openflow: update fetching of openflow after porting to CMake

build-support/custom-modules/ns3-fetch-optional-modules-dependencies.cmake

@@ -25,13 +25,31 @@ ExternalProject_Add(
 
 ExternalProject_Add(
   openflow_dep
-  URL https://code.nsnam.org/openflow/archive/d45e7d184151.zip
-  URL_HASH MD5=a068cdaec5523586921b2f1f81f10916
+  GIT_REPOSITORY https://gitlab.com/nsnam/openflow.git
+  GIT_TAG 4869d4f6900342440af02ea93a3d8040c8316e5f
   PREFIX openflow_dep
   BUILD_IN_SOURCE TRUE
-  CONFIGURE_COMMAND ./waf configure --prefix ${CMAKE_OUTPUT_DIRECTORY}
-  BUILD_COMMAND ./waf build
-  INSTALL_COMMAND ./waf install
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${CMAKE_OUTPUT_DIRECTORY}
+)
+
+find_file(
+  BOOST_STATIC_ASSERT
+  NAMES static_assert.hpp
+  PATH_SUFFIXES boost
+  HINTS /usr/local
+)
+
+if(${BOOST_STATIC_ASSERT} STREQUAL "BOOST_STATIC_ASSERT-NOTFOUND")
+  message(FATAL_ERROR "Boost static assert is required by openflow")
+endif()
+
+get_filename_component(boost_dir ${BOOST_STATIC_ASSERT} DIRECTORY)
+
+install(
+  DIRECTORY ${boost_dir}
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+  USE_SOURCE_PERMISSIONS
+  PATTERN "boost/*"
 )
 
 install(