Todd Gamblin 3ef7c06a48 concretizer: solve with compiler flags but preserve order ... This adds compiler flags to the ASP solve so that we can have conditions based on them in the solve. But, it keeps order out of the solve to avoid unneeded complexity and combinatorial explosions. The solver determines which flags are on a spec, but the order is determined by DAG precedence (childrens' flags take precedence over parents' and are added on the right) and order (order flags were specified on the command line is respected). The solver is responsible for determining when to propagate flags, when to inheit them from other nodes, when to take them from compiler preferences, etc.		2020-11-17 10:04:13 -08:00
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spack	concretizer: solve with compiler flags but preserve order	2020-11-17 10:04:13 -08:00