Problem configuring lilypond 1.5.50

[Pierre]

Hi,

I try to configure lilypond-1.5.50 on my linux slackware 8 with 
gcc-3.0.4,
and i got this :

[...]
checking for kpathsea/kpathsea.h... no
checking for kpse_find_file in -lkpathsea... no
checking for kpse_find_file... no
configure: error: Cannot find kpathsea functions.  You should install 
kpathsea; see INSTALL.txt.  Rerun ./configure --without-kpathsea only 
if kpathsea is not available for your platform.


In fact my kpathsea.h is at /usr/share/texmf/include/kpathsea/kpathsea.h
How can I tell it to the configure ?



It would be great if you could help me with this !

Best regards,

Pierre.