Dear David Wells,
Thank you for your reply! Your explanation helps me to understand this
process better. Yestoday I tried to use "FIND_PACKAGE" as following and it
works:
_________________________________________________________
FIND_PACKAGE(Armadillo)
INCLUDE_DIRECTORIES(${ARMADILLO_INCLUDE_DIRS})
ADD_EXECUTABLE(${TARGET} ${TARGET_SRC})
DEAL_II_SETUP_TARGET(${TARGET})
TARGET_LINK_LIBRARIES(${TARGET} ${ARMADILLO_LIBRARIES})
_________________________________________________________
I will try the commends you recommended later! Thank you very much!
Best,
Pai
On Thursday, May 17, 2018 at 1:53:36 AM UTC+8, David Wells wrote:
>
> Hi Pai,
>
> I think that there is an easier way to do this. More exactly: armadillo
> should not be a target since we don't have to compile anything: we should
> just be able to specify the library we need to link against and (possibly)
> a path to the headers and be done.
>
> Have you installed armadillo in a standard location? If so then you should
> be able to just append
>
> TARGET_LINK_LIBRARIES(${TARGET} armadillo)
>
> to the end of CMakeLists.txt (after the call to PROJECT and
> DEAL_II_INVOKE_AUTOPILOT)
>
> and things should work correctly.
>
> Thanks,
> David Wells
>
> P.S. the CMake module for setting up armadillo looks for a lot of things
> that don't exist on my computer; I recommend avoiding using FIND_PACKAGE.
>
> On Wednesday, May 16, 2018 at 2:54:39 AM UTC-4, Pai Liu wrote:
>>
>> Hi all,
>>
>> I am learning Step-8 in the tutorial. I want to use the library
>> "Armadillo" (which is a library for scientific computing and linear
>> algebra) together with dealii in step-8.cc.
>> To compile a cpp file that only depends on the Armadillo library, one
>> needs to excute the following commends at the commend line : "g++
>> example.cpp -o example -O2 -larmadillo"
>> So I replace "mylib" in dealii documentation about modifying
>> cmakelist.txt with "armadillo", and modify the CMakeList.txt file as the
>> following
>>
>> _____________________________________________________________________
>> CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
>>
>> FIND_PACKAGE(deal.II 8.5.0 REQUIRED
>> HINTS ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
>> )
>> DEAL_II_INITIALIZE_CACHED_VARIABLES()
>>
>> PROJECT(myproject)
>>
>> ADD_LIBRARY(armadillo)
>> DEAL_II_SETUP_TARGET(armadillo)
>>
>> ADD_EXECUTABLE(mycode step-8.cc)
>> DEAL_II_SETUP_TARGET(mycode)
>>
>> TARGET_LINK_LIBRARIES(mycode armadillo)
>> _____________________________________________________________________
>>
>> And I got the the following error:
>>
>> -- Using the deal.II-8.5.1 installation found at
>> /home/liu/deal.ii-candi/deal.II-v8.5.1
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_initialize_cached_variables.cmake
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_setup_target.cmake
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_query_git_information.cmake
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_pickup_tests.cmake
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_add_test.cmake
>> -- Include macro
>> /home/liu/deal.ii-candi/deal.II-v8.5.1/share/deal.II/macros/macro_deal_ii_invoke_autopilot.cmake
>> You have called ADD_LIBRARY for library armadillo without any source
>> files. This typically indicates a problem with your CMakeLists.txt file
>> -- Configuring done
>> CMake Error: Cannot determine link language for target "armadillo".
>> CMake Error: CMake can not determine linker language for target: armadillo
>> -- Generating done
>> -- Build files have been written to: /home/liu/P/homogenization
>>
>>
>>
>>
>>
>> Can anyone help me about this issue about add library?
>> Many thanks in advance!
>>
>>
>
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