If you use CC="gcc -m64 -static -static-libgcc" (the -static-libgcc is optional) and specify -without-system-verto during configure, the build will fail in kdc:
../lib/libverto.a(verto-k5ev.o): In function `periodic_recalc':
verto-k5ev.c:(.text+0x2f0f): undefined reference to `ceil'
Unfortunately, -lverto is the last entry present on the link line, and the configure steps don't appear to readily allow you to specify extra libs to be included at the end, such as -lm.