Is there a difference between 24Kc and 34Kc for the purpose of cross-compiling for the DIR-505?  Can I safely use the mips 34k toolchain on my system or would I run into subtle bugs?

I build a buildroot toolchain that seems to be for the mips 34kc:
openwrt/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2

I used it to cross-compile a simple C program and it ran on the DIR-505.

But the DIR-505 has MIPS 24Kc CPU

Should I have built a different toolchain?
If there is no difference, why is it called mips_34kc?

i've recently ran into this patch http://lists.infradead.org/pipermail/le … 02336.html that should simplify building for multiple targets

if changed ar71xx cpu type from 34kc to 24kc would it still use 24kec+dsp that is being built for ramips targets or it would build another 24kc toolchain?