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diff --git a/gr-howto-write-a-block-cmake/cmake/Modules/GrSwig.cmake b/gr-howto-write-a-block-cmake/cmake/Modules/GrSwig.cmake
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+# Copyright 2010-2011 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# 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
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+IF(DEFINED __INCLUDED_GR_SWIG_CMAKE)
+    RETURN()
+ENDIF()
+SET(__INCLUDED_GR_SWIG_CMAKE TRUE)
+
+########################################################################
+# Build a swig target for the common gnuradio use case. Usage:
+# GR_SWIG_MAKE(target ifile ifile ifile...)
+#
+# Set the following variables before calling:
+#   - GR_SWIG_FLAGS
+#   - GR_SWIG_INCLUDE_DIRS
+#   - GR_SWIG_LIBRARIES
+#   - GR_SWIG_SOURCE_DEPS
+#   - GR_SWIG_TARGET_DEPS
+########################################################################
+MACRO(GR_SWIG_MAKE name)
+    SET(ifiles ${ARGN})
+
+    INCLUDE_DIRECTORIES(${GR_SWIG_INCLUDE_DIRS})
+    SET(SWIG_MODULE_${name}_EXTRA_DEPS ${GR_SWIG_SOURCE_DEPS})
+
+    FIND_PACKAGE(PythonLibs)
+    INCLUDE_DIRECTORIES(${PYTHON_INCLUDE_DIRS})
+
+    #setup the swig flags with flags and include directories
+    SET(CMAKE_SWIG_FLAGS -fvirtual -modern -keyword -w511 -module ${name} ${GR_SWIG_FLAGS})
+    FOREACH(dir ${GR_SWIG_INCLUDE_DIRS})
+        LIST(APPEND CMAKE_SWIG_FLAGS "-I${dir}")
+    ENDFOREACH(dir)
+
+    #set the C++ property on the swig .i file so it builds
+    SET_SOURCE_FILES_PROPERTIES(${ifiles} PROPERTIES CPLUSPLUS ON)
+
+    #setup the actual swig library target to be built
+    INCLUDE(UseSWIG)
+    SWIG_ADD_MODULE(${name} python ${ifiles})
+    SWIG_LINK_LIBRARIES(${name} ${PYTHON_LIBRARIES} ${GR_SWIG_LIBRARIES})
+    IF(GR_SWIG_TARGET_DEPS)
+        ADD_DEPENDENCIES(${SWIG_MODULE_${name}_REAL_NAME} ${GR_SWIG_TARGET_DEPS})
+    ENDIF(GR_SWIG_TARGET_DEPS)
+
+ENDMACRO(GR_SWIG_MAKE)
+
+########################################################################
+# Install swig targets generated by GR_SWIG_MAKE. Usage:
+# GR_SWIG_INSTALL(
+#   TARGETS target target target...
+#   [DESTINATION destination]
+#   [COMPONENT component]
+# )
+########################################################################
+MACRO(GR_SWIG_INSTALL)
+
+    INCLUDE(CMakeParseArgumentsCopy)
+    CMAKE_PARSE_ARGUMENTS(GR_SWIG_INSTALL "" "DESTINATION;COMPONENT" "TARGETS" ${ARGN})
+
+    FOREACH(name ${GR_SWIG_INSTALL_TARGETS})
+        INSTALL(TARGETS ${SWIG_MODULE_${name}_REAL_NAME}
+            DESTINATION ${GR_SWIG_INSTALL_DESTINATION}
+            COMPONENT ${GR_SWIG_INSTALL_COMPONENT}
+        )
+
+        INCLUDE(GrPython)
+        GR_PYTHON_INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/${name}.py
+            DESTINATION ${GR_SWIG_INSTALL_DESTINATION}
+            COMPONENT ${GR_SWIG_INSTALL_COMPONENT}
+        )
+    ENDFOREACH(name)
+
+ENDMACRO(GR_SWIG_INSTALL)