Turn on LTO for faster linking and to remove a warning.

Author: Kasper Peeters

core/CMakeLists.txt

@@ -299,7 +299,10 @@ target_link_libraries(cadabra2 PRIVATE
    )
 
 if(IPO_SUPPORTED)
+  message(STATUS "IPO / LTO for cadabra2 enabled")     
   set_property(TARGET cadabra2 PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
+  set_target_properties(cadabra2 PROPERTIES COMPILE_FLAGS "-flto=auto")
+  set_target_properties(cadabra2 PROPERTIES LINK_FLAGS "-flto=auto")  
 endif()
 
 

core/packages/CMakeLists.txt

@@ -69,6 +69,14 @@ foreach(PACKAGE ${COMPILED_PACKAGES})
 
   target_link_libraries(${PNAME} PUBLIC cadabra2 ${GMPXX_LIBRARIES})
   target_include_directories(${PNAME} PUBLIC ${CADABRA_CORE_DIR})
+
+  if(IPO_SUPPORTED)
+    message(STATUS "IPO / LTO for ${PNAME} enabled")     
+    set_property(TARGET ${PNAME} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
+    set_target_properties(${PNAME} PROPERTIES COMPILE_FLAGS "-flto=auto")
+    set_target_properties(${PNAME} PROPERTIES LINK_FLAGS "-flto=auto")  
+  endif()
+  
   install(TARGETS ${PNAME} DESTINATION ${PYTHON_CDB_PACKAGE_PATH}/${PINSTALL})
 endforeach()