this to a function somewhere
   # if it is generally useful
   pyilmbase_extract_rel_sitearch(PyIlmBase_Python2_SITEARCH_REL 2 ${Python2_EXECUTABLE} ${Python2_SITEARCH})
 endif()
-if (TARGET Python3::Python)
+if(Python3_FOUND)
   set(PYILMBASE_BOOST_PY3_COMPONENT "python${Python3_VERSION_MAJOR}${Python3_VERSION_MINOR}")
   message(STATUS "Found Python3 libraries: ${Python3_VERSION_MAJOR}${Python3_VERSION_MINOR}")
   # and figure out the install root here