dnl Copyright (C) 2007-2013  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.
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_CGAL],[
AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
AC_REQUIRE([CHECK_BOOST])

AC_CHECKING(for CGAL)

AC_ARG_WITH(cgal,
    [  --with-cgal=DIR                 root directory path to CGAL installation ],
    [CGALHOME="$withval"
      AC_MSG_RESULT("select $withval as path to CGAL")
    ])

AC_SUBST(CGAL_INCLUDES)
AC_SUBST(CGAL_LIBS)
AC_SUBST(CGALHOME)

CGAL_INCLUDES=""
CGAL_LIBS=""

cgal_ok=no

LOCAL_INCLUDES=""
LOCAL_LIBS="-lCGAL"

if test "x$CGALHOME" != "xno"; then
    if test "x$CGALHOME" == "xyes"; then
        CGALHOME=""
    fi
    if test -z $CGALHOME
    then
        AC_MSG_WARN(undefined CGALHOME variable which specify CGAL library installation directory)
        AC_PATH_PROG(BINDIR, cgal_create_cmake_script)
        if test "x$BINDIR" != "x" ; then
            CGALHOME=$BINDIR
            CGALHOME=`echo ${CGALHOME} | sed -e "s,[[^/]]*$,,;s,/$,,;s,^$,.,"`
            CGALHOME=`echo ${CGALHOME} | sed -e "s,[[^/]]*$,,;s,/$,,;s,^$,.,"`
        fi
    fi
    if test ! -z $CGALHOME
    then
        cgal_ok=yes
        LOCAL_INCLUDES="-I$CGALHOME/include"
        if test "x$CGALHOME" != "x/usr"; then
            LOCAL_LIBS="-L$CGALHOME/lib $LOCAL_LIBS"
        fi
    fi

dnl check cgallib header

    # CPPFLAGS_old=$CPPFLAGS
    # CPPFLAGS="$CPPFLAGS $LOCAL_INCLUDES -I$BOOSTDIR/include"

    # AC_CHECK_HEADER(algorithm.h,cgal_ok=yes ,cgal_ok=no)

    # CPPFLAGS=$CPPFLAGS_old
fi

# if  test "x$cgal_ok" = "xyes"
# then
# dnl check cgal library
#   LIBS_old="$LIBS"
#   LIBS="$LIBS $LOCAL_LIBS"
#   AC_CHECK_LIB(cgns,cg_open,cgns_ok=yes,cgns_ok=no)
#   LIBS="$LIBS_old" 
# fi

if  test "x$cgal_ok" = "xyes"
then
  CGAL_LIBS="$LOCAL_LIBS"
  CGAL_INCLUDES="$LOCAL_INCLUDES"
  CPPFLAGS="-DWITH_CGAL $CPPFLAGS"
fi

AC_MSG_RESULT(for CGAL: $cgal_ok)

AM_CONDITIONAL(WITH_CGAL, [test x"$cgal_ok" = xyes])

])dnl