QT compiler linker error

[ELIF]

My computer is Ubuntu Desktop 18.04
QMake version 3.1
Using Qt version 5.9.5 in /usr/lib/aarch64-linux-gnu

When I build the project I get the qt Makefile 5 error.How can I solve this?
My error message is below:

makefile:248: recipe for target 'Makefile' failed make: *** [Makefile] Error 5 15:57:18: The process "/usr/bin/make" exited with code 2. Error while building/deploying project forum (kit: JetsonTX2) When executing step "Make"

In my pro file I have

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = forum
TEMPLATE = app
DEFINES += QT_DEPRECATED_WARNING
CONFIG += myfeatures
SOURCES += \
      main.cpp \
     mainwindow.cpp \
    ethernetthread.cpp \
    targetcircle.cpp
HEADERS += \
     mainwindow.h \
    ethernetthread.h \
    targetcircle.h
FORMS += \
        mainwindow.ui
RESOURCES += \
    resources.qrc
CONFIG += link_pkgconfig \
            c++17
INCLUDEPATH += /usr/include/
LIBS += -lzmq

How to solve makefile5 error?

[jsulm]

@ELIF Please post the actual compiler/linker error. it is somewhere above of what you posted.