Solaris 9, fontconfig 2.3.1 [fc-cache] breaks

[Mauric]

i have update the version of libiconv to 1.9.2 and freetype-2.1.9
the ./configure <with options> from fontconfig-2.3.1 run's without problems but if i run gmake i become this strange error.

<snip>
/bin/bash ../libtool --mode=link gcc -g -O2 -o fc-cache fc-cache.o ../src/l
ibfontconfig.la
gcc -g -O2 -o .libs/fc-cache fc-cache.o ../src/.libs/libfontconfig.so -L/usr/lo
cal/lib /usr/local/lib/libfreetype.so -lz /usr/lib/libexpat.so -R/usr/local/lib
Undefined first referenced
symbol in file
libiconv_open ../src/.libs/libfontconfig.so
libiconv ../src/.libs/libfontconfig.so
ld: fatal: Symbol referencing errors. No output written to .libs/fc-cache
collect2: ld returned 1 exit status
*** Error code 1
make: Fatal error: Command failed for target `fc-cache'

i don't know now how i can solve this problem,
can you please give me any more brain tips to
made a succesfuly Compilation for me fontconfig ver.

thanks in advance
best regards
Maurizio