CGAL users discussion list

[Matthew Denno <>]

I think that you need to add LIBS += -lCGAL to your .pro file.  Also you should add -frounding-math flag, but I forget exactly how...I am on my mobile right now so I can't look.

> On Dec 3, 2009 6:53 PM, "Ramin H" <> wrote:
>
> Hi everyone,
>
> I am using CGAL3.5 and Ubuntu 9.10. Most of the examples and demos
> compile successfully but when I try to compile the following code:
>
> ---- begin: main.cpp ----
> #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
> int main() {
>    return 0;
> }
> ---- end main.cpp ----
>
> I get the following errors on the terminal (the Makefile is generated
> from a Qt .pro project file.):
> ------------------
> ramin@ubundev:~/NetBeansProjects/test-cgal$ qmake nef.pro
> ramin@ubundev:~/NetBeansProjects/test-cgal$ make
> g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_XML_LIB
> -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED
> -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore
> -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL
> -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I/usr/include
> -I../../CGAL-3.5/include -I/usr/X11R6/include -I. -o main.o main.cpp
> g++ -Wl,-O1 -o nef main.o    -L/usr/lib -L/usr/X11R6/lib -L/usr/lib
> -L/home/ramin/CGAL-3.5/lib -lQtXml -lQtOpenGL -lQtGui -lQtCore -lGLU
> -lGL -lpthread
> main.o: In function `global constructors keyed to main':
> main.cpp:(.text+0x246): undefined reference to
> `CGAL::assertion_fail(char const*, char const*, int, char const*)'
> main.cpp:(.text+0x270): undefined reference to
> `CGAL::assertion_fail(char const*, char const*, int, char const*)'
> main.cpp:(.text+0x29a): undefined reference to
> `CGAL::assertion_fail(char const*, char const*, int, char const*)'
> main.cpp:(.text+0x2c4): undefined reference to
> `CGAL::assertion_fail(char const*, char const*, int, char const*)'
> collect2: ld returned 1 exit status
> make: *** [nef] Error 1
> ------------------
>
> Any idea what's wrong? Do I need a specific compiler switch to compile
> CGAL programs in this environment?
>
> Thank you,
> -Ramin
>
> --
> You are currently subscribed to cgal-discuss.
> To unsubscribe or access the archives, go to
> https://lists-sop.inria.fr/wws/info/cgal-discuss