The dbase conrtib doesn't compile

In HEAD contrib/dbase:

gcc -pipe -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../../src/
interf
aces/libpq -I. -I../../src/include   -c -o dbf2pg.o dbf2pg.c
dbf2pg.c:19: iconv.h: No such file or directory
dbf2pg.c:38: syntax error before `iconv_d'
dbf2pg.c:38: warning: type defaults to `int' in declaration of `iconv_d'
dbf2pg.c:38: warning: data definition has no type or storage class
dbf2pg.c: In function `convert_charset':
dbf2pg.c:148: warning: implicit declaration of function `iconv'
dbf2pg.c: In function `main':
dbf2pg.c:789: warning: implicit declaration of function `iconv_open'
dbf2pg.c:790: `iconv_t' undeclared (first use in this function)
dbf2pg.c:790: (Each undeclared identifier is reported only once
dbf2pg.c:790: for each function it appears in.)
dbf2pg.c:810: warning: implicit declaration of function `iconv_close'
gmake: *** [dbf2pg.o] Error 1

Chris