Fixing detection of EIGEN and PETSC

src/CMakeLists.txt

@@ -19,13 +19,14 @@ target_include_directories (numerics PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../sr
 target_include_directories (numerics PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../openfpm_data/src/)
 target_include_directories (numerics PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../openfpm_io/src/)
 target_include_directories (numerics PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/config)
-target_include_directories (numerics PUBLIC ${PETSC_INCLUDES})
 target_include_directories (numerics PUBLIC ${PARMETIS_ROOT}/include)
 target_include_directories (numerics PUBLIC ${METIS_ROOT}/include)
 target_include_directories (numerics PUBLIC ${HDF5_ROOT}/include)
 target_include_directories (numerics PUBLIC ${LIBHILBERT_INCLUDE_DIRS})
 target_include_directories (numerics PUBLIC ${Boost_INCLUDE_DIRS})
-target_include_directories (numerics PUBLIC ${EIGEN3_INCLUDE_DIR})
+if(EIGEN3_FOUND)
+	target_include_directories (numerics PUBLIC ${EIGEN3_INCLUDE_DIR})
+endif()
 
 target_link_libraries(numerics ${Boost_LIBRARIES})
 target_link_libraries(numerics -L${PARMETIS_ROOT}/lib parmetis)
@@ -33,6 +34,7 @@ target_link_libraries(numerics -L${METIS_ROOT}/lib metis)
 target_link_libraries(numerics -L${HDF5_ROOT}/lib hdf5 hdf5_hl)
 target_link_libraries(numerics -L${LIBHILBERT_LIBRARY_DIRS} ${LIBHILBERT_LIBRARIES})
 if(PETSC_FOUND)
+	target_include_directories (numerics PUBLIC ${PETSC_INCLUDES})
 	target_link_libraries(numerics ${PETSC_LIBRARIES})
 endif()