CGAL users discussion list

[Daniel Duque <>]

Hi everyone,

I never understood how cmake works, but up to this day I have been able to hack the CMakeLists.txt file created by the CGAL scripts. I was even able to compile against the Eigen libs even if cmake compiler complained about not finding them. The .h files where found at the compiling step nevertheless.

Right now, I am trying to include the cholmod part of the suitesparse package. In the process, I have learned to include the eigen3 libs, but I am still unable to compile. I include the CMakeLists.txt file below. I run

cmake -DCGAL_DIR=$HOME/CGAL-4.6.3 -DCMAKE_BUILD_TYPE=Release -DEIGEN3_INCLUDE_DIR=/usr/local/include/eigen-eigen-1306d75b4a21/  .

And I get

-- Build type: Release

-- USING CXXFLAGS = ' -frounding-math -O3 -DNDEBUG'

-- USING EXEFLAGS = '  '

-- Targetting Unix Makefiles

-- Using /usr/bin/c++ compiler.

-- Requested component: Core

-- Requested component: MPFR

-- Requested component: GMP

-- Found Eigen3: /usr/local/include/eigen-eigen-1306d75b4a21/ (found suitable version "3.2.2", minimum required is "3.1.0") 

-- Could NOT find CHOLMOD (missing:  CHOLMOD_LIBRARIES) 

-- Configuring done

-- Generating done

-- Build files have been written to: /home/daniel/fem/embedded

So that when running make I get

-- Build type: Release

-- USING CXXFLAGS = ' -frounding-math -O3 -DNDEBUG'

-- USING EXEFLAGS = '  '

-- Targetting Unix Makefiles

-- Using /usr/bin/c++ compiler.

-- Requested component: Core

-- Requested component: MPFR

-- Requested component: GMP

-- Configuring done

-- Generating done

-- Build files have been written to: /home/daniel/fem/embedded

Scanning dependencies of target main

[  9%] Building CXX object CMakeFiles/main.dir/main.cpp.o

In file included from /home/daniel/fem/embedded/linear.h:4:0,

                 from /home/daniel/fem/embedded/main.cpp:11:

/usr/local/include/eigen-eigen-1306d75b4a21/Eigen/CholmodSupport:9:23: fatal error: cholmod.h: No such file or directory

   #include <cholmod.h>

                       ^

compilation terminated.

make[2]: *** [CMakeFiles/main.dir/main.cpp.o] Error 1

make[1]: *** [CMakeFiles/main.dir/all] Error 2

make: *** [all] Error 2

The cholmod.h file is at /use/include/suitesparse, so that changing that line to #include <suitesparse/cholmod.h> leads to a successful compilation... but then linking fails.

I realize this is really not a CGAL topic, but I am sure there are people here who know about cmake.

Thanks very much in advance,

Daniel

The file:

# Created by the script cgal_create_cmake_script

# This is the CMake script for compiling a CGAL application.

project( embedded_ )

cmake_minimum_required(VERSION 2.6.2)

if("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER 2.6)

  if("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}" VERSION_GREATER 2.8.3)

    cmake_policy(VERSION 2.8.4)

  else()

    cmake_policy(VERSION 2.6)

  endif()

endif()

# These don't work ...

#set(CGAL_DIR "${HOME}/CGAL-4.6.3")

#set(CMAKE_BUILD_TYPE "Release")

find_package(CGAL QUIET COMPONENTS Core )

include( ${CGAL_USE_FILE} )

set(EIGEN3_INCLUDE_DIR "/usr/local/include/eigen-eigen-1306d75b4a21/")

find_package(Eigen3)

if(EIGEN3_FOUND)

   include( ${EIGEN3_USE_FILE} )

else()

   message(STATUS "NOTICE: Eigen library is not found.")

endif()

set(CMAKE_MODULE_PATH "/usr/local/include/eigen-eigen-1306d75b4a21/cmake;${CMAKE_MODULE_PATH}")

set(CHOLMOD_LIBRARIES "/usr/include/suitesparse/")

find_package( Cholmod )

include( CGAL_CreateSingleSourceCGALProgram )

create_single_source_cgal_program("main.cpp" "linear.cpp"   "gradient.cpp"  "nabla.cpp" "quad_coeffs.cpp" "periodic.cpp" "fi

elds.cpp" "Delta.cpp" "move.cpp" "draw.cpp" "onto_from_mesh.cpp" )