gcc-4.1.1-r3 and glibc-2.5 are stable on sparc, but can not be installed, while masked in package.mask # Mask gcc-4.x and glibc-2.4 until they are ready >=sys-devel/gcc-4.0.0 >=sys-libs/glibc-2.4 Reproducible: Always
Will be unmasked when 2007.0 is released, read the fine changelogs.