OK. While compiling libmustux the configure script complains:
++++++++++++++++++++++++++++++++++++++++++++++++++
checking for ALSA CFLAGS...
checking for ALSA LDFLAGS... -lasound -lm -ldl -lpthread
checking for libasound headers version >= 0.9.0... not present.
checking for snd_ctl_open in -lasound... no
configure: error: *** Alsa is not installed or version is too old
++++++++++++++++++++++++++++++++++++++++++++++++++
The only problem is that:
+++++++++++++++++++++++++++++++++++++++++++++++++
bash-2.05a$ cd /proc/asound
bash-2.05a$ cat version
Advanced Linux Sound Architecture Driver Version 0.9.2.
Compiled on Apr 8 2003 for kernel 2.4.20 with versioned symbols.
+++++++++++++++++++++++++++++++++++++++++++++++++
And headers are installed (I have changed for lasound, and I have found
it). Since i'm running the newest possible version, I suspect that this
is a configure script problem.