netgenplugin/adm_local/unix/config_files/check_NETGEN.m4

dnl Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
dnl
dnl Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
dnl CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
dnl
dnl This library is free software; you can redistribute it and/or
dnl modify it under the terms of the GNU Lesser General Public
dnl License as published by the Free Software Foundation; either
dnl version 2.1 of the License, or (at your option) any later version.
dnl
dnl This library is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl Lesser General Public License for more details.
dnl
dnl You should have received a copy of the GNU Lesser General Public
dnl License along with this library; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
dnl
dnl See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
dnl

AC_DEFUN([CHECK_NETGEN],[

AC_REQUIRE([AC_PROG_CXX])dnl
AC_REQUIRE([AC_PROG_CXXCPP])dnl
AC_REQUIRE([CHECK_CAS])dnl

AC_CHECKING([for Netgen])

AC_LANG_SAVE
AC_LANG_CPLUSPLUS

AC_ARG_WITH([netgen],
	    [AC_HELP_STRING([--with-netgen=DIR], [root directory path to NETGEN library installation])],
	    [NETGEN_HOME=$withval],[NETGEN_HOME=yes])

NETGEN_INCLUDES=""
NETGEN_LIBS=""
NETGEN_V5=no

AC_SUBST(NETGEN_INCLUDES)
AC_SUBST(NETGEN_LIBS)

Netgen_ok=no

if test "x$NETGEN_HOME" = "x" -o "x$NETGEN_HOME" = "xyes" -o "x$NETGEN_HOME" = "xauto" ; then
  # auto-detection

  if test "x$NETGENHOME" != "x" ; then
    # - by environment variable NETGENHOME
    NETGEN_HOME=$NETGENHOME
  else
    # - by searching NETGEN executables
    AC_PATH_PROG([TEMP], [ng_stl])
    if test "x$TEMP" != "x" ; then
      NETGEN_BIN_DIR=`dirname $TEMP`
      NETGEN_HOME=`dirname $NETGEN_BIN_DIR`
    else
      NETGEN_HOME=""
    fi
  fi 
fi

echo NETGEN_HOME=$NETGEN_HOME

if test "x$NETGEN_HOME" != "x"; then

  echo ----------------------------------------------------------
  echo You are about to choose to use somehow the
  echo Netgen Library to generate Tetrahedric mesh.
  echo
  echo You are strongly advised to consult the file
  echo NETGENPLUGIN_SRC/src/NETGEN/ReadMeForNgUsers, particularly
  echo about assumptions made on the installation of the Netgen
  echo application and libraries.
  echo ----------------------------------------------------------

  NETGEN_INCLUDES="-I${NETGEN_HOME}/include -I${NETGEN_HOME}/share/netgen/include"
  NETGEN_LIBS_OLD="-L${NETGEN_HOME}/lib -lnglib"
  NETGEN_LIBS_NEW="-L${NETGEN_HOME}/lib -lnglib -linterface -lgeom2d -lcsg -lstl -locc -lmesh"
  
  dnl check Netgen headers availability 

  CPPFLAGS_old="$CPPFLAGS"
  CXXFLAGS_old="$CXXFLAGS"
  CPPFLAGS="$CAS_CPPFLAGS $NETGEN_INCLUDES $CPPFLAGS"
  CXXFLAGS="$CAS_CXXFLAGS $NETGEN_INCLUDES $CXXFLAGS"

  AC_MSG_CHECKING([for Netgen header file])

  AC_CHECK_HEADER([nglib.h], [Netgen_ok=yes], [Netgen_ok=no])

  dnl check Netgen libraries

  NETGEN_LIBS=${NETGEN_LIBS_NEW}

  LIBS_old="$LIBS"
  LIBS="$NETGEN_LIBS $CAS_LDPATH -lTKernel -lTKMath -lTKG3d -lTKBRep -lTKShHealing -lTKSTEP -lTKXSBase -lTKIGES -lTKSTL -lTKTopAlgo -lTKGeomBase $LIBS_old"

  if test "x$Netgen_ok" = "xyes"; then

    AC_MSG_NOTICE([checking for Netgen libraries])

    AC_MSG_CHECKING([libraries ... try new style ])

    AC_TRY_LINK(
      [
        #include <iostream>
        #include <fstream>
        namespace nglib {
        #include "nglib.h"
        }
      ],
      [
        nglib::Ng_Init();
        nglib::Ng_Exit();
      ],
      [Netgen_ok=yes],
      [Netgen_ok=no])

    if test "x$Netgen_ok" = "xno" ; then

        AC_MSG_RESULT([no])

        AC_MSG_CHECKING([libraries ... try old style])

	NETGEN_LIBS=${NETGEN_LIBS_OLD}
        LIBS="$NETGEN_LIBS $CAS_LDPATH -lTKernel -lTKMath -lTKG3d -lTKBRep -lTKShHealing -lTKSTEP -lTKXSBase -lTKIGES -lTKSTL -lTKTopAlgo -lTKGeomBase $LIBS_old"

        AC_TRY_LINK(
          [
            #include <iostream>
            #include <fstream>
            namespace nglib {
            #include "nglib.h"
            }
          ],
          [
            nglib::Ng_Init();
            nglib::Ng_Exit();
          ],
          [Netgen_ok=yes],
          [Netgen_ok=no])

    fi

  fi

  dnl check if Netgen of v5 or v4

  if test "$Netgen_ok" = "yes" ; then

    AC_MSG_RESULT([yes])

    AC_MSG_CHECKING([Netgen version])

    AC_TRY_LINK(
      [
        #include <iostream>
        #include <fstream>
        #define OCCGEOMETRY
        namespace nglib {
        #include "nglib.h"
        }
        #include <occgeom.hpp>
      ],
      [
        nglib::Ng_Init();
        netgen::Mesh* ngMesh;
        ngMesh->CalcLocalH(1.0);
        nglib::Ng_Exit();
      ],
      [NETGEN_V5=yes],
      [NETGEN_V5=no])

  fi

  dnl check OCCT support in Netgen

  if test "$Netgen_ok" = "yes" ; then

    AC_MSG_RESULT([yes])

    AC_MSG_CHECKING([for OCCT support in Netgen library])

    AC_TRY_LINK(
      [
        #include <iostream>
        #include <fstream>
        #define OCCGEOMETRY
        namespace nglib {
        #include "nglib.h"
        }
      ],
      [
        nglib::Ng_Init();
        nglib::Ng_OCC_Geometry* ng_occ_geom = nglib::Ng_OCC_NewGeometry();
        nglib::Ng_Exit();
      ],
      [Netgen_ok=yes],
      [Netgen_ok=no])

  fi

  dnl check SALOME patch in Netgen

  if test "$Netgen_ok" = "yes" ; then

    AC_MSG_RESULT([yes])

    AC_MSG_CHECKING([for SALOME patch in Netgen library])

    AC_TRY_LINK(
      [
        #include <iostream>
        #include <fstream>
        #define OCCGEOMETRY
        namespace nglib {
        #include "nglib.h"
        }
        #include <occgeom.hpp>
      ],
      [
        nglib::Ng_Init();
        netgen::OCCGeometry occgeo;
        nglib::Ng_Exit();
      ],
      [Netgen_ok=yes],
      [Netgen_ok=no])

  fi

  LIBS="$LIBS_old"
  CPPFLAGS="$CPPFLAGS_old"
  CXXFLAGS="$CXXFLAGS_old"

fi

if test "x$Netgen_ok" = xyes ; then

  AC_MSG_RESULT([yes])

  if test "x$NETGEN_V5" = "xyes" ; then
    AC_MSG_RESULT([Netgen is of version 5.0 or newer])
    NETGEN_INCLUDES="$NETGEN_INCLUDES -DNETGEN_V5"
  else
    AC_MSG_RESULT([Netgen is of version 4.9.13 or older])
  fi

else

  AC_MSG_RESULT([no])
  AC_MSG_ERROR([Netgen is not properly installed. Read NETGENPLUGIN_SRC/src/NETGEN/ReadMeForNgUsers for more details.])

fi

AC_LANG_RESTORE

])dnl