AC_DEFUN([LX_CHECK_SOPLEX],

[

  AC_ARG_WITH([soplex],

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

AS_HELP_STRING([--without-soplex], [disable checking for SOPLEX]),

              [], [with_soplex=yes])

  AC_ARG_WITH([soplex-includedir],

AS_HELP_STRING([--with-soplex-includedir=DIR], [search for SOPLEX headers in DIR]),

              [], [with_soplex_includedir=no])

  AC_ARG_WITH([soplex-libdir],

AS_HELP_STRING([--with-soplex-libdir=DIR], [search for SOPLEX libraries in DIR]),

              [], [with_soplex_libdir=no])

  lx_soplex_found=no

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

    AC_MSG_CHECKING([for SOPLEX])

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

      SOPLEX_CXXFLAGS="-I$with_soplex_includedir"

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

      SOPLEX_CXXFLAGS="-I$with_soplex/src"

    fi

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

      SOPLEX_LDFLAGS="-L$with_soplex_libdir"

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

      SOPLEX_LDFLAGS="-L$with_soplex/lib"

    fi

    SOPLEX_LIBS="-lsoplex -lz"

    lx_save_cxxflags="$CXXFLAGS"

    lx_save_ldflags="$LDFLAGS"

    lx_save_libs="$LIBS"

    CXXFLAGS="$SOPLEX_CXXFLAGS"

    LDFLAGS="$SOPLEX_LDFLAGS"

    LIBS="$SOPLEX_LIBS"

    lx_soplex_test_prog='

      #include <soplex.h>

      int main(int argc, char** argv)

      {

        soplex::SoPlex soplex;

        return 0;

      }'

    AC_LANG_PUSH(C++)

    AC_LINK_IFELSE([$lx_soplex_test_prog], [lx_soplex_found=yes], [lx_soplex_found=no])

    AC_LANG_POP(C++)

    CXXFLAGS="$lx_save_cxxflags"

    LDFLAGS="$lx_save_ldflags"

    LIBS="$lx_save_libs"

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

      AC_DEFINE([LEMON_HAVE_SOPLEX], [1], [Define to 1 if you have SOPLEX.])

      lx_lp_found=yes

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

      AC_MSG_RESULT([yes])

    else

      SOPLEX_CXXFLAGS=""

      SOPLEX_LDFLAGS=""

      SOPLEX_LIBS=""

      AC_MSG_RESULT([no])

    fi

  fi

  SOPLEX_LIBS="$SOPLEX_LDFLAGS $SOPLEX_LIBS"

  AC_SUBST(SOPLEX_CXXFLAGS)

  AC_SUBST(SOPLEX_LIBS)

  AM_CONDITIONAL([HAVE_SOPLEX], [test x"$lx_soplex_found" = x"yes"])

])