[gentoo-embedded] How to detect uclibc in ebuilds?

[Ed W]

Hi, I have a few ebuilds gathering dust which fixup some bugs when 
building on uclibc platforms. Can someone set me straight on the correct 
ebuild speak to conditionally do something only if we are building on 
uclibc? 

Is it to depend on USE=elibc_uclibc ?

Thanks

Ed W