asterisk users - Sep 2004 - Error Compiling libunicall for MFC/R2 with spandsp

Guys, when compiling libunicall i have these errors. Any idea?

creating libunicall.la
(cd .libs && rm -f libunicall.la && ln -s ../libunicall.la
libunicall.la)
if gcc -DHAVE_CONFIG_H -I. -I. -I.     -g -O2 -MT testcall.o -MD -MP -MF  
".deps/testcall.Tpo" -c -o testcall.o testcall.c; \
then mv -f ".deps/testcall.Tpo" ".deps/testcall.Po"; else rm
-f
".deps/testcall.Tpo"; exit 1; fi
/bin/sh ./libtool --mode=link gcc  -g -O2   -o testcall  testcall.o  
-lunicall -lspandsp -ldl -lpthread -laudiofile
gcc -g -O2 -o .libs/testcall testcall.o   
/root/libunicall/.libs/libunicall.so -lspandsp -ldl -lpthread -laudiofile
/usr/local/lib/libspandsp.so: undefined reference to `TIFFDefaultStripSize'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFReadDirectory'
/usr/local/lib/libspandsp.so: undefined reference to `_TIFFmemcpy'
/usr/local/lib/libspandsp.so: undefined reference to `_TIFFmemset'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFWriteScanline'
/usr/local/lib/libspandsp.so: undefined reference to `_TIFFfree'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFSetField'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFClientOpen'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFSetDirectory'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFClose'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFOpen'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFWriteDirectory'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFReadScanline'
/usr/local/lib/libspandsp.so: undefined reference to `_TIFFrealloc'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFStripSize'
/usr/local/lib/libspandsp.so: undefined reference to `TIFFGetField'
collect2: ld returned 1 exit status
make[1]: *** [testcall] Error 1
make[1]: Leaving directory `/root/libunicall'
make: *** [all] Error 2