libiconv installed,but can't work

I need zhcon,and zhcon need libiconv
so download it from libiconv - GNU Project - Free Software Foundation (FSF) and installed,but still can’t find it when compile zhcon.
why and how to solve that?thank you.
the tail of make install in libiconv,yes,I did installed it!

eq tmp-* genutf8 genutf8 UTF-8.TXT gengb18030z gengb18030z GB18030.TXT core *.stackdump
rm -f -r .libs _libs
make[1]: Leaving directory `/home/as1/tmp/libiconv-1.13/tests'
rm -rf bin

but,I failed find it again,this is the tail of configure message

*** iconv() not found on this system, which is required for utf8 support
***  please install libiconv from
*** http://www.gnu.org/software/libiconv/ first!

all worked on 11.1 of opensuse