cannont run ofxPango example on mac

Hi all,
I trying to play with some chinese font, but I cannot compile roxlu’s ofxPango on mac osx 10.6.
And I get below errors.

Undefined symbols for architecture i386:
“_iconv”, referenced from:
__nl_find_msg in libintl.a(dcigettext.o)
(maybe you meant: _g_iconv_close, _g_iconv_open , _g_iconv , _g_convert_with_iconv , _iconv_canonicalize )
“_iconv_open”, referenced from:
__nl_find_msg in libintl.a(dcigettext.o)
(maybe you meant: _g_iconv_open)
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

Please help thanks very much. ;)__

if I hide some code in example file these bugs will not appear.

ofBackground(255,255,255);

pango = new ofxPango();
context = pango->createContextWithSurface(450.0f, 800.0f);
context->color4f(1.0f, 1.0f, 0.0f, 1.0f);
context->paint();

//layout = context->createPangoLayout();
//layout->setText("???6???2???7???\n\n ??? ??? PS3?3?? ??? ??? PS3? ??? ?? ??? ??? ??? ? ??? HDD(??? ???)? ?? ??? ??. ???HDD? ??? PS3??? ??? ??? ??? ??? “PLAYSTATION®Network”? ??? ? ??? ??? ??? ??? ??? ?? ? ??? ??? ?? ??? ??? ? ??? ???.\n\nHovedgruppen må være på minimum 10 personer, men deltakere kan knytte seg til hovedgruppen fra forskjellige destinasjoner. Tilknytningsbillett er gyldig inntil 24 timer før avreise hovedgruppe.\n\nUnicef said 3m people had been affected and more than 1,400 had been killed. The government said some 27,000 people remained trapped and awaiting help.");
//layout->setWidth(450.0f);
//layout->setJustify(true);

context->color4f(0.1f, 0.1f, 0.1f, 1.0f);

ofxPCPangoFontDescription* fd = new ofxPCPangoFontDescription();
//fd->createFromString(“Arial 11”);
//layout->setFontDescription(*fd);
//layout->show();

text_image.allocate(context->getSurface()->getWidth(), context->getSurface()->getHeight(), OF_IMAGE_COLOR_ALPHA);
text_image.setFromPixels(context->getSurface()->getPixels(), text_image.width, text_image.height, OF_IMAGE_COLOR_ALPHA, true);

please help
Thanks ^^

I found that when I using xcode 3.2.4, these error does not appear.
There error seems only appear in xcode 4.

Thank