dlib and Qt building problem

[schon]

Hi guys,
i have a problem while building a Qt project which is using the dlib library
i have build the dlib in a release mode with the following line:

wget http://dlib.net/files/dlib-19.10.tar.bz2
tar xvf dlib-19.10.tar.bz2
cd dlib-19.10/
mkdir build
cd build
cmake ..
cmake --build . --config Release
sudo make install
sudo ldconfig
cd ..

and in my usr/local/include i have all the include file, i also get in pkg_config repo the .pc for the dlib library but i got the following error when i try to define my deep learning network in Qt.

/home/jimmy/Desktop/Connected_Robotics_Watson/workco/work/mainWindow.cpp:-1: error: undefined reference to `dlib::cpu::pooling::pooling()'

in my .pro i have defined the link to the library with pkg config :

QMAKE_CXXFLAGS += -std=c++11
PKGCONFIG = dlib-1

withtout any network defined in the code, i can build the Qt project but once i have the network, it fails.

I also tried to use a normal cpp project and compile with a cmake and everything worked well so maybe there is a problem when i link to Qt environment.

Thank you in advance guys,

[Davis]

Link to dlib. Give -ldlib

[schon]

Thank you

When i try to just use a simple matric from dlib in my Qt code with the same .pro file, it worked, i can compile and run the program and display the dlib matrix but once i started to define the CNN i got the error.

i have tried to add -ldlib in the .pro file but i get new error...

:-1: error: /usr/local/lib/libdlib.a(cpu_dlib.cpp.o): undefined reference to symbol 'cblas_sscal'
/usr/lib/libblas.so.3:-1: error: error adding symbols: DSO missing from command line

the way i have installed dlib library has created a static library libdlib.a and add the metadata .pc in the pkgconfig repository.
Thank you