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* build-sys: Update orc.m4 to latest upstream versionMaarten Bosmans2011-06-241-4/+17
| | | | ORCC is now correctly set to orcc on build system instead of host for cross-compiling
* echo-cancel: orc-ify some bits for optimisationArun Raghavan2010-09-231-0/+56
This uses Orc to optimise an inner loop in the core NLMS function of the Adrian echo canceller.