Same problem here. I installed apr-devel and apr via yum.
I got scoreboard installed finally, but GTop is giving off errors:
GTop.c:1869: error: syntax error before "state"
GTop.c:1875: error: `state' undeclared (first use in this function)
GTop.c:1875: error: called object is not a function
make: *** [GTop.o] Error 1
MJH/GTop-0.16.tar.gz
/usr/bin/make -- NOT OK
Running make install
Make had returned bad status, install seems impossible
perlmod--Install done