ppracer fails because it can't find libtcl8.4.so, and a rebuild does not help. In /usr/lib libtcl.so is a symlink to libtcl8.4.so, which does not exist. libtcl8.4g.so does exist. (libtk has the same issues) Looking in the Makefile after doing an "ebuild compile" on tcl, I find the lines # Libraries built with optimization switches have this additional extension TCL_DBGX = g I do have -O2 in my CFLAGS. It looks like the ebuild creates the symlink from libtcl.so the the actual library with the version number, but apparently doesn't account for the "g".
*** This bug has been marked as a duplicate of bug 181919 ***