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2013-01-30 00:34:39 -0500 asked a question /usr/lib/ undefined reference to `speex_header_free' error

Hi When i am trying to make OpenCv-2.4.2 i get this error:

Linking CXX executable ../../bin/opencv_perf_core /usr/lib/ undefined reference to `speex_header_free' collect2: ld returned 1 exit status make[2]: * [bin/opencv_perf_core] Error 1 make[1]: [modules/core/CMakeFiles/opencv_perf_core.dir/all] Error 2 make: ** [all] Error 2 Please guide me. Thanks in advance