CGAL users discussion list

[Ben Laurie <>]

Gotcha, thanks. That fixed my build problem (and reveals I've got inconsistent versions of bits of Qt5 installed, but I assume it will work once I've dealt with that!).

On Wed, 3 Feb 2021 at 10:06, Sebastien Loriot <> wrote:

Sorry I though you were familiar with cmake.

cmake script = CMakeLists.txt

the target is then "foobar" if you have "foobar.cpp" in
create_single_source_cgal_program


Sebastien.

On 2/3/21 11:01 AM, Ben Laurie wrote:
> Hmm - I am not using a script, instead I am using
> .../cgal/Scripts/scripts/cgal_create_CMakeLists as the documentation
> suggests.
>
> On Wed, 3 Feb 2021 at 09:56, Sebastien Loriot <
> <mailto:>> wrote:
>
>     You need to have in your cmake script:
>
>     find_package(CGAL REQUIRED OPTIONAL_COMPONENTS Qt5)
>
>     if(CGAL_Qt5_FOUND)
>         #define your exe my_target
>         target_link_libraries(my_target PUBLIC CGAL::CGAL_Qt5)
>     endif()
>
>
>     Sebastien.
>
>
>     On 2/3/21 10:52 AM, Ben Laurie wrote:
>      >
>      >
>      > On Wed, 3 Feb 2021 at 08:26, Sebastien Loriot
>     < <mailto:>
>      > <mailto: <mailto:>>> wrote:
>      >
>      >     You should not give include paths by hand but use the cmake
>     config file
>      >     generated by your QT installation.
>      >
>      >     See
>      >
>     https://doc.cgal.org/latest/Manual/configurationvariables.html#title9 <https://doc.cgal.org/latest/Manual/configurationvariables.html#title9>
>     <https://doc.cgal.org/latest/Manual/configurationvariables.html#title9
>     <https://doc.cgal.org/latest/Manual/configurationvariables.html#title9>>
>      >
>      >     Qt5_DIR can be a cmake variable (cmake -DQt5_DIR=...) or an
>     environment
>      >     variable.
>      >
>      >
>      > If I do this I get this warning from cmake:
>      >
>      > CMake Warning:
>      >    Manually-specified variables were not used by the project:
>      >
>      >      Qt5_DIR
>      >
>      > The previous suggestion (i.e. using CMakeLists.txt from the
>     examples)
>      > works as well as the manual configuration I posted in the first
>     place -
>      > that is, I end up with:
>      >
>      > /usr/local/include/CGAL/Qt/image_interface.h:21:10: fatal error:
>      >        'ui_ImageInterface.h' file not found
>      > #include "ui_ImageInterface.h"
>      >
>      >
>      >     Sebastien.
>      >
>      >     On 1/30/21 5:30 PM, Ben Laurie wrote:
>      >      > I'm trying to compile the basic example
>      >      >
>      >   
>       (https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake>
>      >   
>       <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake>>
>      >
>      >      >
>      >   
>       <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake>
>      >   
>       <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake <https://doc.cgal.org/latest/Manual/devman_create_and_use_a_cmakelist.html#subcmake>>>)
>      >
>      >      > and I have to pass lots of arguments to CMake to include
>     the qt5
>      >     files
>      >      > ... like this:
>      >      >
>      >      > cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-Wall
>     -Werror
>      >      > -I/usr/local/include/qt5 -I/usr/local/include/qt5/QtWidgets
>      >      > -I/usr/local/include/qt5/QtGui -I/usr/local/include/qt5/QtXml
>      >      > -I/usr/local/include/qt5/QtCore
>     -I/usr/local/include/qt5/QtOpenGL
>      >     -fPIC" .
>      >      >
>      >      > Is this expected? Anyway, after tracking all these down, I
>     end up
>      >     with
>      >      > the error:
>      >      >
>      >      > /usr/local/include/CGAL/Qt/image_interface.h:21:10: fatal
>     error:
>      >      >        'ui_ImageInterface.h' file not found
>      >      >
>      >      > and there's no such file on my machine. Any clue what I'm
>     doing
>      >     wrong?
>      >      >
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