Incorporating CGAL into an existing QT6 project

[DarkSun812]

I have a QT6 project with a .pro file and I want to include the CGAL libraries I saw in a StackOverflow question where a person asked the same question but in linux and I can't find the libs folder in the windows installation folder.

The link to the question I found from stack is this: https://stackoverflow.com/questions/8524217/how-do-you-include-cgal-into-a-qt-project-in-qt-creator

This is my .pro file but as you can imagine, I don't have the usr/include folder so I don't know how to proceed.

# TestCGAL.pro
CONFIG += c++17

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

INCLUDEPATH +=   C:/dev/CGAL-6.0/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

FORMS += \
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

[lrineau]

As far as I know, there is not any CGAL developer that uses qmake and .pro files. The CGAL project supports only the use of CMake files.

You will probably not get any useful answer here. I am sorry.

[DarkSun812]

If that is the case, where can I get information on how to incorporate CGAl into a project using QMake?

[lrineau]

Try have a look at qmake documentation: https://doc.qt.io/qt-6/qmake-manual.html. You might find the answers you need.

Your LIBS settings are wrong, for a Windows project: https://doc.qt.io/qt-6/qmake-variable-reference.html#libs

And maybe remove the last \ character from INCLUDEPATH.

[DarkSun812]

Thanks, if I want to switch from QMake to CMake, how can I do it? Because I use windows and as far as I understand CMake is for linux, so I have had many problems to use it from the beginning, so I used QMake at first, but I am open to the option of moving to CMake because I understand that it is faster than QMake.

[lrineau]

CMake is cross-platform. That is the reason why it was adopted by CGAL.

I suggest you have a lot at the documentation. A few references:

• Getting Started with CGAL,
• CMake documentation,
• CMake Tutorial.