I tried to install Gentoo into a chrooted environnement on my debian. I tried a "emerge system" and ... make error ! Perl didn't compile. I looked into the bad makefile and I saw some French word. My LC_ALL was fr_FR, I did a LC_ALL="" and the error disappeared ! So if you want perl compile : look at your locales...
*** This bug has been marked as a duplicate of 8659 ***