How do you include CGAL into a QT project in QT Creator?

Question

I am trying to run some of the sample example code from CGAL as a Qt project, to run in Qt Creator. I expect that I will have to modify the .pro file. How should it be modified to use CGAL libraries?

Answer 1

I'm not familiar with CGAL specifically, but in general , you would need to add the following to your .pro file:

INCLUDEPATH += /path/to/cgal/headers

LIBS += -Lpath/to/cgal/libraries -lcgal_dll_name

You may also need to add some DEFINES if CGAL requires it, ie

DEFINES += SOME_MACRO_THAT_CGAL_REQUIRES

If you were looking for help on CGAL specifically, please clarify your question and I will delete this answer.

Answer 2

Although this is an old question, just for the sake of having a more complete answer, this is what I had to do in the .pro file:

INCLUDEPATH +=   /usr/include/
LIBS        += -L/usr/include/
LIBS        += -lCGAL
LIBS        += -lgmp
LIBS        += -lmpfr // not really needed for me, but added since gmp had to be added too
QMAKE_CXXFLAGS += -frounding-math -O3

Do NOT add stuff like the following, it will get you into trouble with weird error messages, as discussed in this link .

INCLUDEPATH +=   /usr/include/CGAL # do NOT add this!
LIBS        += -L/usr/include/CGAL # do NOT add this!

Answer 3

I'm using Qt 4.8.6, gcc and Fedora 24, and here is my .pro for Qt-CGAL projects :

#-------------------------------------------------
#
# Project created by QtCreator 2017-01-08T14:50:29
#
#-------------------------------------------------    
QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = My CGAL_test
TEMPLATE = app

LIBS += -lgmp -lmpfr -lCGAL

SOURCES += main.cpp\
    mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui