If SDL_Mixer is compiled with support for libmikmod there are multiple declaration errors due to a small bug in music.c line 1156.
It should say ifndef instead of ifdef.
[PSP] SDL_Mixer
I think the code is correct as-is. The Player_SetSynchroValue and Player_GetSynchroValue functions aren't in the current svn version of libmikmod, so if you're building against external mikmod libraries, then these definitions are needed.
Maybe you were trying to build against both the external and the internal mikmod? Ie. giving both --enable-music-libmikmod and --enable-music-mod to configure could cause that problem.
Maybe you were trying to build against both the external and the internal mikmod? Ie. giving both --enable-music-libmikmod and --enable-music-mod to configure could cause that problem.