[Q] Build failed on MacOS X

Hello.

I tried building the Firefox source codes on my Mac, but it fails.

The error message is :

+++ making chrome
/Users/jongampark/Project/OpenSource/firefox-1.0-source/mozilla/netwerk/resources
 => ../../dist/bin/chrome/en-US.jar
error: file '../../toolkit/locales/en-US/chrome/necko/contents.rdf'
doesn't exist at ../../config/make-jars.pl line 418.
make[3]: *** [libs] Error 2
make[2]: *** [libs] Error 2
make[1]: *** [tier_9] Error 2
make: *** [default] Error 2
JongAm-Parks-Computer:~/Project/OpenSource/firefox-1.0-source/mozilla
jongampark$

If any person knows how to solve the problem, please let me know.

FYI, The reason I want to build it is to use the chardet routine.

Thank you in advance.
JongAm Park