licenses/libf2c is only a warranty disclaimer, not a license. If you look into the f2c and libf2c tarballs, you'll find files "notice" and "Notice", respectively, conciding with what we call "as-is". It also appears in the header of the individual files in f2c. So, licenses/libf2c should be deleted and the *f2c packages be changed to LICENSE="as-is".
Thanks for digging for the correct license + 24 Feb 2011; Justin Lecher <jlec@gentoo.org> libf2c-20070912.ebuild, + libf2c-20090407-r1.ebuild: + Correct license to as-is, #356271 +
I've fixed dev-lang/f2c too.