An introduction to the Libopt environment is given in the following paper

• J.Ch. Gilbert and X. Jonsson (January, 2009). LIBOPT - An environment for testing solvers on heterogeneous collections of problems. Submitted to ACM Transactions on Mathematical Software. [ps.gz, pdf]

while the user's manual is

• J.Ch. Gilbert and X. Jonsson (January, 2009). LIBOPT - An environment for testing solvers on heterogeneous collections of problems - The manual, version 2.1. INRIA Technical Report, RT-331 revised. [ps.gz, pdf]