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POLinking to Armadillo libraries with CMake
 

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  1. POLinking to Armadillo libraries with CMake
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    <p>I am trying to install MLPack on windows 8. I configure the CMakeLists.txt file with:</p> <pre><code>set(ARMADILLO_LIBRARY "C:\\Program Files (x86)\\armadillo\\lib") set(ARMADILLO_INCLUDE_DIR "C:\\Program Files (x86)\\armadillo\\include") </code></pre> <p>Then when I ran CMake I had a whole series of warning like these ones:</p> <pre><code>WARNING: Target "mlpack" requests linking to directory "C:\Program Files (x86)\armadillo\lib". Targets may link only to libraries. CMake is dropping the item. </code></pre> <p>In \mlpack-1.0.4\src\mlpack directory I found another CMakeLists file with:</p> <pre><code>target_link_libraries(mlpack ${ARMADILLO_LIBRARIES} ${Boost_LIBRARIES} ${LIBXML2_LIBRARIES} ) </code></pre> <p>that I changed to (not sure if that was a good idea):</p> <pre><code>target_link_libraries(mlpack ${Boost_LIBRARIES} ) link_directories(mlpack ${ARMADILLO_LIBRARIES} ${LIBXML2_LIBRARIES} ) </code></pre> <p>then CMake seems to be running smoothly:</p> <pre><code>-- Found Armadillo: C:\Program Files (x86)\armadillo\lib (found suitable version "3.800.2", minimum required is "2.4.2") -- Found LibXml2: C:\cpp\libraries\libxml2-2.7.8.win32\lib (found suitable version "2.7.8", minimum required is "2.6.0") -- Boost version: 1.53.0 -- Found the following Boost libraries: -- program_options -- unit_test_framework -- Boost version: 1.53.0 -- Found the following Boost libraries: -- random -- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE) -- Configuring done -- Generating done -- Build files have been written to: C:/cpp/libraries/mlpack-1.0.4 </code></pre> <p>but now when running make I have tons of such errors :</p> <pre><code>Linking CXX executable ..\..\..\..\gmm.exe CMakeFiles\gmm.dir/objects.a(gmm_main.cpp.obj):gmm_main.cpp:(.text+0xb9): undefined reference to `wrapper_dgemv_' CMakeFiles\gmm.dir/objects.a(gmm_main.cpp.obj):gmm_main.cpp:(.text$_ZN4arma6auxlib10det_lapackIdEET_RKNS_3MatIS2_EEb[__ZN4arma6auxlib10det_lapackIdEET_RKNS_3MatIS2_EEb]+0x115): undefined reference to `wrapper_dgetrf_' </code></pre> <p>which after investigation seems to be related to Armadillo.</p> <p>Any idea what is happening ? I guess I should use target_link_libraries for Armadillo but I am not sure how.</p>
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    1. COYes, you definitely need target_link_libraries() to link to Armadillo in your own CMakeLists.txt. Can you post your full/relevant parts of CMakeLists.txt
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      1. USVaibhav Desai
    2. COThx a lot. I wonder if I can really post the whole file, it is quite long. For the relevant parts, I just found a line with "find_package(Armadillo 2.4.2 REQUIRED)" and later a line with "include_directories(${ARMADILLO_INCLUDE_DIRS})". But I am real beginner, I might definitly miss something. The full files are here:http://www.mlpack.org/files/mlpack-1.0.4.tar.gz I just made the changes described in the post ...
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    3. COadd something like this: target_link_libraries(gmm.exe ${ARMADILLO_LIBRARIES}). See if this works. Or just use "gmm" instead of "gmm.exe" and try again
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      1. USVaibhav Desai
 

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