CMake: reorder Python detection

[libftdi] / python / CMakeLists.txt

diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 494f6ff..5b6f420 100644 (file)
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -1,7 +1,7 @@
-# swig_add_library behavior changed in cmake 3.13 and SWIG_MODULE_<target>_REAL_NAME
-# is no longer set by default so set policy to the old behavior.
-if(NOT CMAKE_VERSION VERSION_LESS 3.13.0)
-  cmake_policy(SET CMP0078 OLD)
+# swig_add_library behavior changed in cmake 3.13 to no longer set
+# SWIG_MODULE_<target>_REAL_NAME, so restore the old behavior.
+if ( POLICY CMP0078 )
+  cmake_policy( SET CMP0078 OLD )
 endif ()
 
 # workaround for cmake bug #0013449
@@ -14,8 +14,8 @@ else ()
     set ( SWIG_FOUND TRUE )
   endif ()
 endif ()
-find_package ( PythonLibs REQUIRED )
 find_package ( PythonInterp REQUIRED )
+find_package ( PythonLibs REQUIRED )
 
 include ( UseSWIG )
 include_directories ( BEFORE ${CMAKE_SOURCE_DIR}/src )
@@ -24,6 +24,8 @@ link_directories ( ${CMAKE_CURRENT_BINARY_DIR}/../src )
 
 if ( DOCUMENTATION )
   set(CMAKE_SWIG_FLAGS -DDOXYGEN=${DOXYGEN_FOUND})
+  # manually add dependency for new cmake / swig versions
+  set_property(SOURCE ftdi1.i PROPERTY DEPENDS ftdi1_doc.i)
 endif()
 if(NOT CMAKE_VERSION VERSION_LESS 3.8.0)
   swig_add_library ( ftdi1 LANGUAGE python SOURCES ftdi1.i )