start applying changes from modtool

swig/CMakeLists.txt

@@ -1,6 +1,6 @@
 # Copyright 2011 Free Software Foundation, Inc.
 #
-# This file is part of GNU Radio
+# This file is part of gr-foo
 #
 # GNU Radio is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,21 +17,33 @@
 # the Free Software Foundation, Inc., 51 Franklin Street,
 # Boston, MA 02110-1301, USA.
 
+########################################################################
+# Check if there is C++ code at all
+########################################################################
+if(NOT foo_sources)
+	MESSAGE(STATUS "No C++ sources... skipping swig/")
+	return()
+endif(NOT foo_sources)
+
 ########################################################################
 # Include swig generation macros
 ########################################################################
 find_package(SWIG)
+find_package(PythonLibs)
+if(NOT SWIG_FOUND OR NOT PYTHONLIBS_FOUND)
+    return()
+endif()
 include(GrSwig)
 include(GrPython)
 
 ########################################################################
 # Setup swig generation
 ########################################################################
-foreach(incdir ${GNURADIO_RUNTIME_INCLUDE_DIRS})
-    list(APPEND GR_SWIG_INCLUDE_DIRS ${incdir}/gnuradio/swig)
-endforeach(incdir)
+set(GR_SWIG_INCLUDE_DIRS $<TARGET_PROPERTY:gnuradio::runtime_swig,INTERFACE_INCLUDE_DIRECTORIES>)
+set(GR_SWIG_TARGET_DEPS gnuradio::runtime_swig)
 
 set(GR_SWIG_LIBRARIES gnuradio-foo)
+
 set(GR_SWIG_DOC_FILE ${CMAKE_CURRENT_BINARY_DIR}/foo_swig_doc.i)
 set(GR_SWIG_DOC_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../include)