On an up-to-date fairly fresh install "emerge kde" has failed with a seg fault at /usr/lib/gcc-lib/i586-pc-linux-gnu/3.2.3/include/g++-v3/bits/stl_map.h:110 - failing at kde_src_compile, line 138.
"emerge info" please Also, you should try scaling back your CFLAGS a bit - this tends to fix things in most cases.
No response to initial query - need more info (including more from the problematic compilation output) to help solve the problem.
re-resolving