有人在FC4下编译firefox成功过吗？

请高人指教，下面是我出的问题。。。

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我的.mozconfig 文件:
mk_add_options MOZ_CO_PROJECT=browser
ac_add_options --enable-application=browser

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我的配置命令
# ./configure --prefix=/usr/local/firefox

出错信息
checking for pkg-config... /usr/bin/pkg-config
checking for gtk+-2.0 >= 1.3.7... Package gtk+-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found

configure: error: Library requirements (gtk+-2.0 >= 1.3.7) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.

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我设置了PKG_CONFIG_PATH环境后还是出上面的问题
# echo $PKG_CONFIG_PATH
/usr/local/lib/pkgconfig:/usr/lib/pkgconfig