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Back to HeuristicSpecification.

= LP solver support =

Some configurations of Fast Downward, such as optimal cost partitioning for landmark heuristics, require an Linear Programming (LP) solver and will complain if the planner has not been built with support for such a solver.

Fast Downward uses the [[http://www.coin-or.org/|COIN-OR]] LP Solver ([[http://www.coin-or.org/Clp/|CLP]]) with the [[https://projects.coin-or.org/Osi|Open Solver Interface]].

== Instructions for building Fast Downward with LP support ==

Build Fast Downward with LP support as follows:

{{{#!highlight bash
cd downward/search/lp
./setup # Build the LP solver -- might take a few minutes.
cd ..
make distclean # Remove traces of previous builds.
make USE_LP_CLP=1 # Build "search" (debug mode) with LP support.
make USE_LP_CLP=1 release # Build "release-search" (release mode) with LP support.
}}}