Log Message:
Merge some patches from PR pkg/29644 by Antoine Reilles:
- Use SA_NODEFER instead of SA_NOMASK (if the later is not available).
- Use a subdirectory under ${PREFIX}/share to place the data files.
- Print the failing address on SIGSEGV.
- Make an error message more descriptive (specially helpful when using OSS).
- Fix playback of multiple songs.