AC_DEFUN([LX_CHECK_CLP],

 [

   AC_ARG_WITH([clp],

 AS_HELP_STRING([--with-clp@<:@=PREFIX@:>@], [search for CLP under PREFIX or under the default search paths if PREFIX is not given @<:@default@:>@])

 AS_HELP_STRING([--without-clp], [disable checking for CLP]),

               [], [with_clp=yes])

   AC_ARG_WITH([clp-includedir],

 AS_HELP_STRING([--with-clp-includedir=DIR], [search for CLP headers in DIR]),

               [], [with_clp_includedir=no])

   AC_ARG_WITH([clp-libdir],

 AS_HELP_STRING([--with-clp-libdir=DIR], [search for CLP libraries in DIR]),

               [], [with_clp_libdir=no])

   lx_clp_found=no

   if test x"$with_clp" != x"no"; then

     AC_MSG_CHECKING([for CLP])

     if test x"$with_clp_includedir" != x"no"; then

       CLP_CXXFLAGS="-I$with_clp_includedir"

     elif test x"$with_clp" != x"yes"; then

       CLP_CXXFLAGS="-I$with_clp/include"

     fi

     if test x"$with_clp_libdir" != x"no"; then

       CLP_LDFLAGS="-L$with_clp_libdir"

     elif test x"$with_clp" != x"yes"; then

       CLP_LDFLAGS="-L$with_clp/lib"

     fi

     CLP_LIBS="-lClp -lCoinUtils -lm"

     lx_save_cxxflags="$CXXFLAGS"

     lx_save_ldflags="$LDFLAGS"

     lx_save_libs="$LIBS"

     CXXFLAGS="$CLP_CXXFLAGS"

     LDFLAGS="$CLP_LDFLAGS"

     LIBS="$CLP_LIBS"

     lx_clp_test_prog='

       #include <coin/ClpModel.hpp>

       int main(int argc, char** argv)

       {

         ClpModel clp;

         return 0;

       }'

     AC_LANG_PUSH(C++)

     AC_LINK_IFELSE([$lx_clp_test_prog], [lx_clp_found=yes], [lx_clp_found=no])

     AC_LANG_POP(C++)

     CXXFLAGS="$lx_save_cxxflags"

     LDFLAGS="$lx_save_ldflags"

     LIBS="$lx_save_libs"

     if test x"$lx_clp_found" = x"yes"; then

       AC_DEFINE([HAVE_CLP], [1], [Define to 1 if you have CLP.])

       lx_lp_found=yes

       AC_DEFINE([HAVE_LP], [1], [Define to 1 if you have any LP solver.])

       AC_MSG_RESULT([yes])

     else

       CLP_CXXFLAGS=""

       CLP_LDFLAGS=""

       CLP_LIBS=""

       AC_MSG_RESULT([no])

     fi

   fi

   CLP_LIBS="$CLP_LDFLAGS $CLP_LIBS"

   AC_SUBST(CLP_CXXFLAGS)

   AC_SUBST(CLP_LIBS)

   AM_CONDITIONAL([HAVE_CLP], [test x"$lx_clp_found" = x"yes"])

 ])