building pine

[高生旺]

Hello

While I was building pine, I got the error messages as following. How to 
solve?

filter.o(.text+0x4815): In function `gf_convert_utf8_charset':
: undefined reference to `libiconv'
filter.o(.text+0x4955): In function `gf_convert_utf8_charset':
: undefined reference to `libiconv'
filter.o(.text+0x4a43): In function `gf_convert_utf8_charset':
: undefined reference to `libiconv'
strings.o(.text+0xcb4): In function `make_iconv_d':
: undefined reference to `libiconv_open'
strings.o(.text+0x15f6): In function `get_iconv_d':
: undefined reference to `libiconv'
strings.o(.text+0x16bf): In function `get_iconv_d':
: undefined reference to `libiconv_close'
strings.o(.text+0x177e): In function `conv_sstrncpy':
: undefined reference to `libiconv'
strings.o(.text+0x5c85): In function `conversion_table':
: undefined reference to `libiconv_close'
collect2: ld returned 1 exit status
make: *** [pine] Error 1

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