Add Prolog in a Qt application

[Amott]

Hello everyone,

I need to add an AI in my application and to do that, I decided to work with Prolog.
I downloaded SWI-Prolog here (32bit version, as I build my project with Qt 5.8 MinGW 32bit), and I installed it.

Then I added the libswipl.lib to my project (right clic / Add library on QtCreator), here is what my .pro looks like :

#-------------------------------------------------
#
# Project created by QtCreator 2017-03-19T17:55:04
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TestProlog
TEMPLATE = app

SOURCES += main.cpp

win32: LIBS += -L$$PWD/'../../../../../Program Files (x86)/swipl/lib/' -llibswipl

INCLUDEPATH += $$PWD/'../../../../../Program Files (x86)/swipl/include'
DEPENDPATH += $$PWD/'../../../../../Program Files (x86)/swipl/include'

win32:!win32-g++: PRE_TARGETDEPS += $$PWD/'../../../../../Program Files (x86)/swipl/lib/libswipl.lib'

After that, I wanted to test if everything is ok, so I took an example on the internet, here is my main.cpp :

#include <QApplication>
#include <QInputDialog>
#include <QMessageBox>

#include <SWI-Prolog.h>
#include <SWI-cpp.h>
#include <SWI-Stream.h>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    PlEngine e(argc, argv);
    QString pal = QInputDialog::getText(0, "Palindrome check", "enter text");
    PlTerm ATOM = PlAtom(qPrintable(pal.toUtf8())), LIST;
    PlCall("atom_codes", PlTermv(ATOM, LIST));
    if (PlCall("reverse", PlTermv(LIST, LIST)))
        QMessageBox::information(0, "outcome", "is a palindrome");
    else
        QMessageBox::information(0, "outcome", "is NOT a palindrome");

    return 0;
}

It successfully build, but when I run the application, it crashes immediately. I tried to debug it by setting a break point on the first line and and error ocurred "During startup program exited with code 0xc0000135".
If I comment Prolog related lines, the application runs normally.

What am I doing wrong ? Did I missed something ?

Thanks in advance for your help, have a good day !

[Eeli K]

@Amott You are probably missing some .dll library. I don't know which one. Try http://www.dependencywalker.com/.

[Amott]

Thanks Eeli K, you were right !
I needed to put 2 DLLs from Prolog into my directory (libswipl.dll and libgmp-10.dll) !
Thanks a lot !