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"])

])