fcitx-3.0.0rc2 编译错误，如何解决？

songzw

编译时如下错误，怎么处理？
~/fcitx-3.0.0/src/ui.c:77: undefined reference to `libiconv_open'
xim.o(.text+0x670): In function `SendHZtoClient':
~/fcitx-3.0.0/src/xim.c:320: undefined reference to `libiconv'
collect2: ld returned 1 exit status
make[1]: *** fcitx 错误 1
make[1]: Leaving directory `~/fcitx-3.0.0/src'
make: *** [all-recursive] 错误 1