[SOLVED] Using Armadillo library on QT creator

RDiGuida

Hello, I am trying to run a test for the Armadillo library (5.2) which I have downloaded and I have uncommented the lines cmakedefine ARMA_USE_LAPACK and cmakedefine ARMA_USE_BLAS in the config.hpp.cmake file as recommended for Windows here. I have set the .pro file as such

QT       += core

QT       -= gui

TARGET = armatest
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += \
    main.cpp

INCLUDEPATH += C:\Armadillo\include


LIBS += -LC:\Armadillo\lib_win64
    -llapack_win64_MT
    -lblas_win64_MT

Considering that lapack_win64_MT.lib and blas_win64_MT.lib are the libraries located in C:\Armadillo\lib_win64\

The error I keep on receiving is

undefined reference to 'dgetrf_'
undefined reference to 'ddot_'
undefined reference to 'dgemv_'

etc. as if I am not linking the libraries properly. What am I missing?

Pablo J. Rogina

@RDiGuida said:
Just seaching "undefined reference to 'dgetrf_'" I came across this post which seems to refer the issue as a linking problem based on the order of LAPACK and BLAS libraries. If the suggestion works for you, please confirm here. Good luck!

SGaist

Hi,

To add to @Pablo-J.-Rogina: is it a typo or are you missing the backslashes on the LIBS lines ?

RDiGuida

Update: I found out one of the problems was the wrong version for the BLAS and LAPACK libraries. I downloaded the 32-bit and compiles fine with Code::Blocks but I still have the problem with Qt creator (which uses the same compiler as Code::Blocks!). I reckon it may be a problem with the .pro file. @SGaist where should I add the backslashes? Can you give me an example?

SGaist

LIBS += \ 
    -LC:\Armadillo\lib_win64 \
    -llapack_win64_MT \
    -lblas_win64_MT

RDiGuida

Yes! That was the problem! Thanks @SGaist

SGaist

You're welcome !

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