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Frequently Asked Questions

Mismatch in large file setup!

You try to compile a program using libmpg123 on GNU/Linux or Solaris and get this:

/usr/local/include/mpg123.h:37:2: error: #error "Mismatch in large file setup! 
               Enable/disable large file support appropriately to use libmpg123."
	

This is due to libmpg123 being compile with large file support and your app is trying to compile without... or the other way round. Usually, it is the case that you upgraded to mpg123 1.6, which enabled large file support as default and your app build fails to use the switch for enabling large support.

Solution

The usual case is resolved by this:

1. Make sure you use off_t properly for all file offsets (mpg123 API, but also other file I/O).
2. Add -D_FILE_OFFSET_BITS=64 to your compiler flags -- for the whole build.

Note that just disabling large file support in libmpg123 may be an option, but not a smart move. Everyone should use large file support nowadays and GNU/Linux distributions use it as default.

I want my music in asterisk and the mpg123 on my distro is just rubbish!

You are living in the past. See my message to the asterisk community.

I want to compile with Alsa but configure fails - what do I need?

Most likely, you are missing the header files for the alsa library (libasound) or even the library itself.

No sound on my AMD64 / x86_64 machine!

See bug 1547470. There is an issue with alsa < 1.0.13 that breaks mpg123 when compiled with 64bits (on this platform only?). So just upgrade alsa and it should be fine.