As an example, Checksum.S and components containing bits of ASM code seem not to compile with EGCS/GCC 2.96 experimental. I don't know if this problem is with my system or not (I've installed only RH7.0 components and all that are necessary; I'm definitely using the GLIBC and the STD libs from the RH7 package). I have found though, that using an older, say 1.1.2, version of EGCS seems to work to compile things like Checksum.S in the arch library of the linux kernel, but it causes more errors in the long run.
*** This bug has been marked as a duplicate of 18001 ***