udf_median library compiles fine but when loading, you get this message
mysql> CREATE AGGREGATE FUNCTION median RETURNS REAL SONAME 'udf_median.so';
ERROR 1127 (HY000): Can't find function 'median_clear' in library
Running mysql v5 under debian linux
tom@alkali.org
I had the exact same problem with Ubuntu 8.04
There is a patch in the "patches" section of this project that addresses this problem.