I was able to clone and successfully build the Freedom E SDK from commit b7436b28 on Github on a Novena laptop, which has the armhf architecture. Following the guide in the README, I successfully built demo_gpio and uploaded it to the HiFive1 with OpenOCD.
When I tried to build the dhrystone demo, the build failed with this error:
/home/brandon/repos/freedom-e-sdk/bsp/env/freedom-e300-hifive1/init.o: In function `mtime_lo':
/home/brandon/repos/freedom-e-sdk/bsp/env/freedom-e300-hifive1/init.c:142: undefined reference to `handle_m_time_interrupt'
/home/brandon/repos/freedom-e-sdk/bsp/env/freedom-e300-hifive1/init.c:142: undefined reference to `handle_m_ext_interrupt'
collect2: error: ld returned 1 exit status
/home/brandon/repos/freedom-e-sdk/bsp/env/common.mk:44: recipe for target 'dhrystone' failed
make[1]: *** [dhrystone] Error 1
make[1]: Leaving directory '/home/brandon/repos/freedom-e-sdk/software/dhrystone'
Makefile:197: recipe for target 'software' failed
make: *** [software] Error 2