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Please check the build logs for more information.
See Builds for ideas on how to fix a failed build, or Metadata for how to configure docs.rs builds.
If you believe this is docs.rs' fault, open an issue.
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cp_sat-0.4.0
Google CP-SAT solver Rust bindings 
Rust bindings to the Google CP-SAT constraint programming solver.
To use this library, you need a C++ compiler and an installation of google or-tools library files.
If you're using a recent version of or-tools, you'll also need libprotobuf (older versions used to link it statically). Invoke Cargo using RUSTFLAGS='-Clink-arg=-lprotobuf' cargo <command>.
The environment variable ORTOOLS_PREFIX is used to find include
files and library files. If not setted, /opt/ortools will be added
to the search path (classical search path will also be used).