Page History

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1. hardware architecture, such as i686, x86_64, sparc, etc.,
2. operating system brief name, such as rhel5, solrhel6, winxprhel7, etc.,
3. compiler name and version, such as gcc43gcc41, cc58, msc8gcc44, etc.,
4. debug/optimize/profile option, one of dbg, opt, prof.

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