错误描述：
ext/gd/libgd/gdkanji.o: In function `do_convert':
/home/sh/php-5.2.17/ext/gd/libgd/gdkanji.c:350: undefined reference to `libiconv_open'
/home/sh/php-5.2.17/ext/gd/libgd/gdkanji.c:365: undefined reference to `libiconv'
/home/sh/php-5.2.17/ext/gd/libgd/gdkanji.c:381: undefined reference to `libiconv_close'
ext/iconv/iconv.o: In function `_php_iconv_strlen':
解决：
修改Makefile,在 EXTRA_LIBS里面添加 -liconv
